<documentid="E7998B2D7BB32CF93CEDC18602CD376D"ID-CLB-Dataset="3729"ID-DOI="10.1093/zoolinnean/zlaa174"ID-GBIF-Dataset="a51bb380-e42b-4b8f-9b25-27925807792f"ID-ISSN="0024-4082"ID-Zenodo-Dep="5639160"ID-ZooBank="A68FDF1F-2825-47D8-B9CE-FEB8432896DF"IM.illustrations_approvedBy="jonas"IM.materialsCitations_approvedBy="jonas"IM.metadata_approvedBy="felipe"IM.tables_approvedBy="jonas"IM.taxonomicNames_approvedBy="jonas"IM.treatmentCitations_approvedBy="jonas"IM.treatments_approvedBy="jonas"checkinTime="1635757566263"checkinUser="plazi"docAuthor="Kaiser, Stefanie, Kihara, Terue Cristina, Brix, Saskia, Mohrbeck, Inga, Janssen, Annika & Jennings, Robert M."docDate="2021"docId="037E4E73FF99FF9F0625FC0DFBFBAC41"docLanguage="en"docName="zlaa174.pdf"docOrigin="Zoological Journal of the Linnean Society 193"docStyle="DocumentStyle:36B3BD6A90C22AB4F7F465C853188CC8.7:ZoolJLinnSoc.2017-2023.journal_article"docStyleId="36B3BD6A90C22AB4F7F465C853188CC8"docStyleName="ZoolJLinnSoc.2017-2023.journal_article"docStyleVersion="7"docTitle="Nannoniscus Sars 1870"docType="treatment"docVersion="8"lastPageNumber="1033"masterDocId="FF47360BFF90FF92050CFFD6FF9EAB1E"masterDocTitle="Species boundaries and phylogeographic patterns in new species of Nannoniscus (Janiroidea: Nannoniscidae) from the equatorial Pacific nodule province inferred from mtDNA and morphology"masterLastPageNumber="1071"masterPageNumber="1020"pageNumber="1029"updateTime="1731617104939"updateUser="ExternalLinkService">
<mods:titleid="3C2956AE568B37F348A7A4E9E7B1E5AD">Species boundaries and phylogeographic patterns in new species of Nannoniscus (Janiroidea: Nannoniscidae) from the equatorial Pacific nodule province inferred from mtDNA and morphology</mods:title>
<bibRefCitationid="EF468294FF99FF9B0025FBCEFC12AF52"author="Birstein JA"pageId="9"pageNumber="1029"refId="ref30798"refString="Birstein JA. 1963. Deep-sea isopod crustaceans of the northwestern Pacific Ocean. Institute of Oceanology of the U. S. S. R., Akademii Nauk: Moscow [in Russian with English summary]: 213 pp."type="book"year="1963">Birstein, 1963: 78</bibRefCitation>
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<bibRefCitationid="EF468294FF99FF9B069BFBE0FA8FAF52"author="Siebenaller JF & Hessler RR"box="[919,1297,1078,1100]"pageId="9"pageNumber="1029"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981: 241</bibRefCitation>
<bibRefCitationid="EF468294FF99FF9B06ABFB83FBE1AF74"author="Wilson GDF"box="[935,1151,1109,1131]"pageId="9"pageNumber="1029"pagination="1 - 24"refId="ref34875"refString="Wilson GDF. 2008. A review of taxonomic concepts in the Nannoniscidae (Isopoda, Asellota), with a key to the genera and a description of Nannoniscus oblongus Sars. Zootaxa 1680: 1 - 24."type="journal article"year="2008">Wilson, 2008: 13</bibRefCitation>
<bibRefCitationid="EF468294FF99FF9B003DFB83FC14AF97"author="Brandt A"pageId="9"pageNumber="1029"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt, 2002: 11</bibRefCitation>
<tableCitationid="C655CADEFF99FF9B017AFB27FB4CAE18"box="[1142,1234,1265,1286]"captionStart="Table 3"captionStartId="13.[145,209,196,217]"captionTargetPageId="13"captionText="Table 3. Checklist of described Nannoniscus species with information on their type locality and depth distribution"httpUri="http://table.plazi.org/id/DFA8AFEDFF9DFF9F059DFF12FADDABC4"pageId="9"pageNumber="1029"tableUuid="DFA8AFEDFF9DFF9F059DFF12FADDABC4">Table 3</tableCitation>
<bibRefCitationid="EF468294FF99FF9B06BAFAC6FBC0AE38"author="Birstein JA"box="[950,1118,1296,1318]"pageId="9"pageNumber="1029"refId="ref30798"refString="Birstein JA. 1963. Deep-sea isopod crustaceans of the northwestern Pacific Ocean. Institute of Oceanology of the U. S. S. R., Akademii Nauk: Moscow [in Russian with English summary]: 213 pp."type="book"year="1963">Birstein, 1963</bibRefCitation>
<bibRefCitationid="EF468294FF99FF9B06D1FABAFBE5AE9F"author="Brandt A"box="[989,1147,1388,1410]"pageId="9"pageNumber="1029"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt, 2002</bibRefCitation>
<taxonomicNameid="4CD784E6FF99FF9B06D5FA31FC09AD05"authority="Kaiser, Brix & Jennings"authorityName="Kaiser, Brix & Jennings"authorityYear="2021"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="9"pageNumber="1029"phylum="Arthropoda"rank="species"species="brenkei"status="sp. nov.">
