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<mods:title id="85C025524CFA092470DF7079E24A6C65">A new classification of the family Ariidae (Osteichthyes: Ostariophysi: Siluriformes) based on combined analyses of morphological and molecular data</mods:title>
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<mods:namePart id="804299179204CC51BDACF889C85E7C0B">Marceniuk, Alexandre Pires</mods:namePart>
<mods:affiliation id="BD15F7A9BC20884BAB7DD7613890B129">Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal da Paraíba, conjunto Presidente Castelo Branco III, João Pessoa, PB 58050 - 000, Brazil &amp; Programa de Pós-Graduação em Ecologia e Conservação, Universidade Estadual da Paraíba, Campina Grande, PB 58429 - 500, Brazil &amp; Departamento de Biologia Estrutural e Funcional, Instituto de Biociências, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Botucatu, SP 18618 - 970, Brazil</mods:affiliation>
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<mods:namePart id="E8D828B89CE49B5B9494658A6E14302B">Oliveira, Claudio</mods:namePart>
<mods:affiliation id="FA02B9D3EF464F7AD9F297098B7C3588">Departamento de Biologia Estrutural e Funcional, Instituto de Biociências, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Botucatu, SP 18618 - 970, Brazil</mods:affiliation>
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<mods:namePart id="37014DC5F8E5EE2E7CB0AED954F0EFE7">Ferraris Jr, Carl J.</mods:namePart>
<mods:affiliation id="038C961E00E976151DA075EE57D7448D">545 NE Floral Pl., Portland, OR 97232, USA</mods:affiliation>
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<mods:date id="DC0D5F1C26DF7756025E8733299C60C3">2024</mods:date>
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<mods:number id="021BC0E7CA250578C383F1D1F0AA7A0A">2023-08-21</mods:number>
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<paragraph id="8BE59A61FFCDFF8B0EB2FF59FB4D4AB4" blockId="42.[1014,1254,143,170]" box="[1014,1254,143,170]" pageId="42" pageNumber="468">
<heading id="D0AD2D0DFFCDFF8B0EB2FF59FB4D4AB4" bold="true" box="[1014,1254,143,170]" centered="true" fontSize="11" level="2" pageId="42" pageNumber="468" reason="2">
<emphasis id="B92E4673FFCDFF8B0EB2FF59FB4D4AB4" bold="true" box="[1014,1254,143,170]" pageId="42" pageNumber="468">
<taxonomicName id="4C5AE1E2FFCDFF8B0EB2FF59FB2D4AB4" authority="Marceniuk &amp; Oliveira &amp; Ferraris Jr, 2024" authorityName="Marceniuk &amp; Oliveira &amp; Ferraris Jr" authorityYear="2024" box="[1014,1158,143,170]" family="Ariidae" genus="Megalosciades" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="genus" status="gen. nov.">
<emphasis id="B92E4673FFCDFF8B0EB2FF59FB2D4AB4" bold="true" box="[1014,1158,143,170]" italics="true" pageId="42" pageNumber="468">Megalosciades</emphasis>
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<taxonomicNameLabel id="A21DFB08FFCDFF8B09CFFF46FB4D4AB4" box="[1163,1254,144,170]" pageId="42" pageNumber="468" rank="genus">gen. nov.</taxonomicNameLabel>
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<subSubSection id="C340C9EAFFCDFF8B0960FF6AFB3A4B2A" pageId="42" pageNumber="468" type="description">
