203 lines
22 KiB
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203 lines
22 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.620.9924" ID-GBIF-Dataset="9c2b523c-8eff-4e4c-a4ba-f64984998fc5" ID-PMC="PMC5102420" ID-Pensoft-Pub="1313-2970-620-21" ID-PubMed="27853405" ID-ZBK="002077ACA9FA4836B15F6D2761245CE5" ModsDocAuthor="" ModsDocDate="2016" ModsDocID="1313-2970-620-21" ModsDocOrigin="ZooKeys 620" ModsDocTitle="Mysidellahoshinoi, a new species from Izu-Oshima Island, Japan (Crustacea, Mysidae, Mysidellinae)" checkinTime="1475197448358" checkinUser="pensoft" docAuthor="Shimomura, Michitaka" docDate="2016" docId="06F54EADA5FC27AEEF19855A35349CEC" docLanguage="en" docName="ZooKeys 620: 21-32" docOrigin="ZooKeys 620" docSource="http://dx.doi.org/10.3897/zookeys.620.9924" docTitle="Mysidella hoshinoi Shimomura, 2016, sp. n." docType="treatment" docUuid="F7FEE4EB-48E9-4E4A-8AAA-6329D6197FFE" docUuidSource="ZooBank" docVersion="5" lastPageNumber="26" masterDocId="FFA9FFC6AD70FFB33330EA38FFF49B39" masterDocTitle="Mysidellahoshinoi, a new species from Izu-Oshima Island, Japan (Crustacea, Mysidae, Mysidellinae)" masterLastPageNumber="32" masterPageNumber="21" pageNumber="22" updateTime="1668163557227" 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>Mysidellahoshinoi, a new species from Izu-Oshima Island, Japan (Crustacea, Mysidae, Mysidellinae)</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>Shimomura, Michitaka</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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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>2016</mods:date>
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<mods:detail type="volume">
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<mods:number>620</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>21</mods:start>
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<mods:end>32</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.620.9924</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.620.9924</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-620-21</mods:identifier>
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<mods:identifier type="ZBK">002077ACA9FA4836B15F6D2761245CE5</mods:identifier>
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<mods:identifier type="ZooBank">002077ACA9FA4836B15F6D2761245CE5</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="127882935" LSID="urn:lsid:zoobank.org:act:F7FEE4EB-48E9-4E4A-8AAA-6329D6197FFE" httpUri="http://treatment.plazi.org/id/06F54EADA5FC27AEEF19855A35349CEC" lastPageId="5" lastPageNumber="26" pageId="1" pageNumber="22">
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<subSubSection pageId="1" pageNumber="22" type="multiple">
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<paragraph pageId="1" pageNumber="22">Taxon classification Animalia Mysida Mysidae</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="22" type="nomenclature">
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<paragraph pageId="1" pageNumber="22">
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<taxonomicName LSID="http://zoobank.org/F7FEE4EB-48E9-4E4A-8AAA-6329D6197FFE" class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="1" pageNumber="22" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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<taxonomicNameLabel pageId="1" pageNumber="22">sp. n.</taxonomicNameLabel>
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Figs 2, 3, 4, 5
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="22" type="materials_examined">
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<paragraph pageId="1" pageNumber="22">Material examined.</paragraph>
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<paragraph pageId="1" pageNumber="22">
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Holotype. Adult ♂ (4.0 mm) (KMNH IvR 500893),
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<geoCoordinate direction="north" orientation="latitude" precision="925" value="34.783333">34°47'N</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="925" value="139.4">139°24'E</geoCoordinate>
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, Akino-hama, Izu-Oshima Island, Sagami Sea, Japan, 23 August 2014, 35 m.
