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<document ID-DOI="10.26107/RBZ-2021-0056" ID-ISSN="2345-7600" ID-Zenodo-Dep="7174178" ID-ZooBank="5B5371C9-3B1D-4A21-B907-8B10D66BD54D" approvalRequired="23" approvalRequired_for_textStreams="20" approvalRequired_for_treatments="3" checkinTime="1665290568899" checkinUser="felipe" docAuthor="Hui, Tan Heok" docDate="2021" docId="0397F038FFF8FFB3FF04F953848CF7EF" docLanguage="en" docName="RafflesBZool.69.336363.pdf" docOrigin="Raffles Bulletin of Zoology 69" docStyle="DocumentStyle:AF09A0581917EACD12E7F0991C3E7C26.4:RafflesBZool.2019-.journal_article" docStyleId="AF09A0581917EACD12E7F0991C3E7C26" docStyleName="RafflesBZool.2019-.journal_article" docStyleVersion="4" docTitle="Hypergastromyzon abditus Hui 2021, new species" docType="treatment" docVersion="2" lastPageNumber="349" masterDocId="FFAE8840FFF1FFBEFFEDFFF1814FFFED" masterDocTitle="Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)" masterLastPageNumber="363" masterPageNumber="336" pageNumber="345" updateTime="1665305855623" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Hui, Tan Heok</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Raffles Bulletin of Zoology</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2021</mods:date>
<mods:detail type="pubDate">
<mods:number>2021-09-07</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>69</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>336</mods:start>
<mods:end>363</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.26107/RBZ-2021-0056</mods:identifier>
<mods:identifier type="ISSN">2345-7600</mods:identifier>
<mods:identifier type="Zenodo-Dep">7174178</mods:identifier>
<mods:identifier type="ZooBank">5B5371C9-3B1D-4A21-B907-8B10D66BD54D</mods:identifier>
</mods:mods>
<treatment LSID="urn:lsid:plazi:treatment:0397F038FFF8FFB3FF04F953848CF7EF" httpUri="http://treatment.plazi.org/id/0397F038FFF8FFB3FF04F953848CF7EF" lastPageId="13" lastPageNumber="349" pageId="9" pageNumber="345">
<subSubSection box="[233,678,1698,1722]" pageId="9" pageNumber="345" type="nomenclature">
<paragraph blockId="9.[233,678,1698,1754]" box="[233,678,1698,1722]" pageId="9" pageNumber="345">
<heading bold="true" box="[233,678,1698,1722]" centered="true" fontSize="10" level="2" pageId="9" pageNumber="345" reason="2">
<emphasis bold="true" box="[233,678,1698,1722]" pageId="9" pageNumber="345">
<taxonomicName authority="Hui, 2021" authorityName="Hui" authorityYear="2021" box="[233,529,1698,1722]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="9" pageNumber="345" phylum="Chordata" rank="species" species="abditus" status="new species">
<emphasis bold="true" box="[233,529,1698,1722]" italics="true" pageId="9" pageNumber="345">Hypergastromyzon abditus</emphasis>
</taxonomicName>
,
<taxonomicNameLabel box="[545,678,1698,1722]" pageId="9" pageNumber="345" rank="species">new species</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection box="[375,536,1730,1754]" pageId="9" pageNumber="345" type="description">
<paragraph blockId="9.[233,678,1698,1754]" box="[375,536,1730,1754]" pageId="9" pageNumber="345">
(
<figureCitation box="[383,460,1730,1754]" captionStart="Fig" captionStartId="8.[113,148,1516,1538]" captionTargetBox="[113,749,189,1500]" captionTargetId="figure-13@8.[113,749,189,1500]" captionTargetPageId="8" captionText="Fig. 5. Oral views. A, Hypergastromyzon humilis, CMK 10574, 31.5 mm SL; B, Hypergastromyzon abditus, MZB 17233, 37.2 mm SL; C, Hypergastromyzon sambas, MZB 17235, 32.4 mm SL." figureDoi="http://doi.org/10.5281/zenodo.7174188" httpUri="https://zenodo.org/record/7174188/files/figure.png" pageId="9" pageNumber="345">Figs. 5</figureCitation>
,
