705 lines
79 KiB
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705 lines
79 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1015.59683" ID-GBIF-Dataset="c4d4417f-0d6e-42db-a288-bc00e679248f" ID-PMC="PMC7878467" ID-Pensoft-Pub="1313-2970-1015-115" ID-Pensoft-UUID="6A7A97D24F8B582BA5549DDC3ADAD8DE" ID-PubMed="33613043" ID-ZooBank="9CD39543892243088FCBF91306EC3806" ModsDocID="1313-2970-1015-115" checkinTime="1612497286502" checkinUser="pensoft" docAuthor="Tomikawa, Ko, Watanabe, Hiromi Kayama, Tanaka, Katsuhiko & Ohara, Yasuhiko" docDate="2021" docId="65A2D44089665A559E0B23CBBB3EB1E8" docLanguage="en" docName="ZooKeys 1015: 115-127" docOrigin="ZooKeys 1015" docPubDate="2021-02-04" docSource="http://dx.doi.org/10.3897/zookeys.1015.59683" docTitle="Princaxelia marianaensis Tomikawa & Watanabe 2021, sp. nov." docType="treatment" docUuid="B127A8B4-7BDA-4027-A7DA-8C04F61EA6BA" docUuidSource="ZooBank" docVersion="4" id="6A7A97D24F8B582BA5549DDC3ADAD8DE" lastPageNumber="115" masterDocId="6A7A97D24F8B582BA5549DDC3ADAD8DE" masterDocTitle="A new species of Princaxelia from Shinkai Seep Field, Mariana Trench (Crustacea, Amphipoda, Pardaliscidae)" masterLastPageNumber="127" masterPageNumber="115" pageNumber="115" updateTime="1668149762876" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>A new species of Princaxelia from Shinkai Seep Field, Mariana Trench (Crustacea, Amphipoda, Pardaliscidae)</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Tomikawa, Ko</mods:namePart>
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<mods:affiliation>Graduate School of Humanities and Social Sciences, Hiroshima University, Higashi-Hiroshima 739 - 8524, Japan</mods:affiliation>
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<mods:nameIdentifier type="email">tomikawa@hiroshima-u.ac.jp</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Watanabe, Hiromi Kayama</mods:namePart>
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<mods:affiliation>X-STAR, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2 - 15 Natsushima-cho, Yokosuka, Kanagawa 237 - 0061, Japan</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Tanaka, Katsuhiko</mods:namePart>
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<mods:affiliation>Department of Marine Biology, School of Marine Science and Technology, Tokai University, 3 - 20 - 1, Orido, Shimizu, Shizuoka, Shizuoka 424 - 8610, Japan</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Ohara, Yasuhiko</mods:namePart>
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<mods:affiliation>Hydrographic and Oceanographic Department of Japan, 3 - 1 - 1 Kasumigaseki, Chiyoda-ku, Tokyo 100 - 8932, Japan & Research Institute for Marine Geodynamics (IMG), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2 - 15 Natsushima-cho, Yokosuka, Kanagawa 237 - 0061, Japan & Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464 - 8602, Japan</mods:affiliation>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2021</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2021-02-04</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>1015</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>115</mods:start>
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<mods:end>127</mods:end>
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</mods:extent>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.1015.59683</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.1015.59683</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-1015-115</mods:identifier>
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<mods:identifier type="ZooBank">9CD39543892243088FCBF91306EC3806</mods:identifier>
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<mods:identifier type="Pensoft-UUID">6A7A97D24F8B582BA5549DDC3ADAD8DE</mods:identifier>
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<treatment ID-GBIF-Taxon="177212460" LSID="urn:lsid:zoobank.org:act:B127A8B4-7BDA-4027-A7DA-8C04F61EA6BA" httpUri="http://treatment.plazi.org/id/65A2D44089665A559E0B23CBBB3EB1E8" lastPageNumber="115" pageId="0" pageNumber="115">
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<subSubSection pageId="0" pageNumber="115" type="nomenclature">
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<paragraph pageId="0" pageNumber="115">
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<taxonomicName LSID="http://zoobank.org/B127A8B4-7BDA-4027-A7DA-8C04F61EA6BA" authority="Tomikawa & Watanabe" authorityName="Tomikawa & Watanabe" authorityYear="2021" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia marianaensis" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="marianaensis" status="sp. nov.">Princaxelia marianaensis Tomikawa & Watanabe</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="115">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm). Habitus, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure2" httpUri="https://binary.pensoft.net/fig/505318" pageId="0" pageNumber="115">Figures 2</figureCitation>
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">, 3</figureCitation>
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">, 4</figureCitation>
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<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">, 5</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="115" type="materials_examined">
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<paragraph pageId="0" pageNumber="115">Material examined.</paragraph>
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Holotype</emphasis>
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: female (BL 23.9 mm),
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<emphasis bold="true" pageId="0" pageNumber="115">AMNH</emphasis>
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_IZC 00361360, the surface of the chimney which was named as "Chim 4" in CH 3 site in the Shinkai Seep Field (
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<bibRefCitation DOI="https://doi.org/10.1002/2016GC006449" author="Okumura, T" journalOrPublisher="Geochemistry, Geophysics, Geosystems" pageId="0" pageNumber="115" pagination="3775 - 3796" refId="B15" refString="Okumura, T, Ohara, Y, Stern, RJ, Yamanaka, T, Onishi, Y, Watanabe, H, Chen, C, Bloomer, SH, Pujana, I, Sakai, S, Ishii, T, Takai, K, 2016. Brucite chimney formation and carbonate alteration at the Shinkai Seep Field, a serpentinite-hosted vent system in the southern Mariana forearc. Geochemistry, Geophysics, Geosystems 17 (9): 3775 - 3796, DOI: https://doi.org/10.1002/2016GC006449" title="Brucite chimney formation and carbonate alteration at the Shinkai Seep Field, a serpentinite-hosted vent system in the southern Mariana forearc." url="https://doi.org/10.1002/2016GC006449" volume="17" year="2016">Okumura et al. 2016</bibRefCitation>
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), Mariana Trench (
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<geoCoordinate degrees="11" direction="north" minutes="39.36" orientation="latitude" precision="9" value="11.656">11°39.36'N</geoCoordinate>
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,
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<geoCoordinate degrees="143" direction="west" minutes="2.88" orientation="longitude" precision="9" value="-143.048">143°2.88'W</geoCoordinate>