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</paragraph>
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<paragraph pageId="1" pageNumber="22">
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Paratypes. Adult ♀ (4.0 mm) (KMNH IvR 500894), immature ♀ (3.0 mm) (KMNH IvR 500895), immature ♂ (3.1 mm) (KMNH IvR500896), data same as holotype; adult ♀ (3.4 mm) (KMNH IvR 500897), immature ♀ (3.0 mm) (KMNH IvR 500898), immature ♂ (2.7 mm) (KMNH IvR 500899),
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<geoCoordinate direction="north" orientation="latitude" precision="925" value="34.783333">34°47'N</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="925" value="139.4">139°24'E</geoCoordinate>
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,Akino-hama, Izu-Oshima Island, Tokyo, Japan, 16 August 2014, 35 m.
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="2" lastPageNumber="23" pageId="1" pageNumber="22" type="diagnosis">
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<paragraph pageId="1" pageNumber="22">Diagnosis.</paragraph>
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<paragraph lastPageId="2" lastPageNumber="23" pageId="1" pageNumber="22">
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Eyestalk with posterodorsal finger-like papilla; carpopropodus of endopod of first thoracopod with five peculiar spines terminating in plumed seta on outer margin; terminal claw of carpopropodus of endopod of first thoracopod
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<pageBreakToken pageId="2" pageNumber="23" start="start">with</pageBreakToken>
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one short seta and suture distinct; uropodal endopod with 27 spines on inner margin.
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="4" lastPageNumber="25" pageId="2" pageNumber="23" type="description">
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<paragraph pageId="2" pageNumber="23">Description of the holotype.</paragraph>
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<paragraph pageId="2" pageNumber="23">Carapace (Fig. 2A): anterior margin produced into short rounded rostral plate and covering basal part of eyestalks; anterolateral corner produced; posterior margin emarginated, leaving last thoracic somite exposed. Eye (Fig. 2A, C) developed; cornea well-pigmented, globular, wider than eyestalk, occupying nearly half of eye; eyestalk with posterodorsal finger-like papilla.</paragraph>
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<caption pageId="2" pageNumber="23">
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<paragraph pageId="2" pageNumber="23">
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Figure 1.
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="2" pageNumber="23" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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sp. n., sex unknown, on a tentacle of a sea anemone (family
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<taxonomicName family="Haloclavidae" lsidName="" pageId="2" pageNumber="23" rank="family">Haloclavidae</taxonomicName>
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), Akino-hama, Izu-Oshima Island, Sagami Sea, Japan, 25 March 2016, 35 m depth, habitus in situ, photographed by O. Hoshino.
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</paragraph>
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</caption>
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<caption pageId="2" pageNumber="23">
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<paragraph pageId="2" pageNumber="23">
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Figure 2.
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="2" pageNumber="23" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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sp. n., A, C, D, G, H, J holotype male B, E, I paratype female (KMNH IvR 500894) F paratype female (KMNH IvR 500895): A, B anterior part of head, dorsal C right eye, dorsal
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<normalizedToken originalValue="D–F">D-F</normalizedToken>
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telson, dorsal G telson and left uropod, ventral H, I basal part of right antennula, dorsal J basal part of right antenna, dorsal. Scale bars: 500
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="2" pageNumber="23">Antennula (Fig. 2A, H): first segment of antennular peduncle longest, 1.3 times as long as third article, with anterolateral corner produced laterally and tipped with three plumose setae, and with two short projections anterodorsally bearing some plumose setae apically; second article shortest, with short projection anterodorsally bearing four plumose setae apically and one simple seta distomedially; third article slightly wider than long, small appendix masculina on ventral side, with short projection anterodorsally bearing some short stout setae and two plumose setae apically, and with six simple setae distomedially.</paragraph>
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<paragraph pageId="2" pageNumber="23">Antenna (Fig. 2A, J): antennal scale setose all round, extending beyond distal margin of antennular peduncle for 0.3 of its length, 3.2 times as long as width, distal suture distinct; outer margin slightly concave; inner margin convex. Antenna peduncle 3-articlulate: first segment shortest; second and third segments subequal in length.</paragraph>
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<paragraph pageId="3" pageNumber="24">
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<pageBreakToken pageId="3" pageNumber="24" start="start">Labrum</pageBreakToken>
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(Fig. 3A) rounded apically, produced posteriorly into two unequal lobes; right lobe broadly rounded posteriorly, with fine teeth on margin; left lobe smaller; both lobes with fine teeth on posterior margin.