<figureCitation box="[474,528,1730,1754]" captionStart-0="Fig" captionStart-1="Fig" captionStart-2="Fig" captionStart-3="Fig" captionStartId-0="10.[113,148,1388,1410]" captionStartId-1="10.[113,148,2064,2086]" captionStartId-2="11.[136,171,1463,1485]" captionStartId-3="12.[113,148,1412,1434]" captionTargetBox-0="[157,1408,189,1373]" captionTargetBox-1="[113,1451,1465,2049]" captionTargetBox-2="[137,1465,191,1445]" captionTargetBox-3="[113,1451,189,1397]" captionTargetId-0="figure-16@10.[157,1408,189,1373]" captionTargetId-1="figure-14@10.[113,1451,1465,2049]" captionTargetId-2="figure-8@11.[116,1494,169,1465]" captionTargetId-3="figure-13@12.[113,1451,189,1397]" captionTargetPageId-0="10" captionTargetPageId-1="10" captionTargetPageId-2="11" captionTargetPageId-3="12" captionText-0="Fig. 7. Hypergastromyzon abditus, MZB 17233, 37.2 mm SL, holotype, male; composite of dorsal, lateral, and ventral views." captionText-1="Fig. 8. Hypergastromyzon abditus, ZRC 61400, 40.3 mm SL, paratype, male; close-up of lateral view of anterior half of body showing tubercles on head, body, and pectoral fin." captionText-2="Fig. 9. Hypergastromyzon abditus, ZRC 61397, ca. 38 mm SL, female; freshly preserved colouration; composite of dorsal, lateral, and ventral views." captionText-3="Fig. 10. Hypergastromyzon abditus, ZRC 61397, 38.0 mm SL, female; composite of dorsal, lateral, and ventral views." figureDoi-0="http://doi.org/10.5281/zenodo.7174192" figureDoi-1="http://doi.org/10.5281/zenodo.7174196" figureDoi-2="http://doi.org/10.5281/zenodo.7174198" figureDoi-3="http://doi.org/10.5281/zenodo.7174200" httpUri-0="https://zenodo.org/record/7174192/files/figure.png" httpUri-1="https://zenodo.org/record/7174196/files/figure.png" httpUri-2="https://zenodo.org/record/7174198/files/figure.png" httpUri-3="https://zenodo.org/record/7174200/files/figure.png" pageId="9" pageNumber="345">710</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection pageId="9" pageNumber="345" type="materials_examined">
<paragraph blockId="9.[136,775,1794,2010]" pageId="9" pageNumber="345">
<emphasis bold="true" box="[136,362,1794,1818]" pageId="9" pageNumber="345">Material examined.</emphasis>
<materialsCitation accessionNumber="MZB17233" collectingDate="2007-08-11" collectionCode="MZB" collectorName="H. H. Tan" county="Katingan" elevation="3" latitude="-0.75018334" location="Bukit RayaBukit Baka National Park" longLatPrecision="1" longitude="112.286385" municipality="Mendawai" pageId="9" pageNumber="345" specimenCount="1" stateProvince="Kalimantan Tengah" typeStatus="holotype">
<typeStatus box="[371,474,1794,1818]" pageId="9" pageNumber="345">Holotype</typeStatus>
:
<accessionNumber box="[488,615,1794,1818]" httpUri="http://www.ncbi.nlm.nih.gov/protein/MZB17233" pageId="9" pageNumber="345">
<collectionCode box="[488,548,1794,1818]" country="Indonesia" httpUri="http://grbio.org/cool/b9gz-izvg" name="Museum Zoologicum Bogoriense" pageId="9" pageNumber="345" type="Museum">MZB</collectionCode>
17233
</accessionNumber>
,
<quantity box="[629,726,1794,1818]" metricMagnitude="-2" metricUnit="m" metricValue="3.72" pageId="9" pageNumber="345" unit="mm" value="37.2">37.2 mm</quantity>
SL;
<collectingRegion box="[136,353,1826,1850]" country="Indonesia" name="Kalimantan Tengah" pageId="9" pageNumber="345">Kalimantan Tengah</collectingRegion>
:
<collectingCounty box="[365,463,1826,1850]" pageId="9" pageNumber="345">Katingan</collectingCounty>
basin,
<collectingMunicipality box="[544,657,1826,1850]" pageId="9" pageNumber="345">Mendawai</collectingMunicipality>
sub-basin; stream at km 57 logging road at buffer zone of
<location LSID="urn:lsid:plazi:treatment:0397F038FFF8FFB3FF04F953848CF7EF:8EE117F5FFF8FFB7FD68F8B380D1F897" county="Katingan" latitude="-0.75018334" longLatPrecision="1" longitude="112.286385" municipality="Mendawai" name="Bukit RayaBukit Baka National Park" pageId="9" pageNumber="345" stateProvince="Kalimantan Tengah">Bukit RayaBukit Baka National Park</location>
; at deep pool (ca.