<bibRefCitationid="EF468294FF99FF9B0692F994FBDAAD46"author="Mezhov BV"box="[926,1092,1602,1624]"pageId="9"pageNumber="1029"pagination="126 - 167"refId="ref33446"refString="Mezhov BV. 1986. Bathyal and abyssal Nannoniscidae and Desmosomatidae (Isopoda, Asellota) from Alaska Bay. Archives of the Zoological Museum 1986: 126 - 167."type="journal article"year="1986">Mezhov, 1986</bibRefCitation>
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<bibRefCitationid="EF468294FF99FF9B0625F9B7FBDDAD68"author="Menzies RJ & George RY"box="[809,1091,1633,1655]"pageId="9"pageNumber="1029"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
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<taxonomicNameid="4CD784E6FF99FF9B0136F968FC78ADEC"authority="Kaiser, Brix & Jennings"authorityName="Kaiser, Brix & Jennings French"authorityYear="2021"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="9"pageNumber="1029"phylum="Arthropoda"rank="species"species="magdae"status="sp. nov.">
<taxonomicNameid="4CD784E6FF99FF9B0143F90AFBBEAC0E"authority="Kaiser, Janssen & Mohrbeck"authorityName="Kaiser, Janssen & Mohrbeck French"authorityYear="2021"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="9"pageNumber="1029"phylum="Arthropoda"rank="species"species="menoti"status="sp. nov.">
<bibRefCitationid="EF468294FF99FF9B0625F8CFFC57AC31"author="Mezhov BV"box="[809,969,1817,1839]"pageId="9"pageNumber="1029"pagination="126 - 167"refId="ref33446"refString="Mezhov BV. 1986. Bathyal and abyssal Nannoniscidae and Desmosomatidae (Isopoda, Asellota) from Alaska Bay. Archives of the Zoological Museum 1986: 126 - 167."type="journal article"year="1986">Mezhov, 1986</bibRefCitation>
<bibRefCitationid="EF468294FF99FF9B01E9F8CFFA1CAC30"author="Brandt A"box="[1253,1410,1817,1839]"pageId="9"pageNumber="1029"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt, 2002</bibRefCitation>
<taxonomicNameid="4CD784E6FF99FF9B01F8F8EEFB7FAC72"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="9"pageNumber="1029"phylum="Arthropoda"rank="species"species="muscarius">
<bibRefCitationid="EF468294FF99FF9B06BEF880FB7FAC72"author="Menzies RJ & George RY"box="[946,1249,1878,1900]"pageId="9"pageNumber="1029"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
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<bibRefCitationid="EF468294FF9AFF980782F8C4FEAAAC58"author="Menzies RJ & George RY"pageId="10"pageNumber="1030"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
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,
<taxonomicNameid="4CD784E6FF9AFF980432F8E4FC94AC59"authority="Kaiser, Brix & Kihara"authorityName="Kaiser, Brix & Kihara GSR"authorityYear="2021"box="[318,778,1841,1863]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="10"pageNumber="1030"phylum="Arthropoda"rank="species"species="pedro"status="sp. nov.">
<taxonomicNameid="4CD784E6FF9AFF98040CF886FC9BAC7B"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"box="[256,773,1872,1894]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="10"pageNumber="1030"phylum="Arthropoda"rank="species"species="perunis">
<bibRefCitationid="EF468294FF9AFF9804F9F886FC9BAC7B"author="Menzies RJ & George RY"box="[501,773,1872,1894]"pageId="10"pageNumber="1030"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
<taxonomicNameid="4CD784E6FF9BFF99076EFBE1FD99AF74"authority="Siebenaller & Hessler, 1981"authorityName="Siebenaller & Hessler"authorityYear="1981"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="species"species="teres">
<bibRefCitationid="EF468294FF9BFF9905C0FB83FD99AF74"author="Siebenaller JF & Hessler RR"box="[204,519,1109,1131]"pageId="11"pageNumber="1031"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981</bibRefCitation>
. Sampled haplotypes are shown as solid circles with circle area proportional to the number of individuals possessing that haplotype; open circles represent unsampled haplotypes required to connect the network. The number of mutational steps between haplotypes are shown along connecting lines. The colours represent sampling locations as indicated in the legend. Species described herein are indicated with bounding boxes.
