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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.1195.114209" ID-Pensoft-Pub="1313-2970-1195-121" ID-Pensoft-UUID="AAA7A052EDDA5E098039F89979E569E2" ID-ZooBank="153B616F03404CBBBFA66A67A2A0BA6A" ModsDocID="1313-2970-1195-121" checkinTime="1710460039362" checkinUser="pensoft" docAuthor="Wang, Yanrong, Sha, Zhongli &amp; Ren, Xianqiu" docDate="2024" docId="A02DE78F014D59BFAAD3175D6D33E819" docLanguage="en" docName="ZooKeys 1195: 121-130" docOrigin="ZooKeys 1195" docPubDate="2024-03-14" docSource="http://dx.doi.org/10.3897/zookeys.1195.114209" docTitle="Stegocephalus carolus Wang &amp; Sha &amp; Ren 2024, sp. nov." docType="treatment" docUuid="35CA4012-7AB1-4E86-BBC4-51A5B05F6EB2" docUuidSource="ZooBank" docVersion="1" id="AAA7A052EDDA5E098039F89979E569E2" lastPageNumber="121" masterDocId="AAA7A052EDDA5E098039F89979E569E2" masterDocTitle="One new species of Stegocephalus Kroyer, 1842 (Amphipoda, Stegocephalidae) described from a seamount of the Caroline Plate, NW Pacific" masterLastPageNumber="130" masterPageNumber="121" pageNumber="121" updateTime="1710460039362" updateUser="pensoft">
<mods:mods id="E770D285B50189856725142692AB0C20" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="3F75A2D6545DBB8514135129C84420BE">
<mods:title id="7EB1A2C3B02ED65EB0BFEBF63A93F37F">One new species of Stegocephalus Kroyer, 1842 (Amphipoda, Stegocephalidae) described from a seamount of the Caroline Plate, NW Pacific</mods:title>
</mods:titleInfo>
<mods:name id="35AAD894C94826E40F87A4E7B9F7B7B3" type="personal">
<mods:role id="3DF878862A09D8E981DFC3B01F6E3DC6">
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</mods:role>
<mods:namePart id="000872605652B963A7243DAE425C480F">Wang, Yanrong</mods:namePart>
<mods:nameIdentifier id="50AD7D816B1B0F1D6F5100F035C27212" type="ORCID">https://orcid.org/0000-0002-7188-4232</mods:nameIdentifier>
<mods:affiliation id="2B6B39D61C3AE9CA50E54C27FD952881">Department of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China &amp; College of Biological Sciences, University of Chinese Academy of Sciences, Beijing 100049, China</mods:affiliation>
</mods:name>
<mods:name id="5C27590B4F65588C4585D5C09EC52DCC" type="personal">
<mods:role id="5F60D3EB4B76EC157770A1D04068EF25">
<mods:roleTerm id="E39B144BD13CDCC9AEE7D552A6267C99">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="774EDFD5756E53C0F9FFBFE60DA6034F">Sha, Zhongli</mods:namePart>
<mods:nameIdentifier id="CD498BC72409069C65F9DAC1595EA1B5" type="ORCID">https://orcid.org/0000-0002-2192-3758</mods:nameIdentifier>
<mods:affiliation id="8DB538EFBB997FAAB175E6B49D65EA96">Department of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China &amp; College of Biological Sciences, University of Chinese Academy of Sciences, Beijing 100049, China &amp; Laoshan Laboratory, Qingdao 266237, China</mods:affiliation>
<mods:nameIdentifier id="7E2EB6663D2D7CD2B701E674552A5145" type="email">shazl@qdio.ac.cn</mods:nameIdentifier>
</mods:name>
<mods:name id="E7AB30DD23F9C946EFE86D8DC3320669" type="personal">
<mods:role id="8517038615EED6F4D74D9FAD3E458215">
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</mods:role>
<mods:namePart id="83C4B8D485093ADDD6BE9D0F28106161">Ren, Xianqiu</mods:namePart>
<mods:nameIdentifier id="B800015257F478D0A663B7AEB4358401" type="ORCID">https://orcid.org/0009-0003-4119-397X</mods:nameIdentifier>
<mods:affiliation id="DF0FA4CBE0EAC0194494191A2A1515BC">Department of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China</mods:affiliation>
</mods:name>
<mods:typeOfResource id="7FF50E8908980DF2C2C980BCD8D8DDF3">text</mods:typeOfResource>
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<mods:title id="283C6EB348D32A6DF0E640EDFB375964">ZooKeys</mods:title>
</mods:titleInfo>
<mods:part id="71E760C4C7789278214F46A367372851">
<mods:date id="36B9E227C0F34B4917A17895B4788584">2024</mods:date>
<mods:detail id="A281B961C7E48532F89C685A97F11099" type="pubDate">
<mods:number id="C4693D404EF68494BDB273435D853FA6">2024-03-14</mods:number>
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<mods:detail id="20C86FD983E441BB441E922C5720D15E" type="volume">
<mods:number id="8336C2E29D4373426F77923394D515FB">1195</mods:number>
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<mods:start id="D44C78A250A60CC1C20C88590EE975F4">121</mods:start>
<mods:end id="7F538E1F2F6FB6F3070B4FBED8195A13">130</mods:end>
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<mods:location id="E5567630830497209AF50E85900E04B7">
<mods:url id="46D8BE0477D430D1ACD01B90C8A2C877">http://dx.doi.org/10.3897/zookeys.1195.114209</mods:url>
</mods:location>
<mods:classification id="DCC131828EB24F1CF3052B7A1D022E99">journal article</mods:classification>
<mods:identifier id="B557597EE073CA26BF9DE911A6AC3683" type="DOI">http://dx.doi.org/10.3897/zookeys.1195.114209</mods:identifier>
<mods:identifier id="DE065CA49B6AD8F26D97F501E385DABA" type="Pensoft-Pub">1313-2970-1195-121</mods:identifier>
<mods:identifier id="C69EF6DFC3C19152ED29331B642780E8" type="ZooBank">153B616F03404CBBBFA66A67A2A0BA6A</mods:identifier>
<mods:identifier id="EEF62A4B9DEFD9135CF9EEE59BC36FAB" type="Pensoft-UUID">AAA7A052EDDA5E098039F89979E569E2</mods:identifier>
</mods:mods>
<subSection id="D20D63731593566EF1C916F402D2AB05" pageId="0" pageNumber="121" type="systematics">
<treatment id="A02DE78F014D59BFAAD3175D6D33E819" LSID="urn:lsid:zoobank.org:act:35CA4012-7AB1-4E86-BBC4-51A5B05F6EB2" httpUri="http://treatment.plazi.org/id/A02DE78F014D59BFAAD3175D6D33E819" lastPageNumber="121" pageId="0" pageNumber="121">