<elevation box="[607,742,1890,1914]" metricMagnitude="0" metricUnit="m" metricValue="2.5" metricValueMax="3.0" metricValueMin="2.0" pageId="9" pageNumber="345" unit="m" value="2.5" valueMax="3.0" valueMin="2.0">
<quantity box="[607,675,1890,1914]" metricMagnitude="0" metricUnit="m" metricValue="2.5" metricValueMax="3.0" metricValueMin="2.0" pageId="9" pageNumber="345" unit="m" value="2.5" valueMax="3.0" valueMin="2.0">23 m</quantity>
depth
</elevation>
) at first cascade series, about
<quantity box="[412,466,1922,1946]" metricMagnitude="1" metricUnit="m" metricValue="1.5" pageId="9" pageNumber="345" unit="m" value="15.0">
<elevation box="[412,466,1922,1946]" metricMagnitude="1" metricUnit="m" metricValue="1.5" pageId="9" pageNumber="345" unit="m" value="15.0">15 m</elevation>
</quantity>
high, about
<quantity box="[597,664,1922,1946]" metricMagnitude="2" metricUnit="m" metricValue="8.0" pageId="9" pageNumber="345" unit="m" value="800.0">
<elevation box="[597,664,1922,1946]" metricMagnitude="2" metricUnit="m" metricValue="8.0" pageId="9" pageNumber="345" unit="m" value="800.0">800 m</elevation>
</quantity>
upstream,
<geoCoordinate box="[136,270,1953,1978]" degrees="00" direction="south" minutes="45.011" orientation="latitude" pageId="9" pageNumber="345" precision="1" value="-0.75018334">00°45.011S</geoCoordinate>
,
<geoCoordinate box="[282,431,1953,1978]" degrees="112" direction="east" minutes="17.183" orientation="longitude" pageId="9" pageNumber="345" precision="1" value="112.286385">112°17.183E</geoCoordinate>
,
<elevation box="[443,552,1954,1978]" metricMagnitude="2" metricUnit="m" metricValue="2.11" pageId="9" pageNumber="345" unit="m" value="211.0">
<quantity box="[443,511,1954,1978]" metricMagnitude="2" metricUnit="m" metricValue="2.11" pageId="9" pageNumber="345" unit="m" value="211.0">211 m</quantity>
asl
</elevation>
;
<collectorName box="[564,672,1955,1978]" pageId="9" pageNumber="345">H. H. Tan</collectorName>
et al.,
<date pageId="9" pageNumber="345" value="2007-08-11">
<collectingDate pageId="9" pageNumber="345" value="2007-08-11">11 August 2007</collectingDate>
</date>
.