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), 5,689-5,683 m, collected by H. K. Watanabe, 17 July 2014.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="115" type="diagnosis">
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<paragraph pageId="0" pageNumber="115">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="115">Posterodistal corner of epimeral plate 3 quadrate. Primary flagellum article 1 of female antenna 1 not elongate; accessory flagellum article 1 longer than each of the articles 2-6. Maxilla 1 inner plate with 1 terminal plumose seta; palp article 2 expanded, with 8 or 9 apical robust setae. Dactylus of gnathopods 1 and 2 with three strong projections on posterior margin proximal to base. Dorsal margin of coxa 5 highest at proximal end. Venral margin of coxa 7 weakly concave. Telson lobe uniformly tapering distally.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="115" type="description">
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<paragraph pageId="0" pageNumber="115">Description</paragraph>
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" pageId="0" pageNumber="115">
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(female).
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<emphasis italics="true" pageId="0" pageNumber="115">Head</emphasis>
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</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm). Habitus, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure2" httpUri="https://binary.pensoft.net/fig/505318" pageId="0" pageNumber="115">2</figureCitation>
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) as long as pereonites 1 and 2 combined; rostrum short, pointed; lateral cephalic corner rounded; eyes absent. Pleon (Fig.
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm). Habitus, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure2" httpUri="https://binary.pensoft.net/fig/505318" pageId="0" pageNumber="115">2</figureCitation>
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) with dorsal surfaces of pleonites 1-3 smooth; epimeral plates 1-3 (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3A-C</figureCitation>
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) with setae on ventral submargin and posterior margin; posterodistal corner of epimeral plates 2 and 3 quadrate. Dorsal margin of urosomites 1 and 2 (Fig.
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm). Habitus, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure2" httpUri="https://binary.pensoft.net/fig/505318" pageId="0" pageNumber="115">2</figureCitation>
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) with distally oriented projection.
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</paragraph>
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<caption doi="10.3897/zookeys.1015.59683.figure2" httpUri="https://binary.pensoft.net/fig/505318" pageId="0" pageNumber="115" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" pageId="0" pageNumber="115">Figure 2.</emphasis>
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<taxonomicName authorityName="Tomikawa & Watanabe" authorityYear="2021" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia marianaensis" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="marianaensis">
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<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia marianaensis</emphasis>
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</taxonomicName>
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Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm). Habitus, lateral view.
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</paragraph>
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</caption>
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<caption doi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115" start="Figure 3" startId="F3">
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" pageId="0" pageNumber="115">Figure 3.</emphasis>
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<taxonomicName authorityName="Tomikawa & Watanabe" authorityYear="2021" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia marianaensis" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="marianaensis">
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<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia marianaensis</emphasis>
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</taxonomicName>
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Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm)
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<emphasis bold="true" pageId="0" pageNumber="115">A</emphasis>
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epimeral plate 1, lateral view
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<emphasis bold="true" pageId="0" pageNumber="115">B</emphasis>
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epimeral plate 2, lateral view
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<emphasis bold="true" pageId="0" pageNumber="115">C</emphasis>
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epimeral plate 3, lateral view
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<emphasis bold="true" pageId="0" pageNumber="115">D</emphasis>
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antenna 1, lateral view, some distal articles of primary flagellum omitted
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<emphasis bold="true" pageId="0" pageNumber="115">E</emphasis>
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antenna 2, lateral view, flagellum omitted
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<emphasis bold="true" pageId="0" pageNumber="115">F</emphasis>
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upper lip, anterior view
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<emphasis bold="true" pageId="0" pageNumber="115">G</emphasis>
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left mandible, medial view
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<emphasis bold="true" pageId="0" pageNumber="115">H</emphasis>
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left mandible, medial view
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<emphasis bold="true" pageId="0" pageNumber="115">I</emphasis>
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right mandible, medial view
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<emphasis bold="true" pageId="0" pageNumber="115">J</emphasis>
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lower lip, anterior view
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<emphasis bold="true" pageId="0" pageNumber="115">K</emphasis>
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maxilla 1, dorsal view
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<emphasis bold="true" pageId="0" pageNumber="115">L</emphasis>
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palp of maxilla 1, dorsal view
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<emphasis bold="true" pageId="0" pageNumber="115">M</emphasis>
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maxilla 2, dorsal view
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<emphasis bold="true" pageId="0" pageNumber="115">N</emphasis>
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maxilliped, dorsal view.
