<document id="6562EDAFBA11AAF11F48D4EB432CD545" ID-DOI="10.1590/2358-2936e2023005" ID-ISSN="2358-2936" ID-Zenodo-Dep="10716750" ID-ZooBank="D4641240-C79E-471D-8F7C-8A2DA4AA04A8" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="jonas" IM.materialsCitations_approvedBy="jonas" IM.metadata_approvedBy="felipe" IM.tables_approvedBy="jonas" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="jonas" checkinTime="1709038404877" checkinUser="felipe" docAuthor="Matsumoto, Yu, Kajihara, Hiroshi &amp; Kakui, Keiichi" docDate="2023" docId="03FFE42FE727FFFFFF5AFA59FA10F861" docLanguage="en" docName="Nauplius.31.e2023005.pdf" docOrigin="Nauplius (e 2023005) 31" docSource="http://dx.doi.org/10.1590/2358-2936e2023005" docStyle="DocumentStyle:64D98C772C5FBF4D3A503C51F9604E62.1:Nauplius.2017-.journal_article" docStyleId="64D98C772C5FBF4D3A503C51F9604E62" docStyleName="Nauplius.2017-.journal_article" docStyleVersion="1" docTitle="Leipsuropus Stebbing 1899" docType="key" docVersion="1" lastPageNumber="6" masterDocId="FFC69C57E722FFFAFFEFFF98FFABFFE8" masterDocTitle="A new species of Leipsuropus Stebbing, 1899 (Amphipoda: Podoceridae) from Japan" masterLastPageNumber="8" masterPageNumber="1" pageNumber="6" updateTime="1712175455357" updateUser="jonas" zenodo-license-document="CC-BY-NC-4.0">
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<mods:title id="7AB6C4BE6FA4632161A2C5D5CF2BFF28">A new species of Leipsuropus Stebbing, 1899 (Amphipoda: Podoceridae) from Japan</mods:title>
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<mods:namePart id="DB4433CF70E299454832B5B64F498C91">Matsumoto, Yu</mods:namePart>
<mods:affiliation id="886FBEDE018864BF5FF01A0F72C4D886">Graduate School of Science, Hokkaido University. Sapporo 060 - 0810, Japan</mods:affiliation>
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<mods:namePart id="ED397ADAA1E392BFC5C76919DB1F818F">Kajihara, Hiroshi</mods:namePart>
<mods:affiliation id="D7A2D968C0E2E65E5ACF504508B72B98">Faculty of Science, Hokkaido University. Sapporo 060 - 0810, Japan E-mail: kakui @ eis. hokudai. ac. jp &amp; DA</mods:affiliation>
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<mods:namePart id="C0481EA2DBED4F415EB8DC6541D12B41">Kakui, Keiichi</mods:namePart>
<mods:affiliation id="52DD39BCDADAB0A05AD17EEE7CEE81CB">Faculty of Science, Hokkaido University. Sapporo 060 - 0810, Japan E-mail: kakui @ eis. hokudai. ac. jp &amp; DA</mods:affiliation>
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<emphasis id="B922892BE727FFFFFF5AFA59FE5FFA34" box="[181,500,1472,1501]" italics="true" pageId="5" pageNumber="6">Key to males of the species of</emphasis>
<taxonomicName id="4C562EBAE727FFFFFDEFFA58FD3EFA35" ID-CoL="7PMK3" authorityName="Stebbing" authorityYear="1899" box="[512,661,1472,1501]" class="Malacostraca" family="Podoceridae" genus="Leipsuropus" kingdom="Animalia" order="Amphipoda" pageId="5" pageNumber="6" phylum="Arthropoda" rank="genus">Leipsuropus</taxonomicName>
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1. Dorsal projections on body absent ........................................................................ 
<taxonomicName id="4C562EBAE727FFFFFBB9F997FA10F9C3" authority="(Haswell, 1879)" baseAuthorityName="Haswell" baseAuthorityYear="1879" box="[1110,1467,1550,1579]" class="Malacostraca" family="Podoceridae" genus="Leipsuropus" kingdom="Animalia" order="Amphipoda" pageId="5" pageNumber="6" phylum="Arthropoda" rank="species" species="parasiticus">
<emphasis id="B922892BE727FFFFFBB9F997FB59F9C3" box="[1110,1266,1551,1579]" italics="true" pageId="5" pageNumber="6">L. parasiticus</emphasis>
(
<bibRefCitation id="EFC728C8E727FFFFFAEFF996FA19F9C3" author="Haswell WA" box="[1280,1458,1550,1579]" pageId="5" pageNumber="6" pagination="245 - 279" refId="ref3338" refString="Haswell WA 1879. On Australian Amphipoda. Proceedings of the Linnean Society of New South Wales, 4: 245 - 279, pls. 7 - 12. DOI: https: // www. doi. org / 10.5962 / bhl. part. 22848" type="journal article" year="1879">Haswell, 1879</bibRefCitation>
)
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<keyLead id="30A7F60CE727FFFFFF5AF9ADFA11F9BA" box="[181,1466,1589,1618]" pageId="5" pageNumber="6">1'. Dorsal projections on body present .......................................................................................................................... 2</keyLead>
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2. Tergal plate of pereonites 2–5 with 1 projection ................................................................ 