<subSubSection id="9AA19C1CF20F40468286B7453114435E" pageId="0" pageNumber="121" type="nomenclature">
<paragraph id="5582D0AD8A36A64F55C1D43C3FE2F65F" pageId="0" pageNumber="121">
<taxonomicName id="637AF1DCF6DF5FE7F352F50BFCC02238" LSID="https://zoobank.org/35CA4012-7AB1-4E86-BBC4-51A5B05F6EB2" authority="Wang &amp; Sha &amp; Ren, 2024" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus" status="sp. nov.">Stegocephalus carolus</taxonomicName>
<taxonomicNameLabel id="916CB12FD86172F4D864ED764AEEA42F" pageId="0" pageNumber="121">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="4B0720AED045BE09580B2B1B35ECA45B" pageId="0" pageNumber="121" type="description">
<paragraph id="CD8AC8B0BA5E84FC0F94EF0C41DDBD6B" pageId="0" pageNumber="121">
<figureCitation id="467D830995F02110E097F072B4097CA1" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Stegocephalus carolus sp. nov., MBM 286610, holotype, ♀ (8.9 mm): G 1 R, right gnathopod 1; G 2 R, right gnathopod 2." figureDoi="10.3897/zookeys.1195.114209.figure2" httpUri="https://binary.pensoft.net/fig/1001335" pageId="0" pageNumber="121">Figs 2</figureCitation>
<figureCitation id="0749A6E42EACC5BFEBE101D6CC583DA7" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Stegocephalus carolus sp. nov., MBM 286610, holotype, ♀ (8.9 mm): H, head; A 1, antenna 1; A 2, antenna 2; UL, upper lip; LL, lower lip; Md L, left mandible; Md R, right mandible; Mx 1, maxilla 1; Mx 2, maxilla 2; Mxp, maxilliped." figureDoi="10.3897/zookeys.1195.114209.figure3" httpUri="https://binary.pensoft.net/fig/1001336" pageId="0" pageNumber="121">, 3</figureCitation>
<figureCitation id="DA68D855F664ACF1BEEF53B607F1F8B2" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Stegocephalus carolus sp. nov., MBM 286610, holotype, ♀ (8.9 mm): P 3 R, right pereopod 3; P 4 R, right pereopod 4; P 5 R, right pereopod 5; P 6 R, right pereopod 6; P 7 R, right pereopod 7; U 1 R, right uropod 1; U 2 L, left uropod 2; U 3 L, left uropod 3; T, telson." figureDoi="10.3897/zookeys.1195.114209.figure4" httpUri="https://binary.pensoft.net/fig/1001337" pageId="0" pageNumber="121">, 4</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="331689854CE89B3B0D1627F228E3FD11" pageId="0" pageNumber="121" type="materials_examined">
<paragraph id="57992D5BDC3A8C6FD7158BC92D2BB966" pageId="0" pageNumber="121">Material examined.</paragraph>
<paragraph id="EF3B6868FF912D61CEE6499FB5E41437" pageId="0" pageNumber="121">
<emphasis id="4BC76C385E06A5982631D5FAEA493D9B" bold="true" pageId="0" pageNumber="121">
<emphasis id="7A31C9C77EF8CCD5B2B57B6C954BB1F8" italics="true" pageId="0" pageNumber="121">
<typeStatus id="788A0AC2213F61CBCD9F8D099B5FB5C6" type="holotype">Holotype</typeStatus>
</emphasis>
.
</emphasis>
MBM 286610,
<specimenCount id="A16470F81FCB4C62599C8570B105380C" count="1" type="female">♀</specimenCount>
(8.9 mm, with 6 big yolks), dissected, unnamed seamount on Caroline Plate, NW Pacific, M5173,
<geoCoordinate id="60873739C0E666D402656F6AD71DD84A" degrees="10" direction="north" minutes="03" orientation="latitude" precision="925" value="10.05">10°03′N</geoCoordinate>
,
<geoCoordinate id="49EE06C220811399ED3611518B70E85B" degrees="140" direction="east" minutes="10" orientation="longitude" precision="925" value="140.16667">140°10′E</geoCoordinate>
, depth
<quantity id="BF30E26A628DBC4343FC42823B3C4A70" metricMagnitude="3" metricUnit="m" metricValue="1.2209999999999999" unit="m" value="1221.0">1221 m</quantity>
,
<date id="F460EF1648DC90659A1BBE1431588BFE" value="2019-05-30">30 May 2019</date>
.
<emphasis id="25E551E8E501BF62C353B62660C0CB3D" bold="true" italics="true" pageId="0" pageNumber="121">
<typeStatus id="05F5890E9BD472A40E9EB2A63B43BE22" type="paratype">Paratypes</typeStatus>
</emphasis>
: MBM 287879,
<specimenCount id="622C6F8AC90D79C56BA69FEC6823B5B7" count="2" type="male">2♂</specimenCount>
(6.0 and 7.0 mm), not dissected, unnamed seamount on Caroline Plate, NW Pacific, M5117,
<geoCoordinate id="E2F90B4E2A43CD72D446139B9969CA09" degrees="10" direction="north" minutes="04" orientation="latitude" precision="925" value="10.066667">10°04′N</geoCoordinate>
,
<geoCoordinate id="CA65FF7B6B0074BF30B3ABAEE78F1526" degrees="140" direction="east" minutes="12" orientation="longitude" precision="925" value="140.2">140°12′E</geoCoordinate>
, depth
<quantity id="BF757A464BE2AB30EC0E586E21F738B9" metricMagnitude="2" metricUnit="m" metricValue="9.07" metricValueMax="9.44" metricValueMin="8.7" unit="m" value="907.0" valueMax="944.0" valueMin="870.0">870-944 m</quantity>
,
<date id="F3BB8F327314BC041CCD1DD8E7CDBBD0" value="2019-05-28">28 May 2019</date>
; MBM 287878,
<specimenCount id="4F298FE891C7D6D5D4B4BAE6E0020CC9" count="2" type="male">2♂</specimenCount>
(7.6 and 3.4 mm), not dissected, unnamed seamount on Caroline Plate, NW Pacific, M5362,
<geoCoordinate id="5E6AFE61DD9B6A7DBF53063444C29AB8" degrees="10" direction="north" minutes="04" orientation="latitude" precision="925" value="10.066667">10°04′N</geoCoordinate>
,
<geoCoordinate id="EC92DD6F3726089DFE1A11CF3D78DD6B" degrees="140" direction="east" minutes="11" orientation="longitude" precision="925" value="140.18333">140°11′E</geoCoordinate>
, depth
<quantity id="B02B80A4E302E95F78F750C858C4202C" metricMagnitude="2" metricUnit="m" metricValue="9.975" metricValueMax="11.82" metricValueMin="8.129999999999999" unit="m" value="997.5" valueMax="1182.0" valueMin="813.0">813-1182 m</quantity>
,
<date id="7F488CDC735FDFF8957AE62C0B8AEF1E" value="2019-06-02">2 June 2019</date>
.
