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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.166.2313" ID-GBIF-Dataset="9771bfcf-4c41-4034-9b13-12b5db29d5c8" ID-PMC="PMC3272635" ID-Pensoft-Pub="1313-2970-166-1" ID-PubMed="22328858" ModsDocAuthor="" ModsDocDate="2012" ModsDocID="1313-2970-166-1" ModsDocOrigin="ZooKeys 166" ModsDocTitle="Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers" checkinTime="1451249369520" checkinUser="pensoft" docAuthor="White, Kristine N. &amp; Reimer, James Davis" docDate="2012" docId="5DC6A503C5F62796E0B87527742E2A45" docLanguage="en" docName="ZooKeys 166: 1-58" docOrigin="ZooKeys 166" docSource="http://dx.doi.org/10.3897/zookeys.166.2313" docTitle="Leucothoe nagatekubi White &amp; Reimer, 2012, sp. n." docType="treatment" docVersion="4" lastPageNumber="19" masterDocId="D95AFFA0FFAB5A6B44536464373AFFAC" masterDocTitle="Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers" masterLastPageNumber="58" masterPageNumber="1" pageNumber="17" updateTime="1668153192096" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>White, Kristine N.</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Reimer, James Davis</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2012</mods:date>
<mods:detail type="volume">
<mods:number>166</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>58</mods:end>
</mods:extent>
</mods:part>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.166.2313</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.166.2313</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-166-1</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="152033130" LSID="urn:lsid:zoobank.org:act:5416F771-FBE3-4D5F-A7A2-2D25A582ADA0" httpUri="http://treatment.plazi.org/id/5DC6A503C5F62796E0B87527742E2A45" lastPageId="18" lastPageNumber="19" pageId="16" pageNumber="17">
<subSubSection pageId="16" pageNumber="17" type="nomenclature">
<paragraph pageId="16" pageNumber="17">
<taxonomicName LSID="urn:lsid:zoobank.org:act:5416F771-FBE3-4D5F-A7A2-2D25A582ADA0" class="Malacostraca" family="Leucothoidae" genus="Leucothoe" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Leucothoe nagatekubi" order="Amphipoda" pageId="16" pageNumber="17" phylum="Arthropoda" rank="species" species="nagatekubi">Leucothoe nagatekubi</taxonomicName>
<taxonomicNameLabel pageId="16" pageNumber="17">sp. n.</taxonomicNameLabel>
Figures 1112
</paragraph>
</subSubSection>
<subSubSection lastPageId="17" lastPageNumber="18" pageId="16" pageNumber="17" type="type material">
<paragraph pageId="16" pageNumber="17">Type material.</paragraph>
<paragraph lastPageId="17" lastPageNumber="18" pageId="16" pageNumber="17">
Holotype male, 3.0 mm RUMF-ZC-1768, Mizugama,
<normalizedToken originalValue="Okinawajima">Okinawa-jima</normalizedToken>
Island, Okinawa, reef wall (
<geoCoordinate direction="north" orientation="latitude" precision="15" value="26.359722">26°21'35&quot;N</geoCoordinate>
,
<geoCoordinate direction="east" orientation="longitude" precision="15" value="127.73944">127°44'22&quot;E</geoCoordinate>
), in canals of orange encrusting
<pageBreakToken pageId="17" pageNumber="18" start="start">sponge</pageBreakToken>
,
<taxonomicName class="Demospongiae" family="Microcionidae" genus="Clathria" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Clathria" order="Poecilosclerida" pageId="17" pageNumber="18" phylum="Porifera" rank="genus">Clathria</taxonomicName>
of
<bibRefCitation pageId="17" pageNumber="18">Schmidt 1862</bibRefCitation>
, 10 m, N.S. White, col., 26 February 2011 (KNWOkinawa34K). Paratype female, 3.4 mm RUMF-ZC-1769, Mizugama, Okinawa reef wall (
<geoCoordinate direction="north" orientation="latitude" precision="15" value="26.359722">26°21'35&quot;N</geoCoordinate>
,
<geoCoordinate direction="east" orientation="longitude" precision="15" value="127.73944">127°44'22&quot;E</geoCoordinate>
), in canals of orange encrusting sponge,
<taxonomicName class="Demospongiae" family="Microcionidae" genus="Clathria" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Clathria" order="Poecilosclerida" pageId="17" pageNumber="18" phylum="Porifera" rank="genus">Clathria</taxonomicName>
, 7 m, N.S. White, col., 20 October 2011 (KNWOkinawa69D)
</paragraph>
</subSubSection>
<subSubSection pageId="17" pageNumber="18" type="type locality">
<paragraph pageId="17" pageNumber="18">Type locality.</paragraph>
<paragraph pageId="17" pageNumber="18">
Mizugama,
<normalizedToken originalValue="Okinawajima">Okinawa-jima</normalizedToken>
Island, Okinawa, Japan (
<geoCoordinate direction="north" orientation="latitude" precision="15" value="26.359722">26°21'35&quot;N</geoCoordinate>
,
<geoCoordinate direction="east" orientation="longitude" precision="15" value="127.73944">127°44'22&quot;E</geoCoordinate>
).