</materialsCitation>
</paragraph>
<paragraph blockId="9.[136,775,2050,2106]" lastBlockId="9.[835,1474,1698,1851]" pageId="9" pageNumber="345">
<materialsCitation accessionNumber="MZB17234" box="[136,449,2050,2075]" collectionCode="MZB" pageId="9" pageNumber="345" specimenCount="1" typeStatus="paratype">
<typeStatus box="[136,244,2051,2075]" pageId="9" pageNumber="345">Paratypes</typeStatus>
:
<accessionNumber box="[255,382,2050,2074]" httpUri="http://www.ncbi.nlm.nih.gov/protein/MZB17234" pageId="9" pageNumber="345">
<collectionCode box="[255,314,2050,2074]" country="Indonesia" httpUri="http://grbio.org/cool/b9gz-izvg" name="Museum Zoologicum Bogoriense" pageId="9" pageNumber="345" type="Museum">MZB</collectionCode>
17234
</accessionNumber>
,
<specimenCount box="[394,449,2050,2074]" pageId="9" pageNumber="345" type="generic">1 ex.</specimenCount>
</materialsCitation>
,
<materialsCitation accessionNumber="ZRC 61397" collectionCode="ZRC" pageId="9" pageNumber="345" specimenCount="2" typeStatus="paratype">
<accessionNumber box="[461,589,2050,2074]" httpUri="http://www.ncbi.nlm.nih.gov/protein/ZRC61397" pageId="9" pageNumber="345">
<collectionCode box="[461,513,2050,2074]" country="Singapore" httpUri="http://grbio.org/cool/16z4-1tbx" name="Zoological Reference Collection, National University of Singapore" pageId="9" pageNumber="345">ZRC</collectionCode>
61397
</accessionNumber>
,
<specimenCount box="[601,656,2050,2074]" pageId="9" pageNumber="345" type="generic">2 ex.</specimenCount>
,
<quantity metricMagnitude="-2" metricUnit="m" metricValue="3.35" metricValueMax="3.59" metricValueMin="3.11" pageId="9" pageNumber="345" unit="mm" value="33.5" valueMax="35.9" valueMin="31.1">31.135.9 mm</quantity>
SL; same locality data as
<typeStatus box="[473,570,2082,2106]" pageId="9" pageNumber="345">holotype</typeStatus>
</materialsCitation>
. —
<materialsCitation accessionNumber="ZRC 61400" collectingDate="2007-08-12" collectingDateMax="2007-08-13" collectingDateMin="2007-08-12" collectionCode="ZRC" collectorName="H. H. Tan" county="Katingan" elevation="218" latitude="-0.79321665" location="Sungei Baha'e" longLatPrecision="1" longitude="112.320335" municipality="Mendawai" pageId="9" pageNumber="345" specimenCount="4" stateProvince="Kalimantan Tengah" typeStatus="paratype">
<accessionNumber box="[618,748,2082,2106]" httpUri="http://www.ncbi.nlm.nih.gov/protein/ZRC61400" pageId="9" pageNumber="345">
<collectionCode box="[618,670,2082,2106]" country="Singapore" httpUri="http://grbio.org/cool/16z4-1tbx" name="Zoological Reference Collection, National University of Singapore" pageId="9" pageNumber="345">ZRC</collectionCode>
61400
</accessionNumber>
,
<specimenCount box="[761,869,1699,2106]" pageId="9" pageNumber="345" type="generic">4 ex.</specimenCount>
, 36.0
<quantity box="[940,1033,1698,1722]" metricMagnitude="-2" metricUnit="m" metricValue="4.029999999999999" pageId="9" pageNumber="345" unit="mm" value="40.3">40.3 mm</quantity>
SL;
<collectingRegion box="[1084,1298,1698,1722]" country="Indonesia" name="Kalimantan Tengah" pageId="9" pageNumber="345">Kalimantan Tengah</collectingRegion>
:
<collectingCounty box="[1307,1405,1698,1722]" pageId="9" pageNumber="345">Katingan</collectingCounty>
basin,
<collectingMunicipality box="[835,948,1730,1754]" pageId="9" pageNumber="345">Mendawai</collectingMunicipality>
sub-basin;
<location LSID="urn:lsid:plazi:treatment:0397F038FFF8FFB3FF04F953848CF7EF:8EE117F5FFF8FFB7FBDBF9338597F937" box="[1078,1240,1730,1754]" county="Katingan" latitude="-0.79321665" longLatPrecision="1" longitude="112.320335" municipality="Mendawai" name="Sungei Baha'e" pageId="9" pageNumber="345" stateProvince="Kalimantan Tengah">Sungei Bahae</location>
, km 64 logging road at buffer zone of
<location LSID="urn:lsid:plazi:treatment:0397F038FFF8FFB3FF04F953848CF7EF:8EE117F5FFF8FFB7FBE3F91384F1F917" box="[1038,1470,1762,1786]" county="Katingan" latitude="-0.79321665" longLatPrecision="1" longitude="112.320335" municipality="Mendawai" name="Bukit Raya-Bukit Baka National Park" pageId="9" pageNumber="345" stateProvince="Kalimantan Tengah">Bukit Raya-Bukit Baka National Park</location>