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</paragraph>
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</caption>
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Antenna 1</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3D</figureCitation>
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) length 0.3 times BL (distal part broken off); peduncular articles 1-3 with length ratio 1.0: 0.7: 0.3; peduncular article 1 broadened, with anterolateral cluster of setae, some weakly plumose; posterior margin of peduncular articles 2 and 3 with clusters of short setae; primary flagellum article 1 length 1.2 times width, 3.0 times as long as article 2; accessory flagellum 6-articulated, article 1 0.9 times as long as articles 2-6 combined; primary flagellum with at least 47 articles.
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</paragraph>
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Antenna 2</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3E</figureCitation>
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) length 0.4 times BL; anterior margin of peduncular article 2 with setae; peduncular articles 4 and 5 with clusters of short setae on anterior margin, article 4 1.1 times longer than article 5; flagellum with 42 articles.
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</paragraph>
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Upper lip</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3F</figureCitation>
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) asetose, with asymmetrically incised ventral margin. Mandibles (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3G-I</figureCitation>
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) slightly asymmetric, incisor margins broad, anteroventral corner with strong tooth; left lacinia mobilis (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3H</figureCitation>
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) broad, about 0.7 times as long as incisor, multi-dentate; right incisor (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3I</figureCitation>
|
|
) with three teeth on proximal to anterodorsal corner; right lacinia weak, with two teeth; accessory setal row of left and right mandibles each with about 20 robust setae; molar absent; mandibular palp 3-articulated with length ratio 1.0: 1.7: 1.5; article 1 asetose; article 2 posteriorly reflected, articles 2 and 3 with 18 and 22 setae, respectively. Lower lip (Fig.
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|
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3J</figureCitation>
|
|
) with broad outer and distinct inner lobes. Maxilla 1 (Fig.
|
|
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3K, L</figureCitation>
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) with inner and outer plates and palp; inner plate small with apical plumose seta; outer plate subrectangular, with 9 robust apical setae and strong projection; palp 2-articulate; article 1 with marginal setae; article 2 expanded distally with nine and eight robust setae on apical margin of left and right maxilla 1, respectively, and with apical submargin and medial margin lined with setae. Maxilla 2 (Fig.
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|
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3M</figureCitation>
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) with inner plate bearing row of 13 plumose setae along apical to medial margin; outer plate slightly longer than inner plate, with three apical plumose setae. Maxilliped (Fig.
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A epimeral plate 1, lateral view B epimeral plate 2, lateral view C epimeral plate 3, lateral view D antenna 1, lateral view, some distal articles of primary flagellum omitted E antenna 2, lateral view, flagellum omitted F upper lip, anterior view G left mandible, medial view H left mandible, medial view I right mandible, medial view J lower lip, anterior view K maxilla 1, dorsal view L palp of maxilla 1, dorsal view M maxilla 2, dorsal view N maxilliped, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure3" httpUri="https://binary.pensoft.net/fig/505319" pageId="0" pageNumber="115">3N</figureCitation>
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) with inner and outer plates and palp; inner plate small, subtriangular, not reaching base of palp, with plumose apical seta and short subapical seta; outer plate oval, reaching base of article 2 of palp, with setae along apical to medial margin; palp 4-articulate, long: article 2 longest with inner marginal rows of setae, article 3 with clusters of setae on dorsal and ventral faces and medial marginal setae, and article 4 slender, with robust setae on medial margin.
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</paragraph>
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Gnathopod 1</emphasis>
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(Fig.
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4A, B</figureCitation>
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) coxa subrectangular, length 1.8 times width, ventral margin straight, posterior submargin and medial face with setae; basis arched, with anterior and posterior margins with numerous setae in a row; posterior margin of merus with sparse setae; carpus oval, length 2.5 times width, posterior margin and medial face setose; propodus slender, length 0.6 times that of carpus, posterior margin weakly convex with setae; dactylus slender, slightly curved, posterior margin with three strong projections proximal to base. Gnathopod 2 (Fig.
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|
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4C, D</figureCitation>
|
|
) coxa tapering anteriorly, length 1.8 times width, posterior submargin with setae; basis slender and straight, anterior and posterior margins densely setose; carpus widely produced posteriorly with numerous long setae, length 2.3 times width; propodus and dactylus similar to gnathopod 1.
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</paragraph>
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|
<caption doi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115" start="Figure 4" startId="F4">
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<paragraph pageId="0" pageNumber="115">
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<emphasis bold="true" pageId="0" pageNumber="115">Figure 4.</emphasis>
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<taxonomicName authorityName="Tomikawa & Watanabe" authorityYear="2021" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia marianaensis" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="marianaensis">
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<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia marianaensis</emphasis>
|
|
</taxonomicName>
|
|
Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm)
|
|
<emphasis bold="true" pageId="0" pageNumber="115">A</emphasis>
|
|
gnathopod 1, lateral view
|
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<emphasis bold="true" pageId="0" pageNumber="115">B</emphasis>
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dactylus of gnathopod 1, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">C</emphasis>
|
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gnathopod 2, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">D</emphasis>
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dactylus of gnathopod 2, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">E</emphasis>
|
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pereopod 3, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">F</emphasis>
|
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dactylus of pereopod 3, lateral view
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<emphasis bold="true" pageId="0" pageNumber="115">G</emphasis>
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pereopod 4, lateral view
|
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<emphasis bold="true" pageId="0" pageNumber="115">H</emphasis>
|
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pereopod 5, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">I</emphasis>
|
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dactylus of pereopod 5
|
|
<emphasis bold="true" pageId="0" pageNumber="115">J</emphasis>
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pereopod 6, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">K</emphasis>
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pereopod 7, lateral view.
|
|
</paragraph>
|
|
</caption>
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<paragraph pageId="0" pageNumber="115">
|
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Pereopod 3</emphasis>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4E, F</figureCitation>
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) coxa weakly rounded ventrally, with submarginal setae; basis long, posterior margin strongly setose; merus, carpus, propodus, and dactylus in length ratio 1.0: 1.4: 1.4: 0.5; posterior margin of propodus lined with short setae. Pereopod 4 (Fig.