</paragraph>
</subSubSection>
<subSubSection pageId="17" pageNumber="18" type="additional material examined">
<paragraph pageId="17" pageNumber="18">Additional material examined.</paragraph>
<paragraph pageId="17" pageNumber="18">9 specimens, NSMT-Cr 21896, KNWOkinawa69B; 9 specimens, RUMF-ZC-1770, KNWOkinawa69C.</paragraph>
</subSubSection>
<subSubSection pageId="17" pageNumber="18" type="diagnosis (male)">
<paragraph pageId="17" pageNumber="18">Diagnosis (male).</paragraph>
<paragraph pageId="17" pageNumber="18">Head anterior margin truncate, anterodistal margin quadrate with cusp. Maxilla 1 palp 1-articulate. Maxilliped outer plate tuberculate with facial setae. Gnathopod 1 basis anterodistal margin with 7 very short, slender setae. Gnathopod 2 carpus elongate, distally tapered; propodus palm with large concavity. Pereopod 7 basis posteriorly serrate. Telson with plumose facial setae.</paragraph>
</subSubSection>
<subSubSection lastPageId="18" lastPageNumber="19" pageId="17" pageNumber="18" type="description">
<paragraph pageId="17" pageNumber="18">Description (male).</paragraph>
<paragraph pageId="17" pageNumber="18">
Head. Anterior margin truncate, anterodistal margin quadrate with cusp; ventral cephalic keel anterior margin transverse, anteroventral margin quadrate, ventral margin distally excavate, rounded; eyes with more than 10 ommatidia, round. Antenna 1 0.3
<normalizedToken originalValue="×">x</normalizedToken>
body length, flagellum 7-articulate, peduncle article 1 width less than 2
<normalizedToken originalValue="×">x</normalizedToken>
article 2, accessory flagellum 1-articulate. Antenna 2 0.3
<normalizedToken originalValue="×">x</normalizedToken>
body length, subequal in length with antenna 1, flagellum 4-articulate. Mandibular palp ratio of articles 1-3 1.0: 3.0: 1.7, article 2 with 2 medium distal setae, article 3 with 2 distal setae, incisors strongly dentate; left mandible with 5 raker spines, lacinia mobilis large, strongly toothed; right mandible with 7 raker spines, lacinia mobilis small, strongly dentate. Upper lip asymmetrically lobate, anterior margin setose. Lower lip inner lobes fused, bare; outer lobes with moderate gape, anterior margins setose. Maxilla 1 palp 1-articulate with 4 distal setae; outer plate with 5 distal robust setae. Maxilla 2 inner plate with 3 robust distal setae and 7 slender marginal setae; outer plate with 3 robust distal setae and 15 slender distal marginal setae. Maxilliped inner plates distal margin with a v-shaped indentation, with short robust setae; outer plate inner margin tuberculate, reaching 0.1
<normalizedToken originalValue="×">x</normalizedToken>
palp article 1, with simple marginal setae, facial setae present; palp article 4 subequal in length with article 3, distally acute.