<paragraph id="8BE59A61FFCDFF8B0960FF6AFB124AC8" blockId="42.[1060,1209,188,215]" box="[1060,1209,188,215]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0960FF6AFB124AC8" bold="true" box="[1060,1209,188,215]" pageId="42" pageNumber="468">
(
<figureCitation id="136186E4FFCDFF8B096BFF6AFB234AC8" box="[1071,1160,188,214]" captionStart-0="Figure 1" captionStart-1="Figure 2" captionStart-2="Figure 3" captionStartId-0="3.[129,194,1805,1829]" captionStartId-1="3.[825,890,1803,1827]" captionStartId-2="4.[113,178,1813,1837]" captionTargetBox-1="[153,1434,148,1768]" captionTargetBox-2="[151,708,146,1775]" captionTargetId-2="figure-643@4.[149,717,144,1776]" captionTargetPageId-1="3" captionTargetPageId-2="4" captionText-0="Figure 1. MP analysis.Subfamilies (SF) Galeichthyinae (pink), Bagreinae (bright blue), and Ariinae (dark blue). Tribe (T) Ariini (blue), Cathopsini (orange), Genidentini tribe nov. (brown), and Sciadeini tribe nov. (light green).Subtribe (ST) Ariina (light blue) and Doiichthyina (green). Incertae sedis taxa (IS) (red). Numbers over branches correspond to the bootstrap support." captionText-1="Figure 2. ML analysis. Subfamilies (SF) Galeichthyinae (pink), Bagreinae (bright blue), and Ariinae (dark blue). Tribe (T) Ariini (blue), Cathopsini (orange), Genidentini tribe nov. (brown), and Sciadeini tribe nov. (light green). Subtribe (ST) Ariina (light blue) and Doiichthyina (green). Incertae sedis taxa (IS) (red). Numbers over branches correspond to the bootstrap support." captionText-2="Figure 3. BI analysis.Subfamilies (SF) Galeichthyinae (pink), Bagreinae (bright blue), and Ariinae (dark blue). Tribe (T) Ariini (blue), Cathopsini (orange), Genidentini tribe nov. (brown), and Sciadeini tribe nov. (light green).Subtribe (ST) Ariina (light blue) and Doiichthyina (green). Incertae sedis taxa (IS) (red). Numbers over branches correspond to the bootstrap support." figureDoi-1="http://doi.org/10.5281/zenodo.11240122" figureDoi-2="http://doi.org/10.5281/zenodo.11240126" httpUri-1="https://zenodo.org/record/11240122/files/figure.png" httpUri-2="https://zenodo.org/record/11240126/files/figure.png" pageId="42" pageNumber="468">Figs 13</figureCitation>
,
<figureCitation id="136186E4FFCDFF8B09D7FF6AFB044AC8" box="[1171,1199,188,214]" captionStart="Figure 45" captionStartId="42.[113,178,1952,1976]" captionTargetBox="[114,1458,1431,1924]" captionTargetId="figure-230@42.[114,1458,1431,1924]" captionTargetPageId="42" captionText="Figure 45. Megalosciades augustus Roberts, 1978, Papua New Guinea, photograph by Ricardo Betancur-R., type species of the genus." figureDoi="http://doi.org/10.5281/zenodo.11240211" httpUri="https://zenodo.org/record/11240211/files/figure.png" pageId="42" pageNumber="468">45</figureCitation>
)
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</paragraph>
<paragraph id="8BE59A61FFCDFF8B0E6EFF2BFB3A4B2A" blockId="42.[810,1459,253,308]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0E6EFF2BFBBE4B0B" box="[810,1045,253,277]" italics="true" pageId="42" pageNumber="468">ZooBank registration:</emphasis>
<uri id="FFCB9663FFCDFF8B0977FF2BFB204B2A" pageId="42" pageNumber="468">
urn:lsid:zoobank.org:act:
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.