</paragraph>
</subSubSection>
<subSubSection id="43D482BA2B3C0B55225CCEE00C1EB6D5" pageId="0" pageNumber="121" type="description">
<paragraph id="7DC57D20929CA815650BF328545EDA80" pageId="0" pageNumber="121">Description.</paragraph>
<paragraph id="04A21106EF195D2891DFE4106FD2A42C" pageId="0" pageNumber="121">First pereon segment longer than the rest; pleonite 1-3 dorsally smooth; epimeral plate 1 with posteroventral corner broadly rounded; epimeral plate 2 with posteroventral corner subacute; epimeral plate 3 without minute serration at posteroventral corner, posteroventral corner strongly produced, triangular. Head partially covered by pereonite 1 and coxa 1; much deeper than long. Rostrum absent. Eyes not apparent in ethanol-fixed material. Antenna 1 with callynophore well developed; peduncle about twice as long as first primary flagellar article; article 1 slightly longer than articles 1-2 combined; primary flagellum 7-articulate, article 1 longest; accessory flagellum 1-articulate, beyond article 1 of primary flagellum, bearing long setae apically. Antenna 2 slightly longer than antenna 1, peduncle (articles 3-5) slightly shorter than flagellum, article 4 longer than article 5, not setose; flagellum 12 articles, article 1 longer than rest of articles.</paragraph>
<caption id="8FAA3F80C85179F5886E38F141CC7C9C" doi="10.3897/zookeys.1195.114209.figure2" httpUri="https://binary.pensoft.net/fig/1001335" pageId="0" pageNumber="121" start="Figure 2" startId="F2">
<paragraph id="3E2093F14B38D920377C9F3A54FFBE15" pageId="0" pageNumber="121">
<emphasis id="28A43E9CAEFC801A5AE307CD4F22D104" bold="true" pageId="0" pageNumber="121">Figure 2.</emphasis>
<taxonomicName id="0CDBE294638223960FD96B01EC0C1F72" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="0091CC1C40C56B7FFE81F71A0629F4E1" italics="true" pageId="0" pageNumber="121">Stegocephalus carolus</emphasis>
</taxonomicName>
sp. nov., MBM 286610, holotype, ♀ (8.9 mm): G1 R, right gnathopod 1; G2 R, right gnathopod 2.
</paragraph>
</caption>
<paragraph id="976FCD749AE74EBE03DAA96BFB763A17" pageId="0" pageNumber="121">
<emphasis id="0DF492416DE492407FB3199D6523F101" bold="true" pageId="0" pageNumber="121">
<emphasis id="6708EEE010D59CBD1655D19BD46F4220" italics="true" pageId="0" pageNumber="121">Mouthparts</emphasis>
.
</emphasis>
Epistomal plate absent. Upper lip broader than long, bilobate, slightly asymmetrical. Lower lip with the narrow lobes bearing row of simple setae. Right Mandible incisor with 9 teeth; incisor of left mandible with 7 teeth, left lacinia mobilis with 9 teeth. Maxilla 1 palp 2-articulate, rectangular, apex not reaching above the apex of outer plate, apically bearing 4 plumose setae; outer plate with 9 setal-teeth arranged in a pseudocrown; inner plate with a well-developed shoulder, setae pappose. Maxilla 2 gaping and geniculate; outer plate with about 10 apical setae bearing distal hooks; inner plate with marginal and submarginal setae pappose. Maxilliped with inner plate subrectangular, not exceeding base of palp article 2, distal margin slightly concave, setose, medial setae-row present; outer plate only with inner margin bearing about 7 small robust setae; palp 4-articulate, article 2 distinctly shorter than article 1, inner margin produced distally, dactylus short, about 1/5 length of article 3.
</paragraph>
<paragraph id="153D25C876B68ABC2C5EE48A6DFA9955" pageId="0" pageNumber="121">Gills present on coxae 2-7. Oostegites present on 2-5.</paragraph>
<caption id="78B52CA24450476C21554473C40FBBE3" doi="10.3897/zookeys.1195.114209.figure3" httpUri="https://binary.pensoft.net/fig/1001336" pageId="0" pageNumber="121" start="Figure 3" startId="F3">
<paragraph id="83673FAB826644F9FA984FB1778B5625" pageId="0" pageNumber="121">
<emphasis id="2F5F08289FAD42D238E9CDCC49C8405C" bold="true" pageId="0" pageNumber="121">Figure 3.</emphasis>
<taxonomicName id="275368AAFD8C4101A7F15333CA911AE5" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="B64D3A505861384CE3479EB7C837F0C1" italics="true" pageId="0" pageNumber="121">Stegocephalus carolus</emphasis>
</taxonomicName>
sp. nov., MBM 286610, holotype, ♀ (8.9 mm): H, head; A1, antenna 1; A2, antenna 2; UL, upper lip; LL, lower lip; Md L, left mandible; Md R, right mandible; Mx1, maxilla 1; Mx2, maxilla 2; Mxp, maxilliped.
