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<mods:title id="AC4B7D17B2B3D347E01A1316EDDCED5A">A new Southern Ocean species in the remarkable and rare amphipod family Podosiridae (Crustacea: Amphipoda) questions existing systematic hypotheses</mods:title>
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<mods:namePart id="F29AB4FD13273917E18E55CF398FDD1D">Ashford, Oliver S.</mods:namePart>
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<mods:namePart id="B850A7AFD8F5BC071C4FFF4439651517">Roterman, Christopher N.</mods:namePart>
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<mods:namePart id="21F38CF26076C8C3D66A25F26D96D386">Thurston, Michael H.</mods:namePart>
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<mods:namePart id="C8C483D3E453F9381EA36B6017F4162B">Griffiths, Huw J.</mods:namePart>
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<mods:namePart id="33967360F76CC2E4B3E5D2B7BCF11D79">Brandt, Angelika</mods:namePart>
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<paragraph id="8BC236B7FFFAFF9C1B2A75C615E1FAB8" blockId="7.[841,1428,1275,1300]" box="[841,1428,1275,1300]" pageId="7" pageNumber="620">
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GENUS
<taxonomicName id="4C7D4D34FFFAFF9C1BC375C11578FAB8" ID-CoL="7ZJPQ" authority="RAUSCHERT, 2017" authorityName="RAUSCHERT" authorityYear="2017" box="[928,1293,1275,1300]" class="Malacostraca" family="Podosiridae" genus="Acutocoxae" kingdom="Animalia" order="Amphipoda" pageId="7" pageNumber="620" phylum="Arthropoda" rank="genus">
<emphasis id="B909EAA5FFFAFF9C1BC375C1144DFABF" box="[928,1080,1276,1299]" italics="true" pageId="7" pageNumber="620">ACUTOCOXAE</emphasis>
<bibRefCitation id="EFEC4B46FFFAFF9C1C2375C61578FAB8" author="Rauschert M" box="[1088,1293,1275,1300]" pageId="7" pageNumber="620" refId="ref9437" refString="Rauschert M. 2017. Neue Gammariden aus dem Weddellmeer. Berlin: published by the author. Available at: http: // tree. bio. ed. ac. uk / software / tracer / (accessed 8 May 2017)." type="url" year="2017">RAUSCHERT, 2017</bibRefCitation>
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(AMENDED)
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</paragraph>
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<paragraph id="8BC236B7FFFAFF9C1B58747A130CFAD6" blockId="7.[827,1441,1350,1402]" pageId="7" pageNumber="620">
<emphasis id="B909EAA5FFFAFF9C1B58747A13ACFAF0" box="[827,985,1351,1372]" italics="true" pageId="7" pageNumber="620">
<typeStatus id="54C68815FFFAFF9C1B58747A1306FAF0" box="[827,883,1351,1372]" pageId="7" pageNumber="620">Type</typeStatus>
species:
</emphasis>
<taxonomicName id="4C7D4D34FFFAFF9C1B84747A1300FAD6" authority="Rauschert, 2017" authorityName="Rauschert" authorityYear="2017" class="Malacostraca" family="Podosiridae" genus="Acutocoxae" kingdom="Animalia" order="Amphipoda" pageId="7" pageNumber="620" phylum="Arthropoda" rank="species" species="weddellensis">
<emphasis id="B909EAA5FFFAFF9C1B84747A1566FAF7" box="[999,1299,1350,1372]" italics="true" pageId="7" pageNumber="620">Acutocoxae weddellensis</emphasis>
<bibRefCitation id="EFEC4B46FFFAFF9C1D7D747B1300FAD6" author="Rauschert M" pageId="7" pageNumber="620" refId="ref9437" refString="Rauschert M. 2017. Neue Gammariden aus dem Weddellmeer. Berlin: published by the author. Available at: http: // tree. bio. ed. ac. uk / software / tracer / (accessed 8 May 2017)." type="url" year="2017">Rauschert, 2017</bibRefCitation>
</taxonomicName>
.