Genetic divergence (p-distance) in relation to geographic distance in kilometres for
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<bibRefCitationid="EF468294FF9BFF9904B6FB42FF25AFD6"author="Siebenaller JF & Hessler RR"pageId="11"pageNumber="1031"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981: 241</bibRefCitation>
;
<bibRefCitationid="EF468294FF9BFF9905C6FB65FE11AFD6"author="Wilson GDF"box="[202,399,1203,1224]"pageId="11"pageNumber="1031"pagination="1 - 24"refId="ref34875"refString="Wilson GDF. 2008. A review of taxonomic concepts in the Nannoniscidae (Isopoda, Asellota), with a key to the genera and a description of Nannoniscus oblongus Sars. Zootaxa 1680: 1 - 24."type="journal article"year="2008">Wilson, 2008: 14</bibRefCitation>
):
</emphasis>
Pereonal tergites projecting laterally from pereopodal coxae; pereonites 6–7 dorsal articulation absent medially. Pleotelson distinctly shorter than pereonites 5–7 combined. Antennula with 5 segments, distal article bulbous, article 4 distal margin with ventromedial angular projection. Mandible with 3-segmented palp. Pereopods I–II equally robust. Uropods biramous or rarely uniramous.
), they occur mainly at slope and abyssal depth, with two species recorded from the hadal Zone (
<taxonomicNameid="4CD784E6FF9BFF99078FF9A8FE28ADAF"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="species"species="ovatus">
<bibRefCitationid="EF468294FF9BFF99059DF94AFE28ADAF"author="Menzies RJ & George RY"box="[145,438,1692,1714]"pageId="11"pageNumber="1031"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
</taxonomicName>
and
<taxonomicNameid="4CD784E6FF9BFF9904F8F94BFEB5ADCE"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="species"species="perunis">
<bibRefCitationid="EF468294FF9BFF990775F94AFEB5ADCE"author="Menzies RJ & George RY"pageId="11"pageNumber="1031"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
</taxonomicName>
;
<tableCitationid="C655CADEFF9BFF990435F96CFE0EADCE"box="[313,400,1722,1744]"captionStart="Table 3"captionStartId="13.[145,209,196,217]"captionTargetPageId="13"captionText="Table 3. Checklist of described Nannoniscus species with information on their type locality and depth distribution"httpUri="http://table.plazi.org/id/DFA8AFEDFF9DFF9F059DFF12FADDABC4"pageId="11"pageNumber="1031"tableUuid="DFA8AFEDFF9DFF9F059DFF12FADDABC4">Table 3</tableCitation>
due to the following characters: antennula article 4 distal margin with ventromedial angular projection, antennula terminal article 5 bulbous, pereopods 1 and 2 equally robust, lack of ventral articulation between pereonites 6 and 7. However, the genus
, thus far, is largely defined by a combination of plesiomorphic characters, such as uropods inserting posteroventrally close to the anus (
<bibRefCitationid="EF468294FF9BFF99063DFB06FC5BAFFB"author="Wilson GDF"box="[817,965,1232,1254]"pageId="11"pageNumber="1031"pagination="1 - 24"refId="ref34875"refString="Wilson GDF. 2008. A review of taxonomic concepts in the Nannoniscidae (Isopoda, Asellota), with a key to the genera and a description of Nannoniscus oblongus Sars. Zootaxa 1680: 1 - 24."type="journal article"year="2008">Wilson, 2008</bibRefCitation>
), defining the family
<taxonomicNameid="4CD784E6FF9BFF9901B3FB06FAF2AFF8"authorityName="Siebenaller & Hessler"authorityYear="1977"box="[1215,1388,1232,1254]"class="Malacostraca"family="Nannoniscidae"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="family">Nannoniscidae</taxonomicName>
, as well as synapomorphic characters, such as a bulbous terminal article of the antennula, a specialized antennula article 4 and fusion of pereonites 6 and 7 that characterize a cluster of nannoniscid genera containing