</paragraph>
</caption>
<paragraph id="E975635B8A12D2E7CE8110F3A58519E2" pageId="0" pageNumber="121">
<emphasis id="8D9608799F70028710166BC5851681FB" bold="true" pageId="0" pageNumber="121">
<emphasis id="7A8D9747095D530CD32C9B8140997553" italics="true" pageId="0" pageNumber="121">Pereopods</emphasis>
.
</emphasis>
Gnathopod 1 simple; coxa triangular, tapering, anterior margin convex; basis with anterior margin sinuous, both margins heavily setose; ischium not elongate, posterior margin bearing long setae, anterior margin with several short robust setae; carpus subequal in length to propodus, expanded distally, anterior margin bearing group of long setae distally, posterior margin setose; propodus tapering anterior margin bearing row of 6 robust setae about 2/3 length of propodus and two short robust setae subdistally, posterior surface rows of pectinate setae and rows of plumose setae; dactylus nearly straight, tapering, about 1/3 length of propodus. Gnathopod 2 simple; coxa much longer than broad, subrectangular, ventral margin slightly curved; basis much more slender than gnathopod 1, both margins setose; ischium slightly shorter than merus, subrectangular; carpus slender, not expanded distally, shorter than propodus, distal and posterior margin setose; propodus slender, setae on posterior surface similar to that of gnathopod 1; dactylus tapering, curved. Pereopod 3 coxa similar to that of gnathopod 2; basis linear, anterior margin bearing dense short robust setae, posterior margin bearing several long setae; ischium short; merus longer than carpus, anterodistally drawn out, with one long robust seta, posterior margin bearing several setae; carpus subequal in length to propodus, posterior margin with few setae; propodus with only posterior margin bearing few small setae; dactylus tapering, slightly curved. Pereopod 4 similar to pereopod 3, but coxa large, posteroventral lobe broadly rounded, posterior margin excavate. Pereopod 5 slightly longer than pereopod 4; coxa bilobate, posterior lobe deeper; basis linear, both margins setose; merus to dactylus of similar appearance to pereopod 4, but merus subequal in length to carpus, and propodus much slender, distinctly longer than carpus. Pereopod 6 longer than pereopod 5; coxa unilobate; basis expanded posteriorly, rounded below, anterior margin and anterior dorsal surface with several robust setae, posterior margin serrated with small setae; distal 5 articles of similar appearance to pereopod 5. Pereopod 7 shorter than pereopod 6, but longer than pereopod 5; basis expanded posteriorly, distinctly larger than that of pereopod 6, posterior margin serrated with small setae, beyond end of ischium; merus longer than carpus, margins setose; carpus shorter than propodus, anterior margin with three groups setae; propodus shorter than that of pereopod 6, anterior margin with small setae; dactylus slightly curved, tapering.
</paragraph>
<caption id="7CCEA62EB018EE37DD8EBC0CDEC65933" doi="10.3897/zookeys.1195.114209.figure4" httpUri="https://binary.pensoft.net/fig/1001337" pageId="0" pageNumber="121" start="Figure 4" startId="F4">
<paragraph id="E2F30E8170B1616333AB9F9338CA1249" pageId="0" pageNumber="121">
<emphasis id="DBF68911905EE7410DB1BAB45D182E11" bold="true" pageId="0" pageNumber="121">Figure 4.</emphasis>
<taxonomicName id="B9F2FDB9DAD395D29E4B44C400EEDBE1" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="67BEB0378128BACFA435753DBEACADDB" italics="true" pageId="0" pageNumber="121">Stegocephalus carolus</emphasis>
</taxonomicName>
sp. nov., MBM 286610, holotype, ♀ (8.9 mm): P3 R, right pereopod 3; P4 R, right pereopod 4; P5 R, right pereopod 5; P6 R, right pereopod 6; P7 R, right pereopod 7; U1 R, right uropod 1; U2 L, left uropod 2; U3 L, left uropod 3; T, telson.
</paragraph>
</caption>
<paragraph id="AA00E655CBA50B73A71F359E4915ABAD" pageId="0" pageNumber="121">
<emphasis id="CEE8A2C5DFBF4D88B929993EDBBABE52" bold="true" pageId="0" pageNumber="121">
<emphasis id="015D6B98AE541CDAED2D78796C2503C7" italics="true" pageId="0" pageNumber="121">Uropods and telson</emphasis>
.
</emphasis>
Uropod 1 peduncle 1.4 times longer than rami, outer margin densely setose, inner margin with only 2 robust setae; rami lanceolate, subequal in length, both rami with inner and outer margins setose. Uropod 2 shorter than uropod 1, peduncle subequal in length to rami, both margins setose; rami subequal in length, both rami with inner and outer margins setose. Uropod 3 shortest, peduncle distinctly shorter than rami, not setose; outer ramus 1-articulate, shorter than inner ramus, both rami with inner and outer margins setose. Telson longer than broad, without setae, cleft about 0.8 of total length, distally acute.