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<subSubSection id="C340C9EAFFCDFF8A0ED7FE93FDDB4860" lastPageId="43" lastPageNumber="469" pageId="42" pageNumber="468" type="type_taxon">
<paragraph id="8BE59A61FFCDFF8B0ED7FE93FAE14B41" blockId="42.[915,1354,324,351]" box="[915,1354,324,351]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0ED7FE93FAE14B41" bold="true" box="[915,1354,324,351]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0ED7FE93FBB94B40" bold="true" box="[915,1042,324,351]" italics="true" pageId="42" pageNumber="468">
<typeStatus id="54E124C3FFCDFF8B0ED7FE93FC6F4B41" box="[915,964,325,351]" pageId="42" pageNumber="468">Type</typeStatus>
species:
</emphasis>
<taxonomicName id="4C5AE1E2FFCDFF8B0952FE92FAEF4B40" ID-CoL="GQST" authority="Roberts, 1978" authorityName="Roberts" authorityYear="1978" box="[1046,1348,324,351]" family="Ariidae" genus="Arius" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="species" species="augustus">
<emphasis id="B92E4673FFCDFF8B0952FE92FB024B41" bold="true" box="[1046,1193,324,351]" italics="true" pageId="42" pageNumber="468">Arius augustus</emphasis>
<bibRefCitation id="EFCBE790FFCDFF8B09EAFE93FAEF4B40" author="Roberts TR" box="[1198,1348,324,351]" pageId="42" pageNumber="468" pagination="1 - 72" refId="ref31619" refString="Roberts TR. An ichthyological survey of the Fly River in Papua New Guinea with descriptions of new species. Smithsonian Contributions to Zoology 1978; 281: 1 - 72." type="journal article" year="1978">Roberts, 1978</bibRefCitation>
</taxonomicName>
.
</emphasis>
</paragraph>
<paragraph id="8BE59A61FFCDFF8B0904FEB9FB364B96" blockId="42.[1088,1181,367,392]" box="[1088,1181,367,392]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0904FEB9FB364B96" box="[1088,1181,367,392]" italics="true" pageId="42" pageNumber="468">Diagnosis</emphasis>
</paragraph>
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The genus
<taxonomicName id="4C5AE1E2FFCDFF8B0ED1FE43FBB44BB3" authorityName="Marceniuk &amp; Oliveira &amp; Ferraris Jr" authorityYear="2024" box="[917,1055,405,429]" family="Ariidae" genus="Megalosciades" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="genus">
<emphasis id="B92E4673FFCDFF8B0ED1FE43FBB44BB3" box="[917,1055,405,429]" italics="true" pageId="42" pageNumber="468">Megalosciades</emphasis>
</taxonomicName>
is defined based on unique characters of external morphology reported by
<bibRefCitation id="EFCBE790FFCDFF8B09C7FE62FA8E4BD2" author="Roberts TR" box="[1155,1317,436,460]" pageId="42" pageNumber="468" pagination="1 - 72" refId="ref31619" refString="Roberts TR. An ichthyological survey of the Fly River in Papua New Guinea with descriptions of new species. Smithsonian Contributions to Zoology 1978; 281: 1 - 72." type="journal article" year="1978">Roberts (1978)</bibRefCitation>
in the species description: extremely short maxillary barbel; very small eye; broad head and broad mouth.
</paragraph>
<paragraph id="8BE59A61FFCDFF8B0978FDFCFB09485A" blockId="42.[1084,1186,554,580]" box="[1084,1186,554,580]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0978FDFCFB09485A" box="[1084,1186,554,580]" italics="true" pageId="42" pageNumber="468">Etymology</emphasis>
</paragraph>
<paragraph id="8BE59A61FFCDFF8B0E6EFD87FC5948B6" blockId="42.[810,1460,593,680]" pageId="42" pageNumber="468">
Named for the disproportionally large head of the
<typeStatus id="54E124C3FFCDFF8B0872FD87FACF4877" box="[1334,1380,593,617]" pageId="42" pageNumber="468">type</typeStatus>
species in comparison to those observed in
<taxonomicName id="4C5AE1E2FFCDFF8B09E7FDA6FB414896" ID-CoL="63RGQ" authorityName="Muller &amp; Troschel" authorityYear="1849" box="[1187,1258,624,648]" family="Ariidae" genus="Sciades" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="genus">
<emphasis id="B92E4673FFCDFF8B09E7FDA6FB414896" box="[1187,1258,624,648]" italics="true" pageId="42" pageNumber="468">Sciades</emphasis>
</taxonomicName>
and close relatives. Gender: masculine.