<taxonomicNameid="4CD784E6FF9BFF990168FA5EFC5FAEA2"authority="Siebenaller & Hessler, 1981"authorityName="Siebenaller & Hessler"authorityYear="1981"class="Malacostraca"family="Nannoniscidae"genus="Rapaniscus"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="genus">
<bibRefCitationid="EF468294FF9BFF9901FDFA5EFC5FAEA2"author="Siebenaller JF & Hessler RR"pageId="11"pageNumber="1031"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981</bibRefCitation>
</taxonomicName>
and
<taxonomicNameid="4CD784E6FF9BFF9906F7FA70FCFFAEC4"authority="Siebenaller & Hessler, 1981"authorityName="Siebenaller & Hessler"authorityYear="1981"class="Malacostraca"family="Nannoniscidae"genus="Regabellator"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="genus">
<bibRefCitationid="EF468294FF9BFF99019EFA70FCFFAEC4"author="Siebenaller JF & Hessler RR"pageId="11"pageNumber="1031"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981</bibRefCitation>
</taxonomicName>
.
<bibRefCitationid="EF468294FF9BFF990663FA13FB8FAEC5"author="Wilson GDF"box="[879,1041,1477,1499]"pageId="11"pageNumber="1031"pagination="1 - 24"refId="ref34875"refString="Wilson GDF. 2008. A review of taxonomic concepts in the Nannoniscidae (Isopoda, Asellota), with a key to the genera and a description of Nannoniscus oblongus Sars. Zootaxa 1680: 1 - 24."type="journal article"year="2008">Wilson (2008)</bibRefCitation>
states that the broad body form with laterally projecting pereonite tergites is present in all
), others have a slender body (body length> 4.5 times pereonite 1 width) with lateral tergites that extend only slightly, if at all (e.g.
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<taxonomicNameid="4CD784E6FF9BFF99016DF9A8FB7BAD8D"authorityName="Menzies & George"authorityYear="1972"box="[1121,1253,1662,1683]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="11"pageNumber="1031"phylum="Arthropoda"rank="species"species="perunis">
and species described herein). Overall, the genus comprises species with diverse morphologies mostly referring to the shape of the pleotelson and the presence of a ventral spine on the female operculum and/or pereonite 7. While
<taxonomicNameid="4CD784E6FF9CFF9E0426FA7BFE23AEDC"authorityName="Menzies & George"authorityYear="1972"box="[298,445,1453,1474]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="12"pageNumber="1032"phylum="Arthropoda"rank="species"species="muscarius">
, ventral spines are present both on the female operculum and the seventh pereonite. The presence or absence of a ventral opercular spine has been found a useful character to separate the nannoniscid genera
<taxonomicNameid="4CD784E6FF9CFF9E049BF9B3FD97AD64"authorityName="Kaiser & Brix"authorityYear="2018"box="[407,521,1637,1658]"class="Malacostraca"family="Nannoniscidae"genus="Ketosoma"kingdom="Animalia"order="Isopoda"pageId="12"pageNumber="1032"phylum="Arthropoda"rank="genus">
<bibRefCitationid="EF468294FF9CFF9E05AFF954FEA7AD86"author="Hessler RR"box="[163,313,1666,1688]"pageId="12"pageNumber="1032"pagination="1 - 185"refId="ref32351"refString="Hessler RR. 1970. The Desmosomatidae (Isopoda, Asellota) of the Gay Head-Bermuda transect. Bulletin of the Scripps Institution of Oceanography 15: 1 - 185."type="journal article"year="1970">Hessler, 1970</bibRefCitation>
</taxonomicName>
(
<bibRefCitationid="EF468294FF9CFF9E044BF954FD8FAD86"author="Kaiser S & Brix S & Kihara TC & Janssen A & Jennings RM"box="[327,529,1666,1688]"pageId="12"pageNumber="1032"pagination="151 - 179"refId="ref32837"refString="Kaiser S, Brix S, Kihara TC, Janssen A, Jennings RM. 2018. Integrative species delimitation in the deep-sea genus Thaumastosoma Hessler, 1970 (Isopoda, Asellota, Nannoniscidae) reveals a new genus and species from the Atlantic and central Pacific abyss. Deep Sea Research Part II: Topical Studies in Oceanography 148: 151 - 179."type="journal article"year="2018">