</paragraph>
</subSubSection>
<subSubSection id="3B26FC22081C9CFC541F590EF1E133A4" pageId="0" pageNumber="121" type="etymology">
<paragraph id="1DC1DC0E7506B3487DCF1EF16D3AD7B1" pageId="0" pageNumber="121">Etymology.</paragraph>
<paragraph id="3DBB383F9CEB854741A02B7D27199A6D" pageId="0" pageNumber="121">The new species is named after its type locality, the Caroline Plate.</paragraph>
</subSubSection>
<subSubSection id="D6765BCF859872607674AEF371E19778" pageId="0" pageNumber="121" type="distribution">
<paragraph id="991830A5EB52B7A59BE83B0B1921A8F5" pageId="0" pageNumber="121">Distribution.</paragraph>
<paragraph id="425FCF92B45426F1C472097BDD184B14" pageId="0" pageNumber="121">Presently known only from a seamount of the Caroline Plate, at a depth of 813-1221 m.</paragraph>
</subSubSection>
<subSubSection id="848D8FF362D89CA7C50C15A72E68D554" pageId="0" pageNumber="121" type="remarks">
<paragraph id="9BB9372F74A129C4CC6B1CF7DD637739" pageId="0" pageNumber="121">Remarks.</paragraph>
<paragraph id="941CE0A7D2323A170902D57397E19C74" pageId="0" pageNumber="121">
According to the revision of the family
<taxonomicName id="E33EF6E9CB1A58D1F2402EA9DF8C1ACD" authorityName="Dana" authorityYear="1852" class="Malacostraca" family="Stegocephalidae" kingdom="Animalia" lsidName="" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="family">Stegocephalidae</taxonomicName>
Dana, 1852 by
<bibRefCitation id="BF8C487F462A07DA4EA2840C7B223606" DOI="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" author="Berge, J" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="121" pagination="531 - 592" refId="B4" refString="Berge, J, Vader, W, 2001. Revision of the amphipod (Crustacea) family Stegocephalidae. Zoological Journal of the Linnean Society 133 (4): 531 - 592, DOI: https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" title="Revision of the amphipod (Crustacea) family Stegocephalidae." url="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" volume="133" year="2001">Berge and Vader (2001)</bibRefCitation>
,
<taxonomicName id="55EA4CFF820D89671F2F7544AD9D8C20" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="A3AB2826E45124127596B03551D98BD8" italics="true" pageId="0" pageNumber="121">Stegocephalus carolus</emphasis>
</taxonomicName>
sp. nov. belongs to the subfamily
<taxonomicName id="AABB10FAD1F72724481CD36B7F6CA269" authorityName="Dana" authorityYear="1852" lsidName="" pageId="0" pageNumber="121" rank="subFamily" subFamily="Stegocephalinae">Stegocephalinae</taxonomicName>
Dana, 1852. The new species shares distinctive characteristics with other species in the genus
<taxonomicName id="3759B3B7ADB2EFB48AB8FC5858747057" authorityName="Kroyer" authorityYear="1842" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="genus">
<emphasis id="EC5EABD6FBDBD89E5F6933B208732EC2" italics="true" pageId="0" pageNumber="121">Stegocephalus</emphasis>
</taxonomicName>
<normalizedToken id="087EEA8D7227784873E409734205C340" originalValue="Krøyer">Kroyer</normalizedToken>
, 1842, including a two-articulate palp of maxilla 1, a produced palp article 2 of the maxilliped, a conspicuously expanded basis of pereopod 6, a 1-articulate outer ramus of uropod 3, and a cleft telson. Two
<taxonomicName id="28AA224D258149AE36BDCE29CEC410F4" authorityName="Kroyer" authorityYear="1842" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="genus">
<emphasis id="41132F154E23C087DF64B4E4F646F421" italics="true" pageId="0" pageNumber="121">Stegocephalus</emphasis>
</taxonomicName>
species,
<taxonomicName id="6C3DED17908300143FE39A08DB5BFD5F" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="A2CDCD445DEEB19E1A6B01138B76A0B5" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
(Moore, 1992) and
<taxonomicName id="5DBFEF0391DFC01A0866983E969D955B" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. longicornis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="longicornis">
<emphasis id="19DF0C1F0805135ECC17D309835DB23F" italics="true" pageId="0" pageNumber="121">S. longicornis</emphasis>
</taxonomicName>
(Gurjanova, 1962), have been previously reported in the North Pacific (
<bibRefCitation id="2B47A5C07D04A02A156D655C22D2AC1B" DOI="https://doi.org/10.1080/00222939200770551" author="Moore, PG" journalOrPublisher="Journal of Natural History" pageId="0" pageNumber="121" pagination="905 - 936" refId="B8" refString="Moore, PG, 1992. A study on amphipods from the superfamily Stegocephaloidea Dana 1852 from the northeastern Pacific region: Systematics and distributional ecology. Journal of Natural History 26 (5): 905 - 936, DOI: https://doi.org/10.1080/00222939200770551" title="A study on amphipods from the superfamily Stegocephaloidea Dana 1852 from the northeastern Pacific region: Systematics and distributional ecology." url="https://doi.org/10.1080/00222939200770551" volume="26" year="1992">Moore 1992</bibRefCitation>
;
<bibRefCitation id="20567F5B03B82868598C130AFA3CE16E" DOI="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" author="Berge, J" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="121" pagination="531 - 592" refId="B4" refString="Berge, J, Vader, W, 2001. Revision of the amphipod (Crustacea) family Stegocephalidae. Zoological Journal of the Linnean Society 133 (4): 531 - 592, DOI: https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" title="Revision of the amphipod (Crustacea) family Stegocephalidae." url="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" volume="133" year="2001">Berge and Vader 2001</bibRefCitation>
).
</paragraph>
<paragraph id="12ACF9E6115EFB4E342450D2318382D6" pageId="0" pageNumber="121">
<taxonomicName id="3E39A39D9FE49898ABB332234E1ED558" baseAuthorityName="Moore" baseAuthorityYear="1992" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="49E1B558C4BD283606A1B67362EE3574" italics="true" pageId="0" pageNumber="121">Stegocephalus cascadiensis</emphasis>
</taxonomicName>
(Moore, 1992) was originally reported from the Cascadia Abyssal Plain at a depth of 2740-2818 m (
<bibRefCitation id="97ABD0609E6EB4AF67E0D50674990DC8" DOI="https://doi.org/10.1080/00222939200770551" author="Moore, PG" journalOrPublisher="Journal of Natural History" pageId="0" pageNumber="121" pagination="905 - 936" refId="B8" refString="Moore, PG, 1992. A study on amphipods from the superfamily Stegocephaloidea Dana 1852 from the northeastern Pacific region: Systematics and distributional ecology. Journal of Natural History 26 (5): 905 - 936, DOI: https://doi.org/10.1080/00222939200770551" title="A study on amphipods from the superfamily Stegocephaloidea Dana 1852 from the northeastern Pacific region: Systematics and distributional ecology." url="https://doi.org/10.1080/00222939200770551" volume="26" year="1992">Moore 1992</bibRefCitation>
).