</paragraph>
<paragraph id="8BE59A61FFCDFF8B0962FD1BFB1C48F9" blockId="42.[1062,1207,717,743]" box="[1062,1207,717,743]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0962FD1BFB1C48F9" box="[1062,1207,717,743]" italics="true" pageId="42" pageNumber="468">Included species</emphasis>
</paragraph>
<paragraph id="8BE59A61FFCDFF8A0E6EFD22FCA24AB6" blockId="42.[810,1194,756,780]" lastBlockId="43.[129,777,144,168]" lastPageId="43" lastPageNumber="469" pageId="42" pageNumber="468">
<taxonomicName id="4C5AE1E2FFCDFF8B0E6EFD22FB0D4912" authority="Roberts, 1978" authorityName="Roberts" authorityYear="1978" box="[810,1190,756,780]" family="Ariidae" genus="Megalosciades" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="species" species="augustus">
<emphasis id="B92E4673FFCDFF8B0E6EFD22FBA54915" box="[810,1038,756,780]" italics="true" pageId="42" pageNumber="468">Megalosciades augustus</emphasis>
<bibRefCitation id="EFCBE790FFCDFF8B0957FD22FB0D4912" author="Roberts TR" box="[1043,1190,756,780]" pageId="42" pageNumber="468" pagination="1 - 72" refId="ref31619" refString="Roberts TR. An ichthyological survey of the Fly River in Papua New Guinea with descriptions of new species. Smithsonian Contributions to Zoology 1978; 281: 1 - 72." type="journal article" year="1978">Roberts, 1978</bibRefCitation>
</taxonomicName>
.
<emphasis id="B92E4673FFCCFF8A0DC5FF46FECF4AB6" box="[129,356,144,168]" italics="true" pageId="43" pageNumber="469">Habitat and distribution:</emphasis>
Freshwater, southern New
<collectingCountry id="F34DDAF1FFCCFF8A0F21FF46FD074AB6" box="[613,684,144,168]" name="Guinea-Bissau" pageId="43" pageNumber="469">Guinea</collectingCountry>
(
<figureCitation id="136186E4FFCCFF8A0FFEFF46FD514AB6" box="[698,762,144,168]" captionStart="Figure 38" captionStartId="38.[117,182,1915,1939]" captionTargetBox="[247,1333,150,1886]" captionTargetId="figure-7@38.[245,1333,144,1888]" captionTargetPageId="38" captionText="Figure 38. Representative skulls, in dorsal view, and distribution of the subtribe Doiichthyina.A, Brustiarius nox, AUM 47488. B, Paracinetodus carinatus, AUM 47550.C, Cochlefelis spatula, AUM 50296. D, Nedystoma dayi, AUM 47500. E, Aceroichthys dioctes, AUM 47507. F, Pachyula crassilabris, AUM 47509. G, Pararius proximus, AUM 47486.H, Potamosilurus velutinus, AUM 47489.* marine, ** brackish waters, *** freshwater." figureDoi="http://doi.org/10.5281/zenodo.11240197" httpUri="https://zenodo.org/record/11240197/files/figure.png" pageId="43" pageNumber="469">Fig. 38</figureCitation>
).
</paragraph>
<caption id="DF25CAE9FFCDFF8B0D35FA9CFB264F7D" ID-DOI="http://doi.org/10.5281/zenodo.11240209" ID-Zenodo-Dep="11240209" box="[113,1165,1354,1379]" httpUri="https://zenodo.org/record/11240209/files/figure.png" pageId="42" pageNumber="468" startId="42.[113,178,1354,1378]" targetBox="[114,1458,907,1326]" targetPageId="42" targetType="figure">
<paragraph id="8BE59A61FFCDFF8B0D35FA9CFB264F7D" blockId="42.[113,1165,1354,1379]" box="[113,1165,1354,1379]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0D35FA9CFF7D4F7C" bold="true" box="[113,214,1354,1378]" pageId="42" pageNumber="468">Figure 44.</emphasis>
<taxonomicName id="4C5AE1E2FFCDFF8B0D9EFA9CFE1D4F7C" authorityName="Weber" authorityYear="1913" box="[218,438,1354,1378]" family="Ariidae" genus="Doiichthys" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="species" species="novaeguineae">
<emphasis id="B92E4673FFCDFF8B0D9EFA9CFE1D4F7C" box="[218,438,1354,1378]" italics="true" pageId="42" pageNumber="468">Doiichthys novaeguineae</emphasis>
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, New Guinea, photograph by Ricardo Betancur-R., type species of the genus.