</paragraph>
<paragraph id="8BC236B7FFFAFF9C1B58749113C1FA6F" blockId="7.[827,948,1452,1475]" box="[827,948,1452,1475]" pageId="7" pageNumber="620">
<emphasis id="B909EAA5FFFAFF9C1B58749113C1FA6F" box="[827,948,1452,1475]" italics="true" pageId="7" pageNumber="620">Diagnosis</emphasis>
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<paragraph id="8BC236B7FFFAFF931B5874E911B4FE94" blockId="7.[827,1443,1492,1882]" lastBlockId="8.[145,761,198,650]" lastPageId="8" lastPageNumber="621" pageId="7" pageNumber="620">
Bodyslender,dorsoventrallyflattened, carinatedorsally and laterally. Rostrum moderate; lateral cephalic lobe strongly produced, acute. Eyes present. Antenna 1 much longer than body, peduncle article 1 much longer than the head, article 2 longer than article 1, article 3 short, accessory flagellum absent. Antenna 2 slender. Labrum weakly bilobed. Mandibular molar a toothed flap, incisor process multidentate,
<emphasis id="B909EAA5FFFAFF9C1CB37797150AF913" box="[1232,1407,1706,1727]" italics="true" pageId="7" pageNumber="620">lacinia mobilis</emphasis>
on left mandible only (in
<taxonomicName id="4C7D4D34FFFAFF9C1C5777F414C0F972" authorityName="Horton, Ashford &amp; Thurston in Ashford, Horton, Roterman, Thurston, Griffiths &amp; Brandt" authorityYear="2019" box="[1076,1205,1737,1758]" class="Malacostraca" family="Podosiridae" genus="Acutocoxae" kingdom="Animalia" order="Amphipoda" pageId="7" pageNumber="620" phylum="Arthropoda" rank="species" species="ogilvieae">
<emphasis id="B909EAA5FFFAFF9C1C5777F414C0F972" box="[1076,1205,1737,1758]" italics="true" pageId="7" pageNumber="620">A. ogilvieae</emphasis>
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), as broad as incisor; palp uniarticulate. Maxilla 1 inner plate small with a single robust terminal seta, outer plate with large terminal robust setae. Maxilla 2 inner plate short, shorter than outer. Maxilliped basal article elongate, reflexed posteriorly; inner plates very small, fused or not; outer plates absent; palp very elongate, strongly raptorial, 4-articulate, dactylus recurved, longer than article 3, minutely serrate.
</paragraph>
<paragraph id="8BC236B7FFF5FF9318CA707C12A5FD25" blockId="8.[145,761,198,650]" pageId="8" pageNumber="621">Coxae 12 short, with single acute antero- or ventrolaterally directed processes. Coxae 34 short, with two acute antero- and posterolaterally directed processes. Coxae 57 short, with single acute posterolaterally directed processes. Gnathopod 2 larger than gnathopod 1, subchelate. Pereopods 37 strongly prehensile, basis linear, not lobate. Epimeral plate 3 subquadrate. Urosomite 1 longer than 2 and 3 combined, without dorsal teeth. Uropods 13 peduncles much longer than rami. Uropod 3 uniramous. Telson entire, suboval, without setae.</paragraph>
<paragraph id="8BC236B7FFF5FF9318F273EF108BFD46" blockId="8.[145,254,722,746]" box="[145,254,722,746]" pageId="8" pageNumber="621">
<emphasis id="B909EAA5FFF5FF9318F273EF108BFD46" box="[145,254,722,746]" italics="true" pageId="8" pageNumber="621">Remarks</emphasis>
</paragraph>
<paragraph id="8BC236B7FFF5FF9318F273C7121FFBA9" blockId="8.[145,761,762,1459]" pageId="8" pageNumber="621">
Specimens of the new species exhibit the slender, dorsoventrally flattened body, moderate rostrum, lack of accessory flagellum, extended, raptorial maxilliped, acuminate coxae, elongate urosomite 1 and entire telson that are seen in the genus
<taxonomicName id="4C7D4D34FFF5FF931A6C724812F4FC26" authorityName="Bellan-Santini" authorityYear="2007" box="[527,641,885,906]" class="Malacostraca" family="Podosiridae" genus="Podosirus" kingdom="Animalia" order="Amphipoda" pageId="8" pageNumber="621" phylum="Arthropoda" rank="genus">
<emphasis id="B909EAA5FFF5FF931A6C724812F4FC26" box="[527,641,885,906]" italics="true" pageId="8" pageNumber="621">Podosirus</emphasis>
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. However, the genus
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<emphasis id="B909EAA5FFF5FF93196C72A911E6FC05" box="[271,403,916,937]" italics="true" pageId="8" pageNumber="621">Acutocoxae</emphasis>
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differs from
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<emphasis id="B909EAA5FFF5FF931A5772A912DCFC05" box="[564,681,916,937]" italics="true" pageId="8" pageNumber="621">Podosirus</emphasis>
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in the strongly produced lateral cephalic lobes, presence of eyes, ratio of antenna 1 articles, elongate peduncles of uropods 13 and uniramous uropod 3.