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|
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4G</figureCitation>
|
|
) similar to pereopod 3, with coxa tapering anteriorly. Pereopod 5 (Fig.
|
|
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4H, I</figureCitation>
|
|
) coxa subtriangular, dorsal margin highest at proximal end, anterior and ventral submargins with setae; basis length 2.9 times width, with clusters of setae on anterior margin proximal to base, posterodistal corner weakly produced; merus, carpus, propodus, and dactylus in length ratio 1.0: 0.8: 1.2: 0.3; carpus and propodus with robust setae on anterior and posterior margins. Pereopod 6 (Fig.
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|
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4J</figureCitation>
|
|
) coxa weakly concave; basis length 2.5 times width, posterodistal corner quadrate; merus, carpus, propodus, and dactylus in length ratio 1.0: 1.0: 1.2: 0.3. Pereopod 7 (Fig.
|
|
<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A gnathopod 1, lateral view B dactylus of gnathopod 1, lateral view C gnathopod 2, lateral view D dactylus of gnathopod 2, lateral view E pereopod 3, lateral view F dactylus of pereopod 3, lateral view G pereopod 4, lateral view H pereopod 5, lateral view I dactylus of pereopod 5 J pereopod 6, lateral view K pereopod 7, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure4" httpUri="https://binary.pensoft.net/fig/505320" pageId="0" pageNumber="115">4K</figureCitation>
|
|
) coxa weakly concave; basis length 1.9 times width, weakly expanded anteriorly, posterodistal corner quadrate.
|
|
</paragraph>
|
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<paragraph pageId="0" pageNumber="115">
|
|
<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Coxal gills</emphasis>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm). Habitus, lateral view." figureDoi="10.3897/zookeys.1015.59683.figure2" httpUri="https://binary.pensoft.net/fig/505318" pageId="0" pageNumber="115">2</figureCitation>
|
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) on gnathopod 2, pereopods 3-6; coxal gills 2-4 elongate, coxal gill 2 longest, its length exceeding the distal part of basis of gnathopod 2, coxal gill 6 shortest.
|
|
</paragraph>
|
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<paragraph pageId="0" pageNumber="115">
|
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<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Pleopods 1-3</emphasis>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5A-C</figureCitation>
|
|
) each with paired retinacula (Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5B</figureCitation>
|
|
) on inner distal margin of peduncle, and bifid (clothespin) setae (Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5C</figureCitation>
|
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) on inner basal margin of inner ramus; rami articles wide and flattened.
|
|
</paragraph>
|
|
<caption doi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115" start="Figure 5" startId="F5">
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<emphasis bold="true" pageId="0" pageNumber="115">Figure 5.</emphasis>
|
|
<taxonomicName authorityName="Tomikawa & Watanabe" authorityYear="2021" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia marianaensis" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia marianaensis</emphasis>
|
|
</taxonomicName>
|
|
Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm)
|
|
<emphasis bold="true" pageId="0" pageNumber="115">A</emphasis>
|
|
pleopod 1, anterior view, some setae on rami omitted
|
|
<emphasis bold="true" pageId="0" pageNumber="115">B</emphasis>
|
|
retinacula on peduncle of pleopod 1, anterior view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">C</emphasis>
|
|
bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">D</emphasis>
|
|
uropod 1, dorsal view, distal part of outer ramus broken
|
|
<emphasis bold="true" pageId="0" pageNumber="115">E</emphasis>
|
|
uropod 2, dorsal view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">F</emphasis>
|
|
telson, dorsal view.
|
|
<taxonomicName authorityName="Lorz" authorityYear="2010" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia jamiesoni" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
, 2010, holotype female (BL 56.2 mm)
|
|
<emphasis bold="true" pageId="0" pageNumber="115">G</emphasis>
|
|
palp of maxilla 1, dorsal view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">H</emphasis>
|
|
dactylus of gnathopod 1, lateral view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">I</emphasis>
|
|
dactylus of gnathopod 2, medial view
|
|
<emphasis bold="true" pageId="0" pageNumber="115">J</emphasis>
|
|
telson, dorsal view.
|
|
</paragraph>
|
|
</caption>
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Uropod 1</emphasis>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5D</figureCitation>
|
|
) peduncle longer than rami, with 14 basofacial setae, distomedial peduncular projection very strong; inner ramus length 0.8 times that of peduncle, outer ramus distally damaged, rami with setal row along medial and lateral margins. Uropod 2 (Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5E</figureCitation>
|
|
) peduncle slightly longer than rami, with four basofacial setae, distomedial peduncular spine shorter than that of uropod 1; inner ramus length 1.2 times that of outer ramus, rami with setal row along medial and lateral margins. Uropod 3 missing (damaged).