,
<geoCoordinate box="[836,972,1793,1819]" degrees="00" direction="south" minutes="47.593" orientation="latitude" pageId="9" pageNumber="345" precision="1" value="-0.79321665">00°47.593S</geoCoordinate>
,
<geoCoordinate box="[987,1139,1793,1819]" degrees="112" direction="east" minutes="19.220" orientation="longitude" pageId="9" pageNumber="345" precision="1" value="112.320335">112°19.220E</geoCoordinate>
,
<elevation box="[1154,1269,1794,1819]" metricMagnitude="2" metricUnit="m" metricValue="2.18" pageId="9" pageNumber="345" unit="m" value="218.0">
<quantity box="[1154,1226,1795,1819]" metricMagnitude="2" metricUnit="m" metricValue="2.18" pageId="9" pageNumber="345" unit="m" value="218.0">218 m</quantity>
asl
</elevation>
;
<collectorName box="[1284,1400,1795,1818]" pageId="9" pageNumber="345">H. H. Tan</collectorName>
et al.,
<date box="[836,1054,1827,1851]" pageId="9" pageNumber="345" value="2007-08-12" valueMax="2007-08-13" valueMin="2007-08-12">
<collectingDate box="[836,1054,1827,1851]" pageId="9" pageNumber="345" value="2007-08-12" valueMax="2007-08-13" valueMin="2007-08-12">1213 August 2007</collectingDate>
</date>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection lastPageId="11" lastPageNumber="347" pageId="9" pageNumber="345" type="diagnosis">
<paragraph blockId="9.[835,1474,1890,2107]" lastBlockId="11.[136,776,1569,1785]" lastPageId="11" lastPageNumber="347" pageId="9" pageNumber="345">
<emphasis bold="true" box="[835,952,1890,1914]" pageId="9" pageNumber="345">Diagnosis.</emphasis>
<taxonomicName authorityName="Hui" authorityYear="2021" box="[959,1248,1890,1914]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="9" pageNumber="345" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[959,1248,1890,1914]" italics="true" pageId="9" pageNumber="345">Hypergastromyzon abditus</emphasis>
</taxonomicName>
can be distinguished from its congeners in having the unique combination of characters: large number of lateral scales (6274 [mean 71]); highest number of pectoral-fin rays (2628, mode 27, vs. 2425 for other two species); slender caudal-peduncle depth (5.87.4% [mean 6.6] SL); short caudal-peduncle length (4.37.4% [mean 5.9] SL); short dorsal-fin base length (10.614.4% [mean 12.2] SL); shortest pectoral-fin length (37.240.9% [mean 38.5] SL, vs. 40.342.5 [mean 41.2] in
<taxonomicName class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="humilis">
<emphasis italics="true" pageId="11" pageNumber="347">H. humilis</emphasis>
</taxonomicName>
, and 36.742.4 [mean 39.1] in
<taxonomicName box="[551,664,1633,1657]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="sambas">
<emphasis box="[551,664,1633,1657]" italics="true" pageId="11" pageNumber="347">H. sambas</emphasis>
</taxonomicName>
); smallest eye diameter (3.65.3% [mean 4.5] SL, vs. 4.85.9 [mean 5.4] in
<taxonomicName box="[218,332,1697,1721]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="humilis">
<emphasis box="[218,332,1697,1721]" italics="true" pageId="11" pageNumber="347">H. humilis</emphasis>
</taxonomicName>
, and 3.45.6 [mean 4.6] in
<taxonomicName box="[643,759,1697,1721]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="sambas">
<emphasis box="[643,759,1697,1721]" italics="true" pageId="11" pageNumber="347">H. sambas</emphasis>
</taxonomicName>
); lower lip with truncate anterior margin (vs. gently curved in
<taxonomicName box="[165,278,1761,1785]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="humilis">
<emphasis box="[165,278,1761,1785]" italics="true" pageId="11" pageNumber="347">H. humilis</emphasis>
</taxonomicName>
and bilobed with median cleft in
<taxonomicName box="[647,760,1761,1785]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="sambas">
<emphasis box="[647,760,1761,1785]" italics="true" pageId="11" pageNumber="347">H. sambas</emphasis>
</taxonomicName>
).