<taxonomicName id="4C562EBAE727FFFFFB2BF9C5FA11F991" authority="Ren, 2012" authorityName="Ren" authorityYear="2012" box="[1220,1466,1628,1657]" class="Malacostraca" family="Podoceridae" genus="Leipsuropus" kingdom="Animalia" order="Amphipoda" pageId="5" pageNumber="6" phylum="Arthropoda" rank="species" species="sinensis">
<emphasis id="B922892BE727FFFFFB2BF9C5FA91F991" box="[1220,1338,1629,1657]" italics="true" pageId="5" pageNumber="6">L. sinensis</emphasis>
<bibRefCitation id="EFC728C8E727FFFFFAAFF9C4FA11F991" author="Ren X" box="[1344,1466,1628,1657]" pageId="5" pageNumber="6" refId="ref3850" refString="Ren X 2012. Fauna Sinica, Invertebrata Vol. 43. Crustacea: Amphipoda: Gammaridea (II). Beijing, Science Press. 651 p. (in Chinese with English abstract and descriptions of new species)" type="book" year="2012">Ren, 2012</bibRefCitation>
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<keyLead id="30A7F60CE727FFFFFF5AF91BFA11F948" box="[181,1466,1666,1696]" pageId="5" pageNumber="6">2'. Tergal plate of pereonites 2–5 with 3 or 5 projections ......................................................................................... 3</keyLead>
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3. Tergal plate of pereonites 2–5 with 3 projections ................................................. 
<taxonomicName id="4C562EBAE727FFFFFB87F933FA11F92F" authority="Ariyama, 2012" authorityName="Ariyama" authorityYear="2012" box="[1128,1466,1706,1735]" class="Malacostraca" family="Podoceridae" genus="Leipsuropus" kingdom="Animalia" order="Amphipoda" pageId="5" pageNumber="6" phylum="Arthropoda" rank="species" species="astericolus">
<emphasis id="B922892BE727FFFFFB87F933FAAAF92F" box="[1128,1281,1706,1735]" italics="true" pageId="5" pageNumber="6">L. astericolus</emphasis>
<bibRefCitation id="EFC728C8E727FFFFFAE8F932FA11F92F" author="Ariyama H" box="[1287,1466,1706,1735]" pageId="5" pageNumber="6" pagination="41 - 55" refId="ref3193" refString="Ariyama H 2012. Two new species of the genus Leipsuropus (Crustacea: Amphipoda: Podoceridae) from Japanese and Korean waters. Zootaxa, 3485: 41 - 55. DOI: https: // www. doi. org / 10.11646 / zootaxa. 3485.1.3" type="journal article" year="2012">Ariyama, 2012</bibRefCitation>
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<keyLead id="30A7F60CE727FFFFFF5AF949FA11F906" box="[181,1466,1744,1774]" pageId="5" pageNumber="6">3'. Tergal plate of pereonites 2–5 with 5 projections ................................................................................................. 4</keyLead>
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4. Dorsal projections on body broad and keel-like; gnathopod-2 palmar margin with one wide and two large triangular projections ............................................................................................................... 
<taxonomicName id="4C562EBAE727FFFFFB4DF887FA11F8D4" authority="Ariyama, 2012" authorityName="Ariyama" authorityYear="2012" box="[1186,1466,1822,1852]" class="Malacostraca" family="Podoceridae" genus="Leipsuropus" kingdom="Animalia" order="Amphipoda" pageId="5" pageNumber="6" phylum="Arthropoda" rank="species" species="hongi">
<emphasis id="B922892BE727FFFFFB4DF887FAAAF8D3" box="[1186,1281,1822,1851]" italics="true" pageId="5" pageNumber="6">L. hongi</emphasis>
<bibRefCitation id="EFC728C8E727FFFFFAE8F886FA11F8D4" author="Ariyama H" box="[1287,1466,1822,1852]" pageId="5" pageNumber="6" pagination="41 - 55" refId="ref3193" refString="Ariyama H 2012. Two new species of the genus Leipsuropus (Crustacea: Amphipoda: Podoceridae) from Japanese and Korean waters. Zootaxa, 3485: 41 - 55. DOI: https: // www. doi. org / 10.11646 / zootaxa. 3485.1.3" type="journal article" year="2012">Ariyama, 2012</bibRefCitation>
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<keyLead id="30A7F60CE727FFFFFF5AF8DEFA10F861" pageId="5" pageNumber="6">
4'. Dorsal projections on body narrow and spiniform; gnathopod-2 palmar margin with small, proximal, denticulate projection ......................................................................................................................... 
<taxonomicName id="4C562EBAE727FFFFFB0AF8F5FAF0F861" authority="Matsumoto &amp; Kajihara &amp; Kakui, 2023" authorityName="Matsumoto &amp; Kajihara &amp; Kakui" authorityYear="2023" box="[1253,1371,1901,1929]" class="Malacostraca" family="Podoceridae" genus="Leipsuropus" kingdom="Animalia" order="Amphipoda" pageId="5" pageNumber="6" phylum="Arthropoda" rank="species" species="seisuiae" status="sp. nov.">
<emphasis id="B922892BE727FFFFFB0AF8F5FAF0F861" box="[1253,1371,1901,1929]" italics="true" pageId="5" pageNumber="6">L. seisuiae</emphasis>
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<taxonomicNameLabel id="A2113450E727FFFFFA8EF8F5FA10F861" box="[1377,1467,1901,1929]" pageId="5" pageNumber="6" rank="species">sp. nov.</taxonomicNameLabel>
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