|
|
</paragraph>
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<emphasis bold="true" italics="true" pageId="0" pageNumber="115">Telson</emphasis>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5F</figureCitation>
|
|
) length 2.3 times width, with cleft extending 80% its length; lobes tapering distally with facial setae; apex of each lobe shallowly incised with small robust seta.
|
|
</paragraph>
|
|
</subSubSection>
|
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<subSubSection pageId="0" pageNumber="115" type="etymology">
|
|
<paragraph pageId="0" pageNumber="115">Etymology.</paragraph>
|
|
<paragraph pageId="0" pageNumber="115">The specific name is an adjective derived from the type locality, the Mariana Trench.</paragraph>
|
|
</subSubSection>
|
|
<subSubSection pageId="0" pageNumber="115" type="dna sequence">
|
|
<paragraph pageId="0" pageNumber="115">DNA sequence.</paragraph>
|
|
<paragraph pageId="0" pageNumber="115">A single nucleotide sequence of COI was obtained from the holotype (AMNH_IZC 00361360; 658 bp).</paragraph>
|
|
</subSubSection>
|
|
<subSubSection pageId="0" pageNumber="115" type="remarks">
|
|
<paragraph pageId="0" pageNumber="115">Remarks.</paragraph>
|
|
<paragraph pageId="0" pageNumber="115">
|
|
The morphologies of
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. and congeners are summarized in Table
|
|
<tableCitation captionStart="Table 1" captionStartId="T1" captionText="Table 1. Morphological comparison of Princaxelia species." httpUri="http://table.plazi.org/id/47A31BB393161F68FDF3804F3CAD258C" pageId="0" pageNumber="115" tableUuid="47A31BB393161F68FDF3804F3CAD258C">1</tableCitation>
|
|
.
|
|
<taxonomicName authorityName="Tomikawa & Watanabe" authorityYear="2021" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia marianaensis" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. is most similar to
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
Dahl, 1959 in having a short first flagellar article of the female antenna 1, a weakly setose maxilla 1, coxa 5 with its dorsal margin highest at the proximal end and its distal margin rounded, and a uniformly tapering telson. However,
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. differs from the description of
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
in having the posterodistal corner of epimeral plate 3 quadrate in
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. but rounded in
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
; the accessory flagellum article 1 of the female antenna 1 longer than each of the articles 2-6 in
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. but equal to the length of the remaining segments in
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
; and the ventral margin of the coxa 7 weakly concave in
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. but straight in
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
.
|
|
</paragraph>
|
|
<caption ID-Table-UUID="47A31BB393161F68FDF3804F3CAD258C" httpUri="http://table.plazi.org/id/47A31BB393161F68FDF3804F3CAD258C" pageId="0" pageNumber="115" start="Table 1" startId="T1">
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<emphasis bold="true" pageId="0" pageNumber="115">Table 1.</emphasis>
|
|
Morphological comparison of
|
|
<taxonomicName authorityName="Dahl" authorityYear="1959" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="genus">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia</emphasis>
|
|
</taxonomicName>
|
|
species.
|
|
</paragraph>
|
|
</caption>
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<table pageId="0" pageNumber="115">
|
|
<tr pageId="0" pageNumber="115">
|
|
<th colspan="1" isEmpty="true" pageId="0" pageNumber="115" rowspan="1">-</th>
|
|
<th colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
Tomikawa & Watanabe, sp. nov.
|
|
</th>
|
|
<th colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
Dahl, 1959
|
|
</th>
|
|
<th colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
, 2010
|
|
</th>
|
|
<th colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<taxonomicName lsidName="P. magna" pageId="0" pageNumber="115" rank="species" species="magna">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. magna</emphasis>
|
|
</taxonomicName>
|
|
Kamenskaya, 1977
|
|
</th>
|
|
<th colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<taxonomicName lsidName="P. stephenseni" pageId="0" pageNumber="115" rank="species" species="stephenseni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. stephenseni</emphasis>
|
|
</taxonomicName>
|
|
Dahl, 1959
|
|
</th>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Maximum body size</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">female 23.9 mm</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">male 21 mm, female 32 mm</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">male 57 mm, female 61 mm</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">male 52 mm</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">male 10 mm, female 11 mm</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Epimeral plate 3 posterodistal corner</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">quadrate</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">rounded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">quadrate</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">quadrate</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">weakly rounded</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Dorsal projections on urosomites 1 and 2</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">pointing toward distal end</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">pointing toward distal end</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">pointing upright</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">pointing toward distal end</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Upper lip</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">strongly asymmetrical</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">slightly asymmetrical</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">strongly asymmetrical</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">nearly asymmetrical</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Maxilla 1 palp article 2</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">expanded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">expanded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">expanded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">expanded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">not expanded</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Maxilla 1 palp article 2</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">9 apical robust setae</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">less than 14 apical robust setae</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">25 apical robust setae</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">approx. 10 apical robust setae</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">7 apical robust setae</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Maxilla 1 inner plate</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">1 plumose seta</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">1 plumose seta</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">1 plumose seta</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">6 plumose setae</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">1 plumose seta</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Female antenna 1 primary flagellum article 1</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">not elongated</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">not elongated</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">elongated</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">elongated</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Female antenna 1 accessory flagellum article 1</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">longer than each of the rest</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">equal to length of remaining articles</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">longer than each of the rest</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Gnathopods 1 and 2 dactyli</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">3 strong projections near the base</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">8-9 strong projections near the base</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">4 strong projections near the base</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown (absent?)