</paragraph>
</subSubSection>
<caption ID-DOI="http://doi.org/10.5281/zenodo.7174192" ID-Zenodo-Dep="7174192" box="[113,1349,1388,1410]" httpUri="https://zenodo.org/record/7174192/files/figure.png" pageId="10" pageNumber="346" startId="10.[113,148,1388,1410]" targetBox="[157,1408,189,1373]" targetPageId="10">
<paragraph blockId="10.[113,1349,1388,1410]" box="[113,1349,1388,1410]" pageId="10" pageNumber="346">
Fig. 7.
<taxonomicName authority=", MZB" authorityName="MZB" box="[185,512,1388,1409]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="10" pageNumber="346" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[185,446,1388,1409]" italics="true" pageId="10" pageNumber="346">Hypergastromyzon abditus</emphasis>
, MZB
</taxonomicName>
17233, 37.2 mm SL, holotype, male; composite of dorsal, lateral, and ventral views.
</paragraph>
</caption>
<caption ID-DOI="http://doi.org/10.5281/zenodo.7174196" ID-Zenodo-Dep="7174196" httpUri="https://zenodo.org/record/7174196/files/figure.png" pageId="10" pageNumber="346" startId="10.[113,148,2064,2086]" targetBox="[113,1451,1465,2049]" targetPageId="10">
<paragraph blockId="10.[113,1451,2064,2115]" pageId="10" pageNumber="346">
Fig. 8.
<taxonomicName authority=", ZRC" authorityName="ZRC" box="[185,508,2064,2086]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="10" pageNumber="346" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[185,447,2064,2086]" italics="true" pageId="10" pageNumber="346">Hypergastromyzon abditus</emphasis>
, ZRC
</taxonomicName>
61400, 40.3 mm SL, paratype, male; close-up of lateral view of anterior half of body showing tubercles on head, body, and pectoral fin.
</paragraph>
</caption>
<caption ID-DOI="http://doi.org/10.5281/zenodo.7174198" ID-Zenodo-Dep="7174198" httpUri="https://zenodo.org/record/7174198/files/figure.png" pageId="11" pageNumber="347" startId="11.[136,171,1463,1485]" targetBox="[137,1465,191,1445]" targetPageId="11">
<paragraph blockId="11.[136,1475,1463,1514]" pageId="11" pageNumber="347">
Fig. 9.
<taxonomicName authority=", ZRC" authorityName="ZRC" box="[209,533,1463,1485]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="11" pageNumber="347" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[209,471,1463,1485]" italics="true" pageId="11" pageNumber="347">Hypergastromyzon abditus</emphasis>
, ZRC
</taxonomicName>
61397, ca. 38 mm SL, female; freshly preserved colouration; composite of dorsal, lateral, and ventral views.
</paragraph>
</caption>
<subSubSection lastPageId="13" lastPageNumber="349" pageId="11" pageNumber="347" type="description">
<paragraph blockId="11.[136,775,1825,1881]" pageId="11" pageNumber="347">
<emphasis bold="true" box="[136,277,1825,1849]" pageId="11" pageNumber="347">Description.</emphasis>
See
<figureCitation box="[337,454,1825,1849]" captionStart-0="Fig" captionStart-1="Fig" captionStart-2="Fig" captionStart-3="Fig" captionStartId-0="10.[113,148,1388,1410]" captionStartId-1="10.[113,148,2064,2086]" captionStartId-2="11.[136,171,1463,1485]" captionStartId-3="12.[113,148,1412,1434]" captionTargetBox-0="[157,1408,189,1373]" captionTargetBox-1="[113,1451,1465,2049]" captionTargetBox-2="[137,1465,191,1445]" captionTargetBox-3="[113,1451,189,1397]" captionTargetId-0="figure-16@10.[157,1408,189,1373]" captionTargetId-1="figure-14@10.[113,1451,1465,2049]" captionTargetId-2="figure-8@11.[116,1494,169,1465]" captionTargetId-3="figure-13@12.