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</paragraph>
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<caption pageId="3" pageNumber="24">
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<paragraph pageId="3" pageNumber="24">
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Figure 3.
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="3" pageNumber="24" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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sp. n., holotype male: A labrum ventral B left mandible, dorsal C right mandible, ventral D left maxillula, dorsal E left maxilla, dorsal F right first thoracopod, dorsal G peculiar spines on outer margin of carpopropodus of endopod of first thoracopod H right second thoracopod, lateral. Scale bars: 500
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="3" pageNumber="24">Left mandible (Fig. 3B) without teeth; molar portion trapezoidal; first article of mandibular palp shortest; second article longest, with seven setulate setae distally; third article slightly curved, with several setae. Right mandible (Fig. 3C) without teeth and molar portion, slightly curved medially, mandibular palp similar in shape than the left one.</paragraph>
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<paragraph pageId="3" pageNumber="24">Maxillula (Fig. 3D): inner lobe broad, 2.6 times as wide as outer lobe, with three plumose and one simple setae; outer lobe with 12 stout setae distally.</paragraph>
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<paragraph pageId="3" pageNumber="24">Maxilla (Fig. 3E): exopod with nine plumose setae on margin; first article of endopod with two plumose setae distally; second article with many plumose and some simple setae on margin; bilobulate basal endites each with ten plumose setae distally; coxal endite with six plumose setae distally and four plumose setae medially.</paragraph>
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<paragraph pageId="3" pageNumber="24">Endopod of first thoracopod (Fig. 3F) robust: basis with two plumose setae; preischium triangular, with four plumose setae distally; ischium 1.1 times as long as basis, with five plumose setae distally; merus 0.6 times as long as ischium, with two plumose setae and one simple seta; carpopropodus 1.4 times as long as merus, twice as long as width, with five peculiar spines (Fig. 3G) terminating in plumed seta on outer margin; terminal claw nearly straight, 1.1 times as long as carpopropodus, with one short setae, suture distinct.</paragraph>
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<paragraph pageId="3" pageNumber="24">Endopod of second thoracopod (Fig. 3H): ischium 0.8 times as long as basis; merus longest, 1.6 times as long as ischium; carpopropodus 0.7 times as long as merus, with two rows of setae distally; dactylus small, with one long, setulate seta apically and several short setae. Endopod of third thoracopod (Fig. 4A): preischium trapezoidal; ischium 3.0 times as long as preischium; merus 1.1 times as long as ischium; carpopropodus divided into two subsegments, 0.8 times as long as merus; dactylus small, with strong terminal claw. Endopod of fourth thoracopod (Fig. 4B): preischium trapezoidal; ischium 3.0 times as long as preischium; merus 0.9 times as long as ischium; carpopropodus divided into two subsegments, 0.7 times as long as merus; dactylus small, with strong terminal claw. Endopod of fifth thoracopod (Fig. 4C): preischium triangular; ischium 6.1 times as long as preischium; merus half as long as ischium; carpopropodus divided into three subsegments, 0.8 times as long as merus; dactylus small, with strong terminal claw. Endopod of sixth thoracopod (Fig. 4D): preischium triangular; ischium 5.7 times as long as preischium; merus half as long as ischium; carpopropodus divided into three subsegments, 0.8 times as long as merus; dactylus small, with strong terminal claw. Endopod of seventh thoracopod (Fig. 4E): preischium triangular; ischium 4.2 times as long as preischium; merus 0.7 as long as ischium; carpopropodus divided into three subsegments, 0.8 times as long as merus; dactylus small, with strong terminal claw. Endopod of eighth thoracopod (Fig. 4F): preischium triangular; ischium 3.9 times as long as preischium; merus 0.7 as long as ischium; carpopropodus divided into three subsegments, 0.8 times as long as merus; dactylus small, with strong terminal claw.</paragraph>
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<caption pageId="3" pageNumber="24">
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<paragraph pageId="3" pageNumber="24">
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Figure 4.