<taxonomicNameid="4CD784E6FF9CFF9E0449F916FE4BADCB"authorityName="Siebenaller & Hessler"authorityYear="1981"box="[325,469,1728,1749]"class="Malacostraca"family="Nannoniscidae"genus="Regabellator"kingdom="Animalia"order="Isopoda"pageId="12"pageNumber="1032"phylum="Arthropoda"rank="genus">Regabellator</taxonomicName>
<taxonomicNameid="4CD784E6FF9CFF9E078FF8CAFD3CAC4E"authority="Siebenaller & Hessler, 1981"authorityName="Siebenaller & Hessler"authorityYear="1981"class="Malacostraca"family="Nannoniscidae"genus="Rapaniscus"kingdom="Animalia"order="Isopoda"pageId="12"pageNumber="1032"phylum="Arthropoda"rank="species"species="dewdneyi">
<bibRefCitationid="EF468294FF9CFF9E0426F8ECFD3CAC4E"author="Siebenaller JF & Hessler RR"box="[298,674,1850,1872]"pageId="12"pageNumber="1032"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981</bibRefCitation>
<bibRefCitationid="EF468294FF9CFF9E0746F88FFD41AC70"author="Brandt A"box="[586,735,1881,1903]"pageId="12"pageNumber="1032"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt, 2002</bibRefCitation>
, based on sampling area of extant lineages. Brackets above and below branches list potential locations and their 95% highest posterior distributions, respectively.
; most species within the genus possess biramous uropods, while a lack a uropodal exopod is reported for two species (
<taxonomicNameid="4CD784E6FF9CFF9E06DFFA3CFBDCAEE1"authorityName="Menzies & George"authorityYear="1972"box="[979,1090,1514,1535]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="12"pageNumber="1032"phylum="Arthropoda"rank="species"species="ovatus">
<bibRefCitationid="EF468294FF9CFF9E0171F9B2FA80AD67"author="Merrin KL"box="[1149,1310,1636,1658]"pageId="12"pageNumber="1032"refId="ref33356"refString="Merrin KL. 2007. New Zealand and south-east Australian Ilyarachninae (Isopoda: Asellota: Munnopsidae) and their worldwide relationships. Ph. D. Thesis, University of Canterbury."type="book"year="2007">Merrin, 2007</bibRefCitation>
)
</taxonomicName>
; however, there are several genera (e.g. within
<taxonomicNameid="4CD784E6FF9CFF9E01D7F954FA01AD86"authorityName="G. O. Sars"authorityYear="1897"box="[1243,1439,1666,1688]"class="Malacostraca"family="Desmosomatidae"kingdom="Animalia"order="Isopoda"pageId="12"pageNumber="1032"phylum="Arthropoda"rank="family">Desmosomatidae</taxonomicName>
<bibRefCitationid="EF468294FF9CFF9E064FF916FBADADCB"author="Just J & Wilson GDF"box="[835,1075,1728,1750]"pageId="12"pageNumber="1032"pagination="1 - 29"refId="ref32707"refString="Just J, Wilson GDF. 2007. Revision of Austrosignum Hodgson and Munnogonium George & Stromberg (Paramunnidae) with descriptions of eight new genera and two new species (Crustacea: Isopoda: Asellota). Zootaxa 1515: 1 - 29."type="journal article"year="2007">Just & Wilson, 2007</bibRefCitation>
;
<bibRefCitationid="EF468294FF9CFF9E014FF916FAB6ADCB"author="Brix S & Bruce NL"box="[1091,1320,1728,1750]"pageId="12"pageNumber="1032"pagination="482 - 492"refId="ref31449"refString="Brix S, Bruce NL. 2008. Prochelator tupuhi sp. nov., the first record of Desmosomatidae Sars, 1897 (Crustacea: Isopoda) from New Zealand waters. Zootaxa 1866: 482 - 492."type="journal article"year="2008">Brix & Bruce, 2008</bibRefCitation>
;
<bibRefCitationid="EF468294FF9CFF9E0034F916FC44ADEA"author="Kaiser S & Marner M"pageId="12"pageNumber="1032"pagination="171 - 184"refId="ref32902"refString="Kaiser S, Marner M. 2012. A new species of Pentaceration Just, 2009 (Isopoda, Asellota, Paramunnidae) from the Challenger Plateau, New Zealand (Tasman Sea). Zoosystematics and Evolution 88: 171 - 184."type="journal article"year="2012">Kaiser & Marner, 2012</bibRefCitation>