[113,1451,189,1397]" captionTargetPageId-0="10" captionTargetPageId-1="10" captionTargetPageId-2="11" captionTargetPageId-3="12" captionText-0="Fig. 7. Hypergastromyzon abditus, MZB 17233, 37.2 mm SL, holotype, male; composite of dorsal, lateral, and ventral views." captionText-1="Fig. 8. Hypergastromyzon abditus, ZRC 61400, 40.3 mm SL, paratype, male; close-up of lateral view of anterior half of body showing tubercles on head, body, and pectoral fin." captionText-2="Fig. 9. Hypergastromyzon abditus, ZRC 61397, ca. 38 mm SL, female; freshly preserved colouration; composite of dorsal, lateral, and ventral views." captionText-3="Fig. 10. Hypergastromyzon abditus, ZRC 61397, 38.0 mm SL, female; composite of dorsal, lateral, and ventral views." figureDoi-0="http://doi.org/10.5281/zenodo.7174192" figureDoi-1="http://doi.org/10.5281/zenodo.7174196" figureDoi-2="http://doi.org/10.5281/zenodo.7174198" figureDoi-3="http://doi.org/10.5281/zenodo.7174200" httpUri-0="https://zenodo.org/record/7174192/files/figure.png" httpUri-1="https://zenodo.org/record/7174196/files/figure.png" httpUri-2="https://zenodo.org/record/7174198/files/figure.png" httpUri-3="https://zenodo.org/record/7174200/files/figure.png" pageId="11" pageNumber="347">Figs. 710</figureCitation>
for general appearance, and
<tableCitation box="[136,219,1857,1881]" captionStart="Table 1" captionStartId="4.[112,167,513,536]" captionText="Table 1. Meristics and morphometric data for Hypergastromyzon humilis; H. abditus, new species; H. sambas, new species; and Engkaria eubranchus. Data in brackets refer to (modal count), data in square parentheses refer to [mean ± standard deviation]; * refers to total fin-ray count, ** refers to principal fin-ray count only." pageId="11" pageNumber="347">Table 1</tableCitation>
for meristic and morphometric information.
</paragraph>
<paragraph blockId="11.[136,775,1921,2105]" lastBlockId="12.[112,753,1490,1706]" lastPageId="12" lastPageNumber="348" pageId="11" pageNumber="347">
Body depressed, widest and deepest at posterior margin of pectoral-fin base, narrowest at caudal peduncle. Lateral line distinct and complete, running along median of body to caudal-fin base. Head depressed, rounded in dorsal profile, inferior mouth. Mouth simple, lower lip in ventral view with truncate anterior profile, mouth width about ¼ of head width, two pairs of distinct but short rostral barbels, one pair of relatively longer maxillary barbels, margin of both upper and lower lips entire; shallow pocket on both sides of mouth, lower lip without tiny raised bumps, continuous to throat without discrete structures. Naris large, ca. ⅓ eye diameter, anterior to eye. Eye situated dorsally, middle of eye located above pectoral-fin origin, eye diameter less than opercle opening. Opercle opening lunate, located above pectoral-fin rays 67. Tubercles present and evenly distributed over head and anterior-dorsal part of body and extending to supra-pectoral region. Pectoral fins enlarged, forming a fan-like shape, total fin-ray count 2628, posterior edge just overlapping with pelvic-fin origin. Pelvic fins enlarged and completely fused at the posterior edge, forming a U-shape, total fin-ray count 1920 on each half. Belly naked. Anal pore situated nearer to pelvic-fin base than to anal-fin origin, just visible from ventral view. Both pectoral- and pelvic-fin anterior rays dorsal surface with tubercles, evenly distributed along fin ray, roughly half of ray length. Supra-pelvic flap present, bi-lobed, covering up to base of pelvic-fin ray 6. Anal fin small and triangular, adpressed extending past caudal-fin base. Caudal fin truncate. Dorsal fin small, triangular; origin posterior to pelvic-fin origin. Largest examined specimen
<quantity box="[113,210,1682,1706]" metricMagnitude="-2" metricUnit="m" metricValue="4.029999999999999" pageId="12" pageNumber="348" unit="mm" value="40.3">40.3 mm</quantity>
SL (
<accessionNumber box="[266,399,1682,1706]" httpUri="http://www.ncbi.nlm.nih.gov/protein/ZRC61400" pageId="12" pageNumber="348">ZRC 61400</accessionNumber>
).
</paragraph>
<caption ID-DOI="http://doi.org/10.5281/zenodo.7174200" ID-Zenodo-Dep="7174