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="3" pageNumber="24" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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sp. n., holotype male: A left third thoracopod, lateral B left fourth thoracopod C left fifth thoracopod, lateral D left sixth thoracopod, lateral E left seventh thoracopod, lateral F left eighth thoracopod, lateral G left penis, ventral. Scale bar: 500
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="4" pageNumber="25">
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<pageBreakToken pageId="4" pageNumber="25" start="start">Exopod</pageBreakToken>
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of first thoracopod with 8-segmented flagellum. Exopods of second to seventh thoracopods (Figs 3H, 4
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<normalizedToken originalValue="A–E">A-E</normalizedToken>
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) similar in shape and size, with 7-segmeted flagellum; basal plate with rounded outer corner. Exopod of eighth thoracopod (Fig. 4F) with 7-segmented flagellum; basal plate narrower than those of anterior six thoracopods.
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</paragraph>
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<paragraph pageId="4" pageNumber="25">Penis (Fig. 4G) cylindrical, 6.2 times as long as width, without setae.</paragraph>
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<paragraph pageId="4" pageNumber="25">Abdomen: first four somites decreasing in length posteriorly; second and fifth segments subequal in length; sixth somite 1.3 times as long as fifth somite.</paragraph>
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<paragraph pageId="4" pageNumber="25">
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All pleopods (Fig. 5
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<normalizedToken originalValue="A–E">A-E</normalizedToken>
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) reduced to unsegmented lobe, not modified. First pleopod as long as second pleopod; second pleopod to fifth pleopod increasing in length; fifth pleopod 1.3 times as long as fourth pleopod.
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</paragraph>
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<caption pageId="4" pageNumber="25">
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<paragraph pageId="4" pageNumber="25">
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Figure 5.
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="4" pageNumber="25" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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sp. n.,
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<normalizedToken originalValue="A–E">A-E</normalizedToken>
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holotype male F paratype female (KMNH IvR 500894): A left first pleopod, ventral B left second pleopod, ventral C left third pleopod, ventral D left fourth pleopod, ventral E left fifth pleopod, ventral F left first pleopod, ventral. Scale bar 100
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="4" pageNumber="25">Uropod (Fig. 2G): endopod of uropod extending to apex of apical spines of telson, 2.1 times as long as width, with large statolith and 27 spines on inner margin; exopod of uropod 3.9 times as long as width.</paragraph>
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<paragraph pageId="4" pageNumber="25">Telson (Fig. 2D) tapering posteriorly, 1.3 as long as maximum width; lateral margins each with three pairs of anterior spiniform setae, seven posterior spiniform setae on left side and six posterior spiniform setae on right side, and three pairs of terminal spiniform setae; cleft shallow and narrow, 0.08 times as deep as telson length, with six short spines on margin.</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="25" type="description">
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<paragraph pageId="4" pageNumber="25">Description of the paratype female</paragraph>
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<paragraph pageId="4" pageNumber="25">(KMNH IvR 500894).Antennula (Fig. 2B, I): first segment of antennular peduncle as long as third article, with anterolateral corner produced laterally and tipped with three plumose setae, and with two short projections anterodorsally bearing some plumose setae apically; second article shortest, with short projection anterodorsally bearing four plumose setae apically and one plumose and one simple setae distomedially; third article slightly wider than long, with short projection anterodorsally bearing some short stout setae and two plumose setae apically, and with two plumose setae medially and six simple setae distomedially.</paragraph>
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<paragraph pageId="4" pageNumber="25">All thoracopods and pleopods (Fig. 5F) similar to holotype male in morphology and chaetotaxy.</paragraph>
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<paragraph pageId="4" pageNumber="25">Telson (Fig. 2E): lateral margins each with two pairs of anterior, six pairs of posterior and three pairs of terminal spiniform setae; cleft with four spines on margin.</paragraph>
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<paragraph pageId="4" pageNumber="25">
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<taxonomicName class="Magnoliopsida" family="Fabaceae" genus="Marsupium" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Marsupium" order="Fabales" pageId="4" pageNumber="25" phylum="Tracheophyta" rank="genus">Marsupium</taxonomicName>