, the presence or absence of the uropodal exopodite represents a valuable character at the species, but not at the generic level [see also
<bibRefCitationid="EF468294FF9DFF9F05F4FA2EFE43AD10"author="Brix S & Bruce NL"box="[248,477,1528,1550]"pageId="13"pageNumber="1033"pagination="482 - 492"refId="ref31449"refString="Brix S, Bruce NL. 2008. Prochelator tupuhi sp. nov., the first record of Desmosomatidae Sars, 1897 (Crustacea: Isopoda) from New Zealand waters. Zootaxa 1866: 482 - 492."type="journal article"year="2008">Brix & Bruce (2008)</bibRefCitation>
<bibRefCitationid="EF468294FF9DFF9F0420FEECFE20AA4E"author="Birstein JA"box="[300,446,314,336]"pageId="13"pageNumber="1033"refId="ref30798"refString="Birstein JA. 1963. Deep-sea isopod crustaceans of the northwestern Pacific Ocean. Institute of Oceanology of the U. S. S. R., Akademii Nauk: Moscow [in Russian with English summary]: 213 pp."type="book"year="1963">Birstein, 1963</bibRefCitation>
<bibRefCitationid="EF468294FF9DFF9F0444FE64FE4EAAD6"author="Brandt A"box="[328,464,434,456]"pageId="13"pageNumber="1033"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt, 2002</bibRefCitation>
</taxonomicName>
</th>
<tdid="7636945BFF9D006D07CDFE64FBB0AAD6"box="[705,1070,434,456]"gridcol="1"gridrow="5"pageId="13"pageNumber="1033">Angola Basin, SE Atlantic</td>
<taxonomicNameid="4CD784E6FF9DFF9F059DFDB1FE65A962"authority="Kaiser, Brix & Jennings"authorityName="Kaiser, Brix & Jennings"authorityYear="2021"box="[145,507,614,636]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="brenkei">
<tdid="7636945BFF9D006D07CDFDB0FBB0A962"box="[705,1070,614,636]"gridcol="1"gridrow="11"pageId="13"pageNumber="1033">Eastern German licence area, CCZ</td>
<bibRefCitationid="EF468294FF9DFF9F0403FD16FE04A9C8"author="Mezhov BV"box="[271,410,704,726]"pageId="13"pageNumber="1033"pagination="126 - 167"refId="ref33446"refString="Mezhov BV. 1986. Bathyal and abyssal Nannoniscidae and Desmosomatidae (Isopoda, Asellota) from Alaska Bay. Archives of the Zoological Museum 1986: 126 - 167."type="journal article"year="1986">Mezhov, 1986</bibRefCitation>
</th>
<tdid="7636945BFF9D006D07CDFD16FBB0A9C8"box="[705,1070,704,726]"gridcol="1"gridrow="14"pageId="13"pageNumber="1033">Gulf of Alaska, NE Pacific</td>
<taxonomicNameid="4CD784E6FF9DFF9F059DFD09FDB0A9EA"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"box="[145,558,734,756]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="detrimentus">
<bibRefCitationid="EF468294FF9DFF9F043DFD08FDB0A9EA"author="Menzies RJ & George RY"box="[305,558,734,756]"pageId="13"pageNumber="1033"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
</taxonomicName>
</th>
<tdid="7636945BFF9D006D07CDFD08FBB0A9EA"box="[705,1070,734,756]"gridcol="1"gridrow="15"pageId="13"pageNumber="1033">Peru-Chile-Trench, SE Pacific</td>
<taxonomicNameid="4CD784E6FF9DFF9F059DFD2BFE37A80C"authority="Kaiser & Kihara"authorityName="Kaiser & Kihara & Brix & Mohrbeck & Janssen & Jennings"authorityYear="2021"box="[145,425,764,786]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="hilario">
<tdid="7636945BFF9D006D07CDFD2AFBB0A80C"box="[705,1070,764,786]"gridcol="1"gridrow="16"pageId="13"pageNumber="1033">Eastern German licence area, CCZ</td>
<bibRefCitationid="EF468294FF9DFF9F0402FC66FE04A8D8"author="Mezhov BV"box="[270,410,944,966]"pageId="13"pageNumber="1033"pagination="126 - 167"refId="ref33446"refString="Mezhov BV. 1986. Bathyal and abyssal Nannoniscidae and Desmosomatidae (Isopoda, Asellota) from Alaska Bay. Archives of the Zoological Museum 1986: 126 - 167."type="journal article"year="1986">Mezhov, 1986</bibRefCitation>