<taxonomicName id="AB9793076B6243865D7F1945BA266879" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="E987A4F863D006D73A5CEE4A41716B2A" italics="true" pageId="0" pageNumber="121">Stegocephalus carolus</emphasis>
</taxonomicName>
sp. nov. differs from
<taxonomicName id="79E1E64724A50F8695FC7328E77DCEE0" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="D8732BAD2D8B74D67B8491815EEB5725" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
by the peduncle of antenna 1 longer than the first flagellar article, and the accessory flagellum extending beyond the distal margin of the first flagellar article. Additionally, the apical setae on the outer plate of maxilla 2 are hooked in the new species, whereas, they are unhooked in
<taxonomicName id="05B602EF3BA0BFF7A2F38FEB56DDA243" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="2493BA0731D95B60156E3F35C9A52E83" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
. In
<taxonomicName id="ED953FD7F53F6388AAD3D6AEEDDD0EC5" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="A4A1418D50EBCA41BCF8907C4DBDFA63" italics="true" pageId="0" pageNumber="121">S. carolus</emphasis>
</taxonomicName>
sp. nov., the first palp article of the maxilliped is subequal in length to the second article, whereas in
<taxonomicName id="6F3CAA82F2E63D3BFDC8E40EA06CC469" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="B05C62D8EECBC9681D18BF0B155E4910" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
, the first palp article is much longer than the second. The inner plate of the maxilliped is subrectangular with a concave distal margin in
<taxonomicName id="A1C520350B1EC0C9977BE25FEA1A1797" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="D95FFE6648C2F30903583125AACC083E" italics="true" pageId="0" pageNumber="121">S. carolus</emphasis>
</taxonomicName>
sp. nov., whereas it is subtriangular in
<taxonomicName id="C4C05805BF3B680105C3E2DAB4658A9C" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="18FC9667C7C3C6BE514CE68EC76CA84E" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
. The second palp article of the maxilliped in
<taxonomicName id="244C5DEBCE09E12B3464B7CE2A01402B" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="F3140194CFD735AA330E467E6FD00891" italics="true" pageId="0" pageNumber="121">S. carolus</emphasis>
</taxonomicName>
sp. nov. has a produced inner margin, and the posterior margin of pereopod 7 is slightly serrate instead of smooth. Furthermore, the rami of uropod 2 are subequal in
<taxonomicName id="122FFED66377166B9DCACFD7F722D6E2" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="0DF4EEFF8C85E79A1AB9CE93DCBFAC86" italics="true" pageId="0" pageNumber="121">S. carolus</emphasis>
</taxonomicName>
sp. nov., whereas the inner ramus is longer than the outer ramus in
<taxonomicName id="73F4A5BC653C8E2260C1920976C62DCB" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="BF2EBAE33A3DB92900DF22C0B13FBA23" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
. Lastly, the outer ramus of uropod 3 in
<taxonomicName id="660229AC5C87A44FBB2EBB2A4D0291DB" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="0D72147B6CC2F2DF6A0AFE43FDA34110" italics="true" pageId="0" pageNumber="121">S. carolus</emphasis>
</taxonomicName>
sp. nov. is shorter than the inner ramus, while in
<taxonomicName id="73B90CE17CA51CF369CC3BDCEE47D478" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. cascadiensis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="cascadiensis">
<emphasis id="A767F4CFD294B957B12E85968F8F4AEC" italics="true" pageId="0" pageNumber="121">S. cascadiensis</emphasis>
</taxonomicName>
, it is longer than the inner ramus (
<bibRefCitation id="4F8A6688F558365B172A795E0F073490" DOI="https://doi.org/10.1080/00222939200770551" author="Moore, PG" journalOrPublisher="Journal of Natural History" pageId="0" pageNumber="121" pagination="905 - 936" refId="B8" refString="Moore, PG, 1992. A study on amphipods from the superfamily Stegocephaloidea Dana 1852 from the northeastern Pacific region: Systematics and distributional ecology. Journal of Natural History 26 (5): 905 - 936, DOI: https://doi.org/10.1080/00222939200770551" title="A study on amphipods from the superfamily Stegocephaloidea Dana 1852 from the northeastern Pacific region: Systematics and distributional ecology." url="https://doi.org/10.1080/00222939200770551" volume="26" year="1992">Moore 1992</bibRefCitation>
, fig. 7).
</paragraph>
<paragraph id="E488ACD446AD8F726CE217D593AFCAFA" pageId="0" pageNumber="121">
<taxonomicName id="EA9F634093C5D2B107ECEA22B7132210" baseAuthorityName="Gurjanova" baseAuthorityYear="1962" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus longicornis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="longicornis">
<emphasis id="3D9D4BF452C287F9182AC5B26D828012" italics="true" pageId="0" pageNumber="121">Stegocephalus longicornis</emphasis>
</taxonomicName>
(Gurjanova, 1962) was originally reported from the Bering Sea at a depth of over 2440 m. The new species differs from
<taxonomicName id="FDDFA23A8B82274EE972B10AF610E172" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. longicornis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="longicornis">
<emphasis id="990AF338DCB343F42E3242D9F546512A" italics="true" pageId="0" pageNumber="121">S. longicornis</emphasis>
</taxonomicName>
by: the shorter antenna 1, the 7-articulated primary flagellum and the 1-articulated accessory flagellum, while the primary flagellum is 11-articulate and the accessory flagellum is 3-articulate in
<taxonomicName id="BC93F6694E69CD5B1996A9295487230E" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. longicornis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="longicornis">
<emphasis id="5E95F06181A4CE7E19BFB57579D9E238" italics="true" pageId="0" pageNumber="121">S. longicornis</emphasis>
</taxonomicName>
; the distal margin of the inner plate of the maxilliped is concave rather than convex, and the inner margin of palp article 2 is produced, versus not produced in
<taxonomicName id="BDC1319A385CA5AC837D880E2C545D16" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. longicornis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="longicornis">
<emphasis id="6F9F6DD3B136D16F756A256D0AE38B33" italics="true" pageId="0" pageNumber="121">S. longicornis</emphasis>
</taxonomicName>
; and the posteroventral corner of epimeral plate 3 is strongly produced and triangular, while epimeral plate 3 is only produced in a small triangular angle in
<taxonomicName id="FB59678AB2636D0E74FD9717D42E62D9" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. longicornis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="longicornis">
<emphasis id="D6904D227AED8E4BD53C0474C5FD9855" italics="true" pageId="0" pageNumber="121">S. longicornis</emphasis>
</taxonomicName>
(
<bibRefCitation id="E6335C68EE1BF0E641A026810B2FA4DA" author="Gurjanova, E" journalOrPublisher="Akademiia Nauk SSSR" pageId="0" pageNumber="121" pagination="1 - 440" refId="B5" refString="Gurjanova, E, 1962. Bokoplavy severnoi chasti Tikhogo okeana (Amphipoda, Gammaridea). Chast 1. [Amphipods of the northern part of Pacific Ocean (Amphipoda, Gammaridea). Part 1.] Opredeliteli po faune SSSR. Akademiia Nauk SSSR 74: 1 - 440" title="Bokoplavy severnoi chasti Tikhogo okeana (Amphipoda, Gammaridea). Chast 1. [Amphipods of the northern part of Pacific Ocean (Amphipoda, Gammaridea). Part 1.] Opredeliteli po faune SSSR." volume="74" year="1962">Gurjanova 1962</bibRefCitation>
, fig. 130).