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composed of two pairs of developed oostegites on seventh and eighth thoracopods.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="25" type="variation">
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<paragraph pageId="4" pageNumber="25">Variation.</paragraph>
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<paragraph pageId="4" pageNumber="25">Some variations (N = 7: holotype and 6 paratypes) were recognized in the number of spiniform setae on telson (Fig. 2F). Lateral margins each with two or three pairs of anterior, four to seven pairs of posterior spiniform setae; cleft with one to four spines on margin.</paragraph>
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</subSubSection>
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<subSubSection pageId="4" pageNumber="25" type="color in life">
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<paragraph pageId="4" pageNumber="25">Color in life.</paragraph>
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<paragraph pageId="4" pageNumber="25">Body (Fig. 1) dark to light read, with or without light brownish marbled pattern. Cornea of eye light orange; posterodorsal finger-like papilla on the eyestalk white. Antennular flagella transparent with white and red stripes.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="5" lastPageNumber="26" pageId="4" pageNumber="25" type="distribution">
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<paragraph pageId="4" pageNumber="25">Distribution and habitat.</paragraph>
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<paragraph lastPageId="5" lastPageNumber="26" pageId="4" pageNumber="25">
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The new species has so far been found only the type locality, 35 m depth, Akino-hama, Izu-Oshima Island, Sagami Sea, central Japan. According
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<pageBreakToken pageId="5" pageNumber="26" start="start">to</pageBreakToken>
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the sampling notes by Mr. O. Hoshino, a number of individuals hovered above and around oral disc and tentacles of
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<taxonomicName family="Haloclavidae" lsidName="" pageId="5" pageNumber="26" rank="family">Haloclavidae</taxonomicName>
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sp. at the bottom. The mysids sometimes perched on the tentacles of the sea anemone. The new species live in ectocommensal association with sea anemones of the family.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="5" pageNumber="26" type="remarks">
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<paragraph pageId="5" pageNumber="26">Remarks.</paragraph>
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<paragraph pageId="5" pageNumber="26">
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="5" pageNumber="26" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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sp. n. differs from all the congeners in having a posterodorsal finger-like papilla on the eyestalk.
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</paragraph>
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<paragraph pageId="5" pageNumber="26">
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The arrangement of the spines of the telson links the new species to
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella incisa" order="Mysida" pageId="5" pageNumber="26" phylum="Arthropoda" rank="species" species="incisa">Mysidella incisa</taxonomicName>
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Wang, 1998, from the northern area of the South China Sea (Wang, 1998) and the Timor Sea (Murano, 2002).
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella hoshinoi" order="Mysida" pageId="5" pageNumber="26" phylum="Arthropoda" rank="species" species="hoshinoi">Mysidella hoshinoi</taxonomicName>
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is distinguished from
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella incisa" order="Mysida" pageId="5" pageNumber="26" phylum="Arthropoda" rank="species" species="incisa">Mysidella incisa</taxonomicName>
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by the following characters (those of
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<taxonomicName class="Malacostraca" family="Mysidae" genus="Mysidella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysidella incisa" order="Mysida" pageId="5" pageNumber="26" phylum="Arthropoda" rank="species" species="incisa">Mysidella incisa</taxonomicName>
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in parentheses): cornea occupying nearly half of eye (nearly one third); eyestalk with posterodorsal finger-like papilla (without papilla); uropodal endopod 2.1 times as long as width (2.5-2.7 times as long as width), with 27 spines on inner margin (with 22-24 spines).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="5" pageNumber="26" type="etymology">
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<paragraph pageId="5" pageNumber="26">Etymology.</paragraph>
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<paragraph pageId="5" pageNumber="26">This species is named after Mr. O. Hoshino, who gave me the present material for taxonomic study. The specific name thus is a noun in the genitive singular.</paragraph>
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</subSubSection>
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</treatment>
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</document> |