</th>
<tdid="7636945BFF9D006D07CDFC66FBB0A8D8"box="[705,1070,944,966]"gridcol="1"gridrow="22"pageId="13"pageNumber="1033">Gulf of Alaska, USA</td>
<bibRefCitationid="EF468294FF9DFF9F0405FC18FE0FA8FA"author="Brandt A"box="[265,401,974,996]"pageId="13"pageNumber="1033"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt, 2002</bibRefCitation>
)
</taxonomicName>
</th>
<tdid="7636945BFF9D006D07CDFC18FBB0A8FA"box="[705,1070,974,996]"gridcol="1"gridrow="23"pageId="13"pageNumber="1033">Angola Basin, SE Atlantic</td>
<taxonomicNameid="4CD784E6FF9DFF9F059DFBDDFD83AF3E"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"box="[145,541,1034,1056]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="muscarius">
<bibRefCitationid="EF468294FF9DFF9F042DFBDCFD83AF3E"author="Menzies RJ & George RY"box="[289,541,1034,1056]"pageId="13"pageNumber="1033"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
</taxonomicName>
</th>
<tdid="7636945BFF9D006D07CDFBDCFBB0AF3E"box="[705,1070,1034,1056]"gridcol="1"gridrow="25"pageId="13"pageNumber="1033">Peru-Chile-Trench, SE Pacific</td>
<taxonomicNameid="4CD784E6FF9DFF9F059DFB91FE6BAF42"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"box="[145,501,1094,1116]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="ovatus">
<bibRefCitationid="EF468294FF9DFF9F05F4FB90FE6BAF42"author="Menzies RJ & George RY"box="[248,501,1094,1116]"pageId="13"pageNumber="1033"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
</taxonomicName>
</th>
<tdid="7636945BFF9D006D07CDFB90FBB0AF42"box="[705,1070,1094,1116]"gridcol="1"gridrow="27"pageId="13"pageNumber="1033">Peru-Chile-Trench, SE Pacific</td>
<taxonomicNameid="4CD784E6FF9DFF9F059DFB55FE61AF87"authority="Menzies & George, 1972"authorityName="Menzies & George"authorityYear="1972"box="[145,511,1155,1177]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="perunis">
<bibRefCitationid="EF468294FF9DFF9F040EFB55FE61AF87"author="Menzies RJ & George RY"box="[258,511,1155,1177]"pageId="13"pageNumber="1033"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
</taxonomicName>
</th>
<tdid="7636945BFF9D006D07CDFB55FBB0AF87"box="[705,1070,1155,1177]"gridcol="1"gridrow="29"pageId="13"pageNumber="1033">Peru-Chile-Trench, SE Pacific</td>
<tdid="7636945BFF9D006D07CDFB69FBB0AFCB"box="[705,1070,1215,1237]"gridcol="1"gridrow="31"pageId="13"pageNumber="1033">Norwegian See, off Greenland</td>
<tdid="7636945BFF9D006D07CDFACFFBB0AE31"box="[705,1070,1305,1327]"gridcol="1"gridrow="34"pageId="13"pageNumber="1033">S of Jan Mayen, Arctic Ocean</td>
<bibRefCitationid="EF468294FF9DFF9F05E8FAE1FD9BAE53"author="Siebenaller JF & Hessler RR"box="[228,517,1335,1357]"pageId="13"pageNumber="1033"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981</bibRefCitation>
<bibRefCitationid="EF468294FF9DFF9F05A5F9C1FDD6AD32"author="Siebenaller JF & Hessler RR"box="[169,584,1559,1581]"pageId="13"pageNumber="1033"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler (1981)</bibRefCitation>
and
<bibRefCitationid="EF468294FF9DFF9F0795F9C1FF41AD55"author="Brandt A"pageId="13"pageNumber="1033"pagination="1 - 36"refId="ref31184"refString="Brandt A. 2002. New species of Nannoniscidae (Crustacea, Isopoda) and Saetoniscus n. gen. from the deep sea of the Angola Basin. Zootaxa 88: 1 - 36."type="journal article"year="2002">Brandt (2002)</bibRefCitation>
<taxonomicNameid="4CD784E6FF9DFF9F05F7F9A5FE3CAD96"authorityName="Menzies & George"authorityYear="1972"box="[251,418,1651,1672]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="muscarius">