</paragraph>
<paragraph lastPageId="18" lastPageNumber="19" pageId="17" pageNumber="18">
Pereon. Coxae 1-4 relative widths 1.0: 1.8: 1.1: 2.1. Gnathopod 1 coxa smooth, with tiny marginal setae, anterodistal margin produced, rounded with cusp, distal margin straight, posterior margin excavate, facial setae absent; basis linear, anterodistal margin with 7 very short, slender setae, posterior margin bare; ischium bare; carpus linear, distal length 13.1
<normalizedToken originalValue="×">x</normalizedToken>
width, proximal margin serrate, distal margin with 1 short seta; propodus straight, palm with 6 distal triangular teeth and 6 distal setae; dactylus smooth, reaching 0.1
<normalizedToken originalValue="×">x</normalizedToken>
propodus length. Gnathopod 2 coxa broader than long, subequal in size with coxa 3, smooth, with tiny marginal setae, anterior margin expanded anteriorly, anterodistally rounded, distal margin oblique, posterior margin straight, facial setae absent; basis distally expanded, anterior margin with 5 medium setae, distal margin with 2 setae, posterior margin with 3 setae; ischium with 3 posterior, 2 distal, and 3 posterodistal setae; carpus 0.5
<normalizedToken originalValue="×">x</normalizedToken>
propodus length, curved, distally tapered, anterior margin smooth; propodus with 1 mediofacial setal row above midline, reaching 0.8
<normalizedToken originalValue="×">x</normalizedToken>
propodus length, with 2 submarginal setae, posterior margin smooth, palm convex with 6 major tubercles and 1 major concavity; dactylus curved, proximal margin smooth with 1 seta, anterior margin distally acute, reaching 0.5
<normalizedToken originalValue="×">x</normalizedToken>
propodus length. Pereopod 3 coxa length
<pageBreakToken pageId="18" pageNumber="19" start="start">1.5</pageBreakToken>
<normalizedToken originalValue="×">x</normalizedToken>
width, anterodistal corner overriding distal face of coxa 2 and extending below it, smooth, with tiny marginal setae, anterior margin evenly rounded, distal margin oblique, posterior margin straight, facial setae absent. Pereopod 4 coxa smooth, with tiny marginal setae, anterior margin produced, distal margin evenly rounded, posterior margin tapered, facial setae absent. Pereopods 5-7 coxae facial setae absent; bases width length ratios 1: 1.3, 1: 1.3, 1: 1.2, posterior margins setose. Pereopods 5-6 bases posterior margins smooth, pereopod 7 basis posterior margin serrate.
</paragraph>
<paragraph pageId="18" pageNumber="19">
Pleon. Epimera 1 and 3 bare, epimeron 2 with ventral setae; epimeron 3 posteroventral corner rounded. Uropods 1-3 relative lengths 1.0: 0.7: 0.9. Uropod 1 peduncle and outer ramus subequal in length with inner ramus; inner ramus with 5 robust setae and outer ramus with 2 robust setae. Uropod 2 peduncle 0.9
<normalizedToken originalValue="×">x</normalizedToken>
inner ramus length, outer ramus 0.7
<normalizedToken originalValue="×">x</normalizedToken>
inner ramus length; inner ramus with 1 robust seta and outer ramus with 2 robust setae. Uropod 3 peduncle 1.6
<normalizedToken originalValue="×">x</normalizedToken>
inner ramus length, outer ramus 0.9
<normalizedToken originalValue="×">x</normalizedToken>
inner ramus length; inner ramus with 1 robust seta and outer ramus with 2 robust setae. Telson 2.3
<normalizedToken originalValue="×">x</normalizedToken>
longer than wide, with plumose facial setae, apex strongly tridentate.
</paragraph>
<paragraph pageId="18" pageNumber="19">Female (sexually dimorphic characters).</paragraph>
<paragraph pageId="18" pageNumber="19">Unknown.</paragraph>
<caption pageId="18" pageNumber="19">
<paragraph pageId="18" pageNumber="19">
Figure 11.
<taxonomicName class="Malacostraca" family="Leucothoidae" genus="Leucothoe" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Leucothoe nagatekubi" order="Amphipoda" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="nagatekubi">Leucothoe nagatekubi</taxonomicName>
sp. n., holotype male, 3.0 mm, RUMF-ZC-1768.