</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Coxa 5 dorsal margin</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">highest at proximal end</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">highest at proximal end</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">straight</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">convex</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">straight / convex</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Coxa 5 distal margin</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">rounded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">rounded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">rounded</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">slightly pointed</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">straight</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Coxa 7 ventral margin</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">shallowly concave</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">straight</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">slightly concave</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">slightly concave</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">straight</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">Telson lobe</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">uniformly tapering distally</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">uniformly tapering distally</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">tapering from distal 1/3</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">weakly tapering distally</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">unknown</td>
|
|
</tr>
|
|
<tr pageId="0" pageNumber="115">
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">References</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">This study</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<bibRefCitation author="Dahl, E" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="0" pageNumber="115" refId="B4" refString="Dahl, E, 1959. Amphipoda from depth exceeding 6000 meters. In: Galathea Report: Scientific Results of the Danish Deep-Sea Expedition Round the World 1950-1952 (Vol. 1). Danish Science Press, Copenhagen, 211-241." title="Amphipoda from depth exceeding 6000 meters. In: Galathea Report: Scientific Results of the Danish Deep-Sea Expedition Round the World 1950 - 1952 (Vol. 1). Danish Science Press, Copenhagen, 211 - 241." year="1959">Dahl (1959)</bibRefCitation>
|
|
</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
(2010)
|
|
</bibRefCitation>
|
|
; this study
|
|
</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<bibRefCitation author="Kamenskaya, OE" journalOrPublisher="Akademia Nauk SSSR" pageId="0" pageNumber="115" pagination="105 - 114" refId="B9" refString="Kamenskaya, OE, 1977. Two new species of ultraabyssal amphipods from Yap Trench. Akademia Nauk SSSR 108: 105 - 114" title="Two new species of ultraabyssal amphipods from Yap Trench." volume="108" year="1977">Kamenskaya (1977)</bibRefCitation>
|
|
</td>
|
|
<td colspan="1" pageId="0" pageNumber="115" rowspan="1">
|
|
<bibRefCitation author="Dahl, E" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="0" pageNumber="115" refId="B4" refString="Dahl, E, 1959. Amphipoda from depth exceeding 6000 meters. In: Galathea Report: Scientific Results of the Danish Deep-Sea Expedition Round the World 1950-1952 (Vol. 1). Danish Science Press, Copenhagen, 211-241." title="Amphipoda from depth exceeding 6000 meters. In: Galathea Report: Scientific Results of the Danish Deep-Sea Expedition Round the World 1950 - 1952 (Vol. 1). Danish Science Press, Copenhagen, 211 - 241." year="1959">Dahl (1959)</bibRefCitation>
|
|
;
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
(2010)
|
|
</bibRefCitation>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</paragraph>
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<taxonomicName authorityName="Lorz" authorityYear="2010" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia jamiesoni" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
, 2010 was described from 7,703 m and 9,316 m in the Japan and Izu-Ogasawara trenches, respectively (
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
2010
|
|
</bibRefCitation>
|
|
), and subsequently from 7,055-9,583 m in the Kurile-Kamchatka Trench (
|
|
<bibRefCitation DOI="https://doi.org/10.1016/j.pocean.2019.102184" author="Jazdzewska, AM" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="0" pageNumber="115" refId="B8" refString="Jazdzewska, AM, Mamos, T, 2019. High species richness of Northwest Pacific deep-sea amphipods revealed through DNA barcoding. Progress in Oceanography 178: e102184. https://doi.org/10.1016/j.pocean.2019.102184" title="High species richness of Northwest Pacific deep-sea amphipods revealed through DNA barcoding. Progress in Oceanography 178: e 102184." url="https://doi.org/10.1016/j.pocean.2019.102184" year="2019">
|
|
<normalizedToken originalValue="Jażdżewska">Jazdzewska</normalizedToken>
|
|
and Mamos 2019
|
|
</bibRefCitation>
|
|
). Examination of the holotype of
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
reveals new features not originally described which facilitate differentiation of this species from
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov.: the palp article 2 of the maxilla 1 bears eight or nine robust apical setae in
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. but 25 robust apical setae in
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5G</figureCitation>
|
|
); the dactylus of gnathopods 1 and 2 has three strong projections proximal to its base in
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov., but eight or nine strong projections proximal to the base of the dactylus in
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5H, I</figureCitation>
|
|
); and the telson lobe uniformly tapers distally in
|
|
<taxonomicName lsidName="P. marianaensis" pageId="0" pageNumber="115" rank="species" species="marianaensis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. marianaensis</emphasis>
|
|
</taxonomicName>
|
|
sp. nov. but tapers from the distal 1/3 in
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
(Fig.
|
|
<figureCitation captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Princaxelia marianaensis Tomikawa & Watanabe, sp. nov., holotype female (BL 23.9 mm) A pleopod 1, anterior view, some setae on rami omitted B retinacula on peduncle of pleopod 1, anterior view C bifid (clothespin) plumose seta on inner basal margin of inner ramus of pleopod 1, anterior view D uropod 1, dorsal view, distal part of outer ramus broken E uropod 2, dorsal view F telson, dorsal view. Princaxelia jamiesoni Loerz, 2010, holotype female (BL 56.2 mm) G palp of maxilla 1, dorsal view H dactylus of gnathopod 1, lateral view I dactylus of gnathopod 2, medial view J telson, dorsal view." figureDoi="10.3897/zookeys.1015.59683.figure5" httpUri="https://binary.pensoft.net/fig/505321" pageId="0" pageNumber="115">5J</figureCitation>
|
|
). While two projections on the dactylus of the left gnathopod 2 were originally described for
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
, we report nine projections on the right gnathopod 2 of the holotype; we believe that
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
(2010)
|
|
</bibRefCitation>
|
|
described the damaged left gnathopod 2.