<taxonomicNameid="4CD784E6FF9DFF9F046DF944FE4DADB9"authorityName="Menzies & George"authorityYear="1972"box="[353,467,1682,1703]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="ovatus">
(= uniramous uropods). However, these species are notsingle occurrences but representative for this heterogeneous group. Up to now there has been no rigorous phylogenetic assessment of all
, and it is not the purpose of the present study to address this issue. Nevertheless, as a prelude, the position of
<taxonomicNameid="4CD784E6FF9DFF9F0625FA0CFB6DAEF1"authority="(Menzies & George, 1972)"baseAuthorityName="Menzies & George"baseAuthorityYear="1972"box="[809,1267,1497,1519]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="coalescus">
<bibRefCitationid="EF468294FF9DFF9F06C5FA0FFB75AEF0"author="Menzies RJ & George RY"box="[969,1259,1497,1519]"pageId="13"pageNumber="1033"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George, 1972</bibRefCitation>
)
</taxonomicName>
is discussed. The species had been first described as
<taxonomicNameid="4CD784E6FF9DFF9F0009FA2FFC3AAD35"authorityName="Menzies & George"authorityYear="1972"class="Malacostraca"family="Desmosomatidae"genus="Desmosoma"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="coalescum">
<taxonomicNameid="4CD784E6FF9DFF9F0159F9C0FABDAD32"authorityName="G. O. Sars"authorityYear="1897"box="[1109,1315,1558,1580]"class="Malacostraca"family="Desmosomatidae"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="family">Desmosomatidae</taxonomicName>
<bibRefCitationid="EF468294FF9DFF9F01E6F9E3FC51AD77"author="Siebenaller JF & Hessler RR"pageId="13"pageNumber="1033"pagination="17 - 44"refId="ref34340"refString="Siebenaller JF, Hessler RR. 1977. The Nannoniscidae (Isopoda, Asellota): Hebefustis n. gen. and Nannoniscoides Hansen. Transactions of San Diego Society of Natural History 19: 17 - 44."type="journal article"year="1977">Siebenaller & Hessler, 1977</bibRefCitation>
due to the bulbous terminal article of the antennula as well as fusion of pereonites 6 and 7. Our morphological analyses of the
<bibRefCitationid="EF468294FF9DFF9F01BBF966FCEEADFA"author="Menzies RJ & George RY"pageId="13"pageNumber="1033"pagination="1 - 124"refId="ref33331"refString="Menzies RJ, George RY. 1972. Isopod Crustacea of the Peru- Chile Trench. Anton Bruun Report 9: 1 - 124."type="book chapter"year="1972">Menzies & George (1972</bibRefCitation>
: p. 9.48) suggest the species belongs to
<taxonomicNameid="4CD784E6FF9DFF9F0625F938FC2FAC1D"authorityName="Siebenaller & Hessler"authorityYear="1981"box="[809,945,1774,1795]"class="Malacostraca"family="Nannoniscidae"genus="Rapaniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="genus">
owing to a broadened pereopod I carpus bearing several long robust setae (
<bibRefCitationid="EF468294FF9DFF9F01E8F8DAFC4DAC5E"author="Siebenaller JF & Hessler RR"pageId="13"pageNumber="1033"pagination="227 - 250"refId="ref34306"refString="Siebenaller JF, Hessler RR. 1981. The genera of the Nannoniscidae (Isopoda, Asellota). Transactions of the San Diego Society of Natural History 19: 227 - 250."type="journal article"year="1981">Siebenaller & Hessler, 1981</bibRefCitation>
). Therefore,
<taxonomicNameid="4CD784E6FF9DFF9F0170F8FDFA8BAC21"baseAuthorityName="Menzies & George"baseAuthorityYear="1972"box="[1148,1301,1834,1856]"class="Malacostraca"family="Nannoniscidae"genus="Nannoniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="species"species="coalescus">
<taxonomicNameid="4CD784E6FF9DFF9F06D9F89CFBC3AC41"authorityName="Siebenaller & Hessler"authorityYear="1981"box="[981,1117,1866,1887]"class="Malacostraca"family="Nannoniscidae"genus="Rapaniscus"kingdom="Animalia"order="Isopoda"pageId="13"pageNumber="1033"phylum="Arthropoda"rank="genus">