</paragraph>
<paragraph id="8BC236B7FFF5FF9318CA7532129FFA1E" blockId="8.[145,761,762,1459]" pageId="8" pageNumber="621">
A revised diagnosis of the genus
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<emphasis id="B909EAA5FFF5FF931A087532128DFB88" box="[619,760,1039,1060]" italics="true" pageId="8" pageNumber="621">Acutocoxae</emphasis>
<bibRefCitation id="EFEC4B46FFF5FF9318F275101111FBEE" author="Rauschert M" box="[145,356,1069,1091]" pageId="8" pageNumber="621" refId="ref9437" refString="Rauschert M. 2017. Neue Gammariden aus dem Weddellmeer. Berlin: published by the author. Available at: http: // tree. bio. ed. ac. uk / software / tracer / (accessed 8 May 2017)." type="url" year="2017">Rauschert, 2017</bibRefCitation>
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is provided.
<bibRefCitation id="EFEC4B46FFF5FF931A7A7510128DFBEF" author="Rauschert M" box="[537,760,1069,1091]" pageId="8" pageNumber="621" refId="ref9437" refString="Rauschert M. 2017. Neue Gammariden aus dem Weddellmeer. Berlin: published by the author. Available at: http: // tree. bio. ed. ac. uk / software / tracer / (accessed 8 May 2017)." type="url" year="2017">Rauschert (2017)</bibRefCitation>
indicated that
<taxonomicName id="4C7D4D34FFF5FF93195775711195FBCD" authorityName="Rauschert" authorityYear="2017" box="[308,480,1100,1121]" class="Malacostraca" family="Podosiridae" genus="Acutocoxae" kingdom="Animalia" order="Amphipoda" pageId="8" pageNumber="621" phylum="Arthropoda" rank="species" species="weddellensis">
<emphasis id="B909EAA5FFF5FF93195775711195FBCD" box="[308,480,1100,1121]" italics="true" pageId="8" pageNumber="621">A. weddellensis</emphasis>
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possesses a rudimentary accessory flagellum. Our examination of the
<typeStatus id="54C68815FFF5FF931AA775561282FB2C" box="[708,759,1131,1152]" pageId="8" pageNumber="621">type</typeStatus>
material reveals a group of small setae, but no accessory flagellum. No accessory flagellum was found in our new species.
<bibRefCitation id="EFEC4B46FFF5FF93194175FB1191FB71" author="Rauschert M" box="[290,484,1222,1245]" pageId="8" pageNumber="621" refId="ref9437" refString="Rauschert M. 2017. Neue Gammariden aus dem Weddellmeer. Berlin: published by the author. Available at: http: // tree. bio. ed. ac. uk / software / tracer / (accessed 8 May 2017)." type="url" year="2017">Rauschert (2017)</bibRefCitation>
provided an illustration of the mandibular molar, which he described as having a strong elevation for grinding. We have been unable to examine this, because both mandibles are missing from the
<typeStatus id="54C68815FFF5FF931966747F114CFAFB" box="[261,313,1346,1367]" pageId="8" pageNumber="621">type</typeStatus>
material. This is different from the toothed flap molar found in our new species. Eyes are prominent, hemispherical, and similar to those of some species in the family
<taxonomicName id="4C7D4D34FFF5FF9319E274A01293FA1E" authority="Stebbing, 1899" authorityName="Stebbing" authorityYear="1899" box="[385,742,1437,1459]" class="Malacostraca" family="Melphidippidae" kingdom="Animalia" order="Amphipoda" pageId="8" pageNumber="621" phylum="Arthropoda" rank="family">Melphidippidae Stebbing, 1899</taxonomicName>
.
</paragraph>
<paragraph id="8BC236B7FFF5FF9318D674DA12A0F9AC" blockId="8.[181,725,1511,1567]" box="[181,725,1511,1536]" pageId="8" pageNumber="621">
<taxonomicName id="4C7D4D34FFF5FF9318D674DA11ADFA52" authorityName="Horton, Ashford &amp; Thurston in Ashford, Horton, Roterman, Thurston, Griffiths &amp; Brandt" authorityYear="2019" box="[181,472,1511,1535]" class="Malacostraca" family="Podosiridae" genus="Acutocoxae" kingdom="Animalia" order="Amphipoda" pageId="8" pageNumber="631" phylum="Arthropoda" rank="species" species="ogilvieae">
<emphasis id="B909EAA5FFF5FF9318D674DA11ADFA52" bold="true" box="[181,472,1511,1535]" italics="true" pageId="8" pageNumber="621">ACUTOCOXAE OGILVIEAE</emphasis>
</taxonomicName>
HORTON, ASHFORD &amp;
</paragraph>
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