</paragraph>
<paragraph id="C2C8BB75E5D5C130BEDA882B1B6695C2" pageId="0" pageNumber="121">
The remaining species of
<taxonomicName id="A6CB827EEA3A3892AA4D72164279F191" authorityName="Kroyer" authorityYear="1842" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="genus">
<emphasis id="072DE1403D872D0F1D534C894F0DEA2D" italics="true" pageId="0" pageNumber="121">Stegocephalus</emphasis>
</taxonomicName>
are found in the Arctic, North Atlantic, or the Southern Ocean (
<bibRefCitation id="FA985EAB4C843E7E7A008B6472BABF5A" DOI="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" author="Berge, J" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="121" pagination="531 - 592" refId="B4" refString="Berge, J, Vader, W, 2001. Revision of the amphipod (Crustacea) family Stegocephalidae. Zoological Journal of the Linnean Society 133 (4): 531 - 592, DOI: https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" title="Revision of the amphipod (Crustacea) family Stegocephalidae." url="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" volume="133" year="2001">Berge and Vader 2001</bibRefCitation>
).
<taxonomicName id="7869D1C7958B1FEED5E55BAAE5AD8AB0" authorityName="Wang &amp; Sha &amp; Ren" authorityYear="2024" class="Malacostraca" family="Stegocephalidae" genus="Stegocephalus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stegocephalus carolus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="carolus">
<emphasis id="77EB5863EEBC8AC21B8D61121CB55EC9" italics="true" pageId="0" pageNumber="121">Stegocephalus carolus</emphasis>
</taxonomicName>
sp. nov. can be easily distinguished from
<taxonomicName id="9133D0A9FD738627416C561F02362F4F" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. abyssicola" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="abyssicola">
<emphasis id="347B454DCF356A73C753C90FABE83EE2" italics="true" pageId="0" pageNumber="121">S. abyssicola</emphasis>
</taxonomicName>
(Oldevig, 1959) by its strongly projected posteroventral corner of the third epimeral plate (
<bibRefCitation id="9011A63A80971CAEA81B3C480DB911EA" author="Oldevig, H" journalOrPublisher=")" pageId="0" pageNumber="121" pagination="1 - 132" refId="B9" refString="Oldevig, H, 1959. Arctic, Subarctic and Scandinavian Amphipods in the collections of the Swedish Natural History Museum in Stockholm. Goteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar, sjatte foljden (ser B.) 8 (2): 1 - 132" title="Arctic, Subarctic and Scandinavian Amphipods in the collections of the Swedish Natural History Museum in Stockholm. Goteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar, sjatte foljden (ser B." volume="8" year="1959">Oldevig 1959</bibRefCitation>
). It is also different from
<taxonomicName id="587D270C842271398E3177BDDDF38D91" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. ampulla" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="ampulla">
<emphasis id="6BC6D9F1D4FDAE577ADF71946D1C6F1A" italics="true" pageId="0" pageNumber="121">S. ampulla</emphasis>
</taxonomicName>
(Phipps, 1774),
<taxonomicName id="1B60820F6584D0C7B843F0304FFBBC32" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. inflatus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="inflatus">
<emphasis id="C4D1CB5D3CA27FD0B60CC02EB5F367C4" italics="true" pageId="0" pageNumber="121">S. inflatus</emphasis>
</taxonomicName>
<normalizedToken id="B906CEC34C11C92F4AE52EDC17AEE457" originalValue="Krøyer">Kroyer</normalizedToken>
, 1842,
<taxonomicName id="596150624957F6CF0A97499BE4235168" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. rostrata" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="rostrata">
<emphasis id="CF3490AC24F1447CE84B404ACA27C789" italics="true" pageId="0" pageNumber="121">S. rostrata</emphasis>
</taxonomicName>
KH Barnard, 1932, and
<taxonomicName id="31CE40B2BF2434FCD3C1082CCEC1F2C2" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. similis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="similis">
<emphasis id="7D189FB74E3A4041493EC7AD054438AC" italics="true" pageId="0" pageNumber="121">S. similis</emphasis>
</taxonomicName>
Sars, 1891 by the absence of a rostrum (
<bibRefCitation id="5E09E57C653BA162B8866FBB2E3FB5FC" DOI="https://doi.org/10.5962/bhl.part.27664" author="Barnard, KH" journalOrPublisher="Discovery Reports" pageId="0" pageNumber="121" pagination="1 - 326" refId="B1" refString="Barnard, KH, 1932. Amphipoda. Discovery Reports 5: 1 - 326, DOI: https://doi.org/10.5962/bhl.part.27664" title="Amphipoda." url="https://doi.org/10.5962/bhl.part.27664" volume="5" year="1932">Barnard 1932</bibRefCitation>
;
<bibRefCitation id="7B25FCC0E9922055628E79E2FEF0AEE6" DOI="https://doi.org/10.1139/z67-123" author="Steele, DH" journalOrPublisher="Canadian Journal of Zoology" pageId="0" pageNumber="121" pagination="1129 - 1133" refId="B11" refString="Steele, DH, 1967. The morphology of the marine amphipod Stegocephalus inflatus Kroyer. Canadian Journal of Zoology 45 (6): 1129 - 1133, DOI: https://doi.org/10.1139/z67-123" title="The morphology of the marine amphipod Stegocephalus inflatus Kroyer." url="https://doi.org/10.1139/z67-123" volume="45" year="1967">Steele 1967</bibRefCitation>
;
<bibRefCitation id="6FE081ED8AE8A3CBD41DB3370818D308" DOI="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" author="Berge, J" journalOrPublisher="Zoological Journal of the Linnean Society" pageId="0" pageNumber="121" pagination="531 - 592" refId="B4" refString="Berge, J, Vader, W, 2001. Revision of the amphipod (Crustacea) family Stegocephalidae. Zoological Journal of the Linnean Society 133 (4): 531 - 592, DOI: https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" title="Revision of the amphipod (Crustacea) family Stegocephalidae." url="https://doi.org/10.1111/j.1096-3642.2001.tb00638.x" volume="133" year="2001">Berge and Vader 2001</bibRefCitation>