</paragraph>
</caption>
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<paragraph id="8BE59A61FFCDFF8B0D35F876FAE44DA7" blockId="42.[113,1359,1952,1977]" box="[113,1359,1952,1977]" pageId="42" pageNumber="468">
<emphasis id="B92E4673FFCDFF8B0D35F876FF7D4DA6" bold="true" box="[113,214,1952,1976]" pageId="42" pageNumber="468">Figure 45.</emphasis>
<taxonomicName id="4C5AE1E2FFCDFF8B0D9EF877FD914DA7" authority="Roberts, 1978" authorityName="Roberts" authorityYear="1978" box="[218,570,1953,1977]" family="Ariidae" genus="Megalosciades" kingdom="Animalia" order="Siluriformes" pageId="42" pageNumber="468" phylum="Chordata" rank="species" species="augustus">
<emphasis id="B92E4673FFCDFF8B0D9EF877FE064DA6" box="[218,429,1953,1977]" italics="true" pageId="42" pageNumber="468">Megalosciades augustus</emphasis>
<bibRefCitation id="EFCBE790FFCDFF8B0CF6F877FD914DA7" author="Roberts TR" box="[434,570,1953,1977]" pageId="42" pageNumber="468" pagination="1 - 72" refId="ref31619" refString="Roberts TR. An ichthyological survey of the Fly River in Papua New Guinea with descriptions of new species. Smithsonian Contributions to Zoology 1978; 281: 1 - 72." type="journal article" year="1978">Roberts, 1978</bibRefCitation>
</taxonomicName>
, Papua New Guinea, photograph by Ricardo Betancur-R., type species of the genus.
</paragraph>
</caption>
<paragraph id="8BE59A61FFCCFF8A0CDFFF11FE444AFF" blockId="43.[411,495,199,225]" box="[411,495,199,225]" pageId="43" pageNumber="469">
<emphasis id="B92E4673FFCCFF8A0CDFFF11FE444AFF" box="[411,495,199,225]" italics="true" pageId="43" pageNumber="469">Remarks</emphasis>
</paragraph>
<paragraph id="8BE59A61FFCCFF8A0DC5FF38FDDB4860" blockId="43.[129,778,238,638]" pageId="43" pageNumber="469">
Over that past two decades,
<taxonomicName id="4C5AE1E2FFCCFF8A0CFCFF38FD0A4B18" authorityName="Roberts" authorityYear="1978" box="[440,673,238,262]" family="Ariidae" genus="Megalosciades" kingdom="Animalia" order="Siluriformes" pageId="43" pageNumber="469" phylum="Chordata" rank="species" species="augustus">
<emphasis id="B92E4673FFCCFF8A0CFCFF38FD0A4B18" box="[440,673,238,262]" italics="true" pageId="43" pageNumber="469">Megalosciades augustus</emphasis>
</taxonomicName>
has been treated by different authors as a valid species in three different genera:
<taxonomicName id="4C5AE1E2FFCCFF8A0C52FEFBFEE04B5A" ID-CoL="32Y8" authorityName="Valenciennes" authorityYear="1840" box="[278,331,301,324]" family="Ariidae" genus="Arius" kingdom="Animalia" order="Siluriformes" pageId="43" pageNumber="469" phylum="Chordata" rank="genus">
<emphasis id="B92E4673FFCCFF8A0C52FEFBFEE04B5A" box="[278,331,301,324]" italics="true" pageId="43" pageNumber="469">Arius</emphasis>
</taxonomicName>
,
<taxonomicName id="4C5AE1E2FFCCFF8A0C13FEFBFE7B4B5A" ID-CoL="63DMN" authorityName="Ogilby" authorityYear="1908" box="[343,464,301,324]" family="Ariidae" genus="Nemapteryx" kingdom="Animalia" order="Siluriformes" pageId="43" pageNumber="469" phylum="Chordata" rank="genus">
<emphasis id="B92E4673FFCCFF8A0C13FEFBFE7B4B5A" box="[343,464,301,324]" italics="true" pageId="43" pageNumber="469">Nemapteryx</emphasis>