|
|
</paragraph>
|
|
<paragraph pageId="0" pageNumber="115">
|
|
The morphology of
|
|
<taxonomicName authorityName="Dahl" authorityYear="1959" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="genus">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia</emphasis>
|
|
</taxonomicName>
|
|
is consistent with an animal that swims in that its body is streamlined, flat, and has well-developed pleopods (
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
2010
|
|
</bibRefCitation>
|
|
). Analyses of the locomotion of
|
|
<taxonomicName authorityName="Dahl" authorityYear="1959" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="genus">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia</emphasis>
|
|
</taxonomicName>
|
|
species demonstrate they have a high swimming ability - a trait useful for preying on other amphipods in hadal trenches (
|
|
<bibRefCitation DOI="https://doi.org/10.1017/S0025315411000452" author="Jamieson, AJ" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="0" pageNumber="115" pagination="143 - 150" refId="B7" refString="Jamieson, AJ, Loerz, AN, Fujii, T, Priede, IG, 2012. In situ observations of trophic behavior and locomotion of Princaxelia amphipods (Crustacea: Pardaliscidae) at hadal depths in four West Pacific Trenches. Journal of the Marine Biological Association of the United Kingdom 92: 143 - 150, DOI: https://doi.org/10.1017/S0025315411000452" title="In situ observations of trophic behavior and locomotion of Princaxelia amphipods (Crustacea: Pardaliscidae) at hadal depths in four West Pacific Trenches." url="https://doi.org/10.1017/S0025315411000452" volume="92" year="2012">Jamieson et al. 2012</bibRefCitation>
|
|
). Amphipods lack a planktonic larval stage and generally have low dispersal ability (
|
|
<bibRefCitation author="Chapman, JW" editor="Carlton, JT" journalOrPublisher="). University of California Press, Berkeley" pageId="0" pageNumber="115" pagination="545 - 618" refId="B2" refString="Chapman, JW, 2007. Gammaridea. In: Carlton, JT, Ed., The Light and Smith manual: Intertidal Invertebrates from Central California to Oregon (4th edn.). University of California Press, Berkeley: 545 - 618" title="Gammaridea." volumeTitle="The Light and Smith manual: Intertidal Invertebrates from Central California to Oregon (4 th edn." year="2007">Chapman 2007</bibRefCitation>
|
|
). Judging from known habitat depths of
|
|
<taxonomicName authorityName="Dahl" authorityYear="1959" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="genus">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia</emphasis>
|
|
</taxonomicName>
|
|
, with the exception of the bathypelagic
|
|
<taxonomicName lsidName="P. stephenseni" pageId="0" pageNumber="115" rank="species" species="stephenseni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. stephenseni</emphasis>
|
|
</taxonomicName>
|
|
, the distributions of species might be expected to be restricted to individual trenches. However,
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
, and especially
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
, are reported from multiple trenches (Fig.
|
|
<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Geographical distributions of the species of Princaxelia (map data from GEBCO Compilation Group [2020]). The exact location of the distribution of P. abyssalis in the Aleutian Trench is uncertain." figureDoi="10.3897/zookeys.1015.59683.figure6" httpUri="https://binary.pensoft.net/fig/505322" pageId="0" pageNumber="115">6</figureCitation>
|
|
) (
|
|
<bibRefCitation author="Kamenskaya, OE" journalOrPublisher="Trudy Instituta Okeanologii" pageId="0" pageNumber="115" pagination="94 - 107" refId="B10" refString="Kamenskaya, OE, 1981. The amphipods (Crustacea) from deep-sea trenches in the western part of the Pacific Ocean. Trudy Instituta Okeanologii 115: 94 - 107" title="The amphipods (Crustacea) from deep-sea trenches in the western part of the Pacific Ocean." volume="115" year="1981">Kamenskaya 1981</bibRefCitation>
|
|
,
|
|
<bibRefCitation author="Kamenskaya, OE" journalOrPublisher="Trudy Instituta Okeanologii" pageId="0" pageNumber="115" refId="B11" refString="Kamenskaya, OE, 1997. Peculiarities of the vertical distribution of the amphipods in the region of the Kuril-Kamchatka Trench. Russian Academy of Sciences, P.P. Shirshov Institute of Oceanology, Moscow, 141-168. [in Russian]" title="Peculiarities of the vertical distribution of the amphipods in the region of the Kuril-Kamchatka Trench. Russian Academy of Sciences, P. P. Shirshov Institute of Oceanology, Moscow, 141 - 168. [in Russian]" year="1997">1997</bibRefCitation>
|
|
;
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
2010
|
|
</bibRefCitation>
|
|
;
|
|