</paragraph>
</caption>
<caption pageId="18" pageNumber="19">
<paragraph pageId="18" pageNumber="19">
Figure 12.
<taxonomicName class="Malacostraca" family="Leucothoidae" genus="Leucothoe" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Leucothoe nagatekubi" order="Amphipoda" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="nagatekubi">Leucothoe nagatekubi</taxonomicName>
sp. n., holotype male, 3.0 mm, RUMF-ZC-1768; paratype female, 3.4 mm, RUMF-ZC-1769.
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="18" pageNumber="19" type="etymology">
<paragraph pageId="18" pageNumber="19">Etymology.</paragraph>
<paragraph pageId="18" pageNumber="19">
After the Japanese words
<normalizedToken originalValue="nagai">'nagai'</normalizedToken>
, meaning
<normalizedToken originalValue="long">'long'</normalizedToken>
, and
<normalizedToken originalValue="tekubi">'tekubi'</normalizedToken>
, meaning
<normalizedToken originalValue="wrist">'wrist'</normalizedToken>
and referring to the elongate carpus on gnathopod 2. (Pronounced na-ga-tay-koo-bee)
</paragraph>
</subSubSection>
<subSubSection pageId="18" pageNumber="19" type="ecology">
<paragraph pageId="18" pageNumber="19">Ecology.</paragraph>
<paragraph pageId="18" pageNumber="19">
In canals of orange encrusting sponge,
<taxonomicName class="Demospongiae" family="Microcionidae" genus="Clathria" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Clathria" order="Poecilosclerida" pageId="18" pageNumber="19" phylum="Porifera" rank="genus">Clathria</taxonomicName>
sp., RUMF-ZP-5, KNWOkianawa69G (Figure 25D), found in caves.
</paragraph>
</subSubSection>
<subSubSection pageId="18" pageNumber="19" type="relationships">
<paragraph pageId="18" pageNumber="19">Relationships.</paragraph>
<paragraph pageId="18" pageNumber="19">
<taxonomicName class="Malacostraca" family="Leucothoidae" genus="Leucothoe" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Leucothoe nagatekubi" order="Amphipoda" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="nagatekubi">Leucothoe nagatekubi</taxonomicName>
sp. n. is similar to
<taxonomicName class="Malacostraca" family="Leucothoidae" genus="Leucothoe" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Leucothoe serrata" order="Amphipoda" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="serrata">Leucothoe serrata</taxonomicName>
White &amp; Thomas, 2009 in having an elongate gnathopod 2 carpus, narrow gnathopod 1 propodus and carpus, high mediofacial setal row on gnathopod 2 propodus, and wide pereopod 5-7 bases. It differs in the large indentation on the gnathopod 2 propodus palm, having a 1-articulate accessory flagellum on antenna 1, triangular teeth on gnathopod 1 propodus palm, and a 1-articulate maxilla 1 palp.
</paragraph>
</subSubSection>
<subSubSection pageId="18" pageNumber="19" type="remarks">
<paragraph pageId="18" pageNumber="19">Remarks.</paragraph>
<paragraph pageId="18" pageNumber="19">
<taxonomicName class="Malacostraca" family="Leucothoidae" genus="Leucothoe" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Leucothoe nagatekubi" order="Amphipoda" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="nagatekubi">Leucothoe nagatekubi</taxonomicName>
sp. n. is pinkish-orange in color (Figure 24C). This species is endemic to the western coast of
<normalizedToken originalValue="Okinawajima">Okinawa-jima</normalizedToken>
Island, Okinawa.
</paragraph>
</subSubSection>
<subSubSection pageId="18" pageNumber="19" type="distribution">
<paragraph pageId="18" pageNumber="19">Distribution.</paragraph>
<paragraph pageId="18" pageNumber="19">
East China Sea:
<normalizedToken originalValue="Okinawajima">Okinawa-jima</normalizedToken>
Island, Okinawa, Japan.
</paragraph>
</subSubSection>
</treatment>
</document>