</taxonomicName>
, and
<taxonomicName id="4C5AE1E2FFCCFF8A0F4EFEFBFDC94B5A" ID-CoL="63DP2" authorityName="Castelnau" authorityYear="1878" box="[522,610,301,324]" family="Ariidae" genus="Neoarius" kingdom="Animalia" order="Siluriformes" pageId="43" pageNumber="469" phylum="Chordata" rank="genus">
<emphasis id="B92E4673FFCCFF8A0F4EFEFBFDC94B5A" box="[522,610,301,324]" italics="true" pageId="43" pageNumber="469">Neoarius</emphasis>
</taxonomicName>
. Molecular data (Betancur-R. 2009) does not support the inclusion of that species within any of those genera, nor does it appear to be the sister group of any of them. Although BI and ML analyses support the inclusion of
<taxonomicName id="4C5AE1E2FFCCFF8A0DBAFE7CFE494BDC" authorityName="Roberts" authorityYear="1978" box="[254,482,426,450]" family="Ariidae" genus="Megalosciades" kingdom="Animalia" order="Siluriformes" pageId="43" pageNumber="469" phylum="Chordata" rank="species" species="augustus">
<emphasis id="B92E4673FFCCFF8A0DBAFE7CFE494BDC" box="[254,482,426,450]" italics="true" pageId="43" pageNumber="469">Megalosciades augustus</emphasis>
</taxonomicName>
in
<taxonomicName id="4C5AE1E2FFCCFF8A0F45FE7CFDCC4BDC" ID-CoL="3RNW" authorityName=", sensu Kailola" authorityYear="2004" box="[513,615,426,450]" family="Ariidae" genus="Cochlefelis" kingdom="Animalia" order="Siluriformes" pageId="43" pageNumber="469" phylum="Chordata" rank="genus">
<emphasis id="B92E4673FFCCFF8A0F45FE7CFDCC4BDC" box="[513,615,426,450]" italics="true" pageId="43" pageNumber="469">Cochlefelis</emphasis>
</taxonomicName>
, the two genera are externally very distinct (
<figureCitation id="136186E4FFCCFF8A0CE7FE1FFE464BFF" box="[419,493,457,481]" captionStart="Figure 45" captionStartId="42.[113,178,1952,1976]" captionTargetBox="[114,1458,1431,1924]" captionTargetId="figure-230@42.[114,1458,1431,1924]" captionTargetPageId="42" captionText="Figure 45. Megalosciades augustus Roberts, 1978, Papua New Guinea, photograph by Ricardo Betancur-R., type species of the genus." figureDoi="http://doi.org/10.5281/zenodo.11240211" httpUri="https://zenodo.org/record/11240211/files/figure.png" pageId="43" pageNumber="469">Figs 45</figureCitation>
,
<figureCitation id="136186E4FFCCFF8A0CBEFE1FFDBF4BFF" box="[506,532,457,481]" captionStart="Figure 53" captionStartId="48.[115,180,560,584]" captionTargetBox="[116,1460,144,532]" captionTargetId="figure-781@48.[116,1460,144,532]" captionTargetPageId="48" captionText="Figure 53. Potamosilurus macrorhynchus, ZMA 111086, New Guinea, type species of the genus." figureDoi="http://doi.org/10.5281/zenodo.11240227" httpUri="https://zenodo.org/record/11240227/files/figure.png" pageId="43" pageNumber="469">53</figureCitation>
) and the absence of internal morphological data makes it impossible to establish a diagnosis. This is an unstable situation, which may be resolved by assigning that enigmatic species to its own genus, within which it can remain until a discoverery that its phylogenetic position is actually embedded within another genus.
</paragraph>
</subSubSection>
</treatment>
</document>