<bibRefCitation DOI="https://doi.org/10.1016/j.pocean.2019.102184" author="Jazdzewska, AM" journalOrPublisher="Journal of the Marine Biological Association of the United Kingdom" pageId="0" pageNumber="115" refId="B8" refString="Jazdzewska, AM, Mamos, T, 2019. High species richness of Northwest Pacific deep-sea amphipods revealed through DNA barcoding. Progress in Oceanography 178: e102184. https://doi.org/10.1016/j.pocean.2019.102184" title="High species richness of Northwest Pacific deep-sea amphipods revealed through DNA barcoding. Progress in Oceanography 178: e 102184." url="https://doi.org/10.1016/j.pocean.2019.102184" year="2019">
|
|
<normalizedToken originalValue="Jażdżewska">Jazdzewska</normalizedToken>
|
|
and Mamos 2019
|
|
</bibRefCitation>
|
|
). Deep-sea amphipod species previously regarded as widely distributed have since been found to contain cryptic species (e.g.,
|
|
<bibRefCitation DOI="https://doi.org/10.1007/s12526-017-0758-4" author="Narahara-Nakano, Y" journalOrPublisher="Marine Biodiversity" pageId="0" pageNumber="115" pagination="603 - 620" refId="B13" refString="Narahara-Nakano, Y, Nakano, T, Tomikawa, K, 2018. Deep-sea amphipod genus Eurythenes from Japan, with a description of a new Eurythenes species from off Hokkaido (Crustacea: Amphipoda: Lysianassoidea). Marine Biodiversity 48: 603 - 620, DOI: https://doi.org/10.1007/s12526-017-0758-4" title="Deep-sea amphipod genus Eurythenes from Japan, with a description of a new Eurythenes species from off Hokkaido (Crustacea: Amphipoda: Lysianassoidea)." url="https://doi.org/10.1007/s12526-017-0758-4" volume="48" year="2018">Narahara-Nakano et al. 2018</bibRefCitation>
|
|
).
|
|
<bibRefCitation author="Loerz, AN" journalOrPublisher="Zoologica Baetica" pageId="0" pageNumber="115" pagination="65 - 84" refId="B12" refString="Loerz, AN, 2010. Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda). Zoologica Baetica 21: 65 - 84" title="Trench treasures: the genus Princaxelia (Pardaliscidae, Amphipoda)." volume="21" year="2010">
|
|
<normalizedToken originalValue="Lörz">Loerz</normalizedToken>
|
|
(2010)
|
|
</bibRefCitation>
|
|
also considered that
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
, as reported from multiple trenches by
|
|
<bibRefCitation author="Kamenskaya, OE" journalOrPublisher="Trudy Instituta Okeanologii" pageId="0" pageNumber="115" pagination="94 - 107" refId="B10" refString="Kamenskaya, OE, 1981. The amphipods (Crustacea) from deep-sea trenches in the western part of the Pacific Ocean. Trudy Instituta Okeanologii 115: 94 - 107" title="The amphipods (Crustacea) from deep-sea trenches in the western part of the Pacific Ocean." volume="115" year="1981">Kamenskaya (1981)</bibRefCitation>
|
|
, may contain other or undescribed species. It is possible that
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
and
|
|
<taxonomicName lsidName="P. jamiesoni" pageId="0" pageNumber="115" rank="species" species="jamiesoni">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. jamiesoni</emphasis>
|
|
</taxonomicName>
|
|
represent species complexes, but a greater understanding of species diversity of this hadal-dwelling genus will require additional genetic and morphological analyses.
|
|
</paragraph>
|
|
<caption doi="10.3897/zookeys.1015.59683.figure6" httpUri="https://binary.pensoft.net/fig/505322" pageId="0" pageNumber="115" start="Figure 6" startId="F6">
|
|
<paragraph pageId="0" pageNumber="115">
|
|
<emphasis bold="true" pageId="0" pageNumber="115">Figure 6.</emphasis>
|
|
Geographical distributions of the species of
|
|
<taxonomicName authorityName="Dahl" authorityYear="1959" class="Malacostraca" family="Pardaliscidae" genus="Princaxelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Princaxelia" order="Amphipoda" pageId="0" pageNumber="115" phylum="Arthropoda" rank="genus">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">Princaxelia</emphasis>
|
|
</taxonomicName>
|
|
(map data from
|
|
<bibRefCitation DOI="https://doi.org/10.5285/a29c5465-b138-234d-e053-6c86abc040b9" author="GEBCO Compilation Group" journalOrPublisher="Molecular Marine Biology and Biotechnology" pageId="0" pageNumber="115" refId="B6" refString="GEBCO Compilation Group, 2020. GEBCO 2020 Grid - a continuous terrain model of the global oceans and land. British Oceanographic Data Centre, National Oceanography Centre, NERC. https://doi.org/10.5285/a29c5465-b138-234d-e053-6c86abc040b9" title="GEBCO 2020 Grid - a continuous terrain model of the global oceans and land. British Oceanographic Data Centre, National Oceanography Centre, NERC." url="https://doi.org/10.5285/a29c5465-b138-234d-e053-6c86abc040b9" year="2020">GEBCO Compilation Group [2020]</bibRefCitation>
|
|
). The exact location of the distribution of
|
|
<taxonomicName lsidName="P. abyssalis" pageId="0" pageNumber="115" rank="species" species="abyssalis">
|
|
<emphasis italics="true" pageId="0" pageNumber="115">P. abyssalis</emphasis>
|
|
</taxonomicName>
|
|
in the Aleutian Trench is uncertain.
|
|
</paragraph>
|
|
</caption>
|
|
</subSubSection>
|
|
</treatment>
|
|
</document> |