). Especially, it differs from
<taxonomicName id="920FA432BCC349E1887D02A3E1C34856" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. inflatus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="inflatus">
<emphasis id="DCDBF17FCA39739A83EC3A38D0CBC838" italics="true" pageId="0" pageNumber="121">S. inflatus</emphasis>
</taxonomicName>
by the pale of maxillae 1 being 2-articulated, while it is 1-articulated in
<taxonomicName id="51CBC25D2463F1E12DF2E995E979AD25" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. inflatus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="inflatus">
<emphasis id="B06A617C52DEBF78EA5E8FAA9DFF1820" italics="true" pageId="0" pageNumber="121">S. inflatus</emphasis>
</taxonomicName>
(
<bibRefCitation id="7C96BC61854741EBA9865B603EB911F2" DOI="https://doi.org/10.1139/z67-123" author="Steele, DH" journalOrPublisher="Canadian Journal of Zoology" pageId="0" pageNumber="121" pagination="1129 - 1133" refId="B11" refString="Steele, DH, 1967. The morphology of the marine amphipod Stegocephalus inflatus Kroyer. Canadian Journal of Zoology 45 (6): 1129 - 1133, DOI: https://doi.org/10.1139/z67-123" title="The morphology of the marine amphipod Stegocephalus inflatus Kroyer." url="https://doi.org/10.1139/z67-123" volume="45" year="1967">Steele 1967</bibRefCitation>
, fig. 1B); epimeral plates 2 and 3 have the posteroventral corner broadly rounded, while epimeral plates 2 and 3 are produced into a sharp tooth in
<taxonomicName id="3FDFB2CC301CE17BB26F866ABCBE9489" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. inflatus" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="inflatus">
<emphasis id="8B8C0ADD5C15230954E41BF3005265E8" italics="true" pageId="0" pageNumber="121">S. inflatus</emphasis>
</taxonomicName>
(
<bibRefCitation id="1570DE03A4E68CE3DA398F8283D2B0AE" DOI="https://doi.org/10.1139/z67-123" author="Steele, DH" journalOrPublisher="Canadian Journal of Zoology" pageId="0" pageNumber="121" pagination="1129 - 1133" refId="B11" refString="Steele, DH, 1967. The morphology of the marine amphipod Stegocephalus inflatus Kroyer. Canadian Journal of Zoology 45 (6): 1129 - 1133, DOI: https://doi.org/10.1139/z67-123" title="The morphology of the marine amphipod Stegocephalus inflatus Kroyer." url="https://doi.org/10.1139/z67-123" volume="45" year="1967">Steele 1967</bibRefCitation>
, fig. 1A). Additionally, the new species can be distinguished from
<taxonomicName id="EA3AF2ACF6CEAFB4A95D665E9467450F" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. kergueleni" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="kergueleni">
<emphasis id="D6FD772132E8F346D032DC873074BC51" italics="true" pageId="0" pageNumber="121">S. kergueleni</emphasis>
</taxonomicName>
(Schellenberg, 1926) and
<taxonomicName id="C357C64DD002E39CD1C91FB3D5976E6A" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. nipoma" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="nipoma">
<emphasis id="8AB3965CB9558805E6F6548F7BA626C9" italics="true" pageId="0" pageNumber="121">S. nipoma</emphasis>
</taxonomicName>
(J.L. Barnard, 1961) by the presence of a toothed left lacinia mobilis, the posterior margin of gnathopod 1 is not densely setose; and the subacute posteroventral of epimeral 2 is not broadly rounded (
<bibRefCitation id="6F0BDC6E96F0303CBD5338BC9D5EAAF6" author="Schellenberg, A" journalOrPublisher=")" pageId="0" pageNumber="121" refId="B10" refString="Schellenberg, A, 1926. Amphipoda 3: Die Gammariden der Deutschen Tiefsee-Expedition. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer &quot;Valdivia&quot; 1898-1899 23(5): 195-243. [28 figs, 1 pl.]" title="Amphipoda 3: Die Gammariden der Deutschen Tiefsee-Expedition. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer &quot; Valdivia &quot; 1898 - 1899 23 (5): 195 - 243. [28 figs, 1 pl.]" year="1926">Schellenberg 1926</bibRefCitation>
;
<bibRefCitation id="2EBE3C510E329936EB82E568ABFCC2C2" author="Barnard, JL" journalOrPublisher="Galathea Report" pageId="0" pageNumber="121" pagination="23 - 128" refId="B2" refString="Barnard, JL, 1961. Gammaridean Amphipoda from depths of 400-6000 meters. Galathea Report 5: 23 - 128" title="Gammaridean Amphipoda from depths of 400 - 6000 meters." volume="5" year="1961">Barnard 1961</bibRefCitation>
). Lastly, it also differs from
<taxonomicName id="EE0AFE800AA2DA8EA76042FB3F0D550B" class="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="S. similis" order="Amphipoda" pageId="0" pageNumber="121" phylum="Arthropoda" rank="species" species="similis">
<emphasis id="9ECA711B797DB5CC88DF56339BC0F541" italics="true" pageId="0" pageNumber="121">S. similis</emphasis>
</taxonomicName>
by the shape of the third epimeral plate, which is neither serrated nor notched (
<bibRefCitation id="D01728AA778FE82311065D96B585FBD0" author="Oldevig, H" journalOrPublisher=")" pageId="0" pageNumber="121" pagination="1 - 132" refId="B9" refString="Oldevig, H, 1959. Arctic, Subarctic and Scandinavian Amphipods in the collections of the Swedish Natural History Museum in Stockholm. Goteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar, sjatte foljden (ser B.) 8 (2): 1 - 132" title="Arctic, Subarctic and Scandinavian Amphipods in the collections of the Swedish Natural History Museum in Stockholm. Goteborgs Kungliga Vetenskaps- och Vitterhets-Samhalles Handlingar, sjatte foljden (ser B." volume="8" year="1959">Oldevig 1959</bibRefCitation>
).
</paragraph>
</subSubSection>
</treatment>
</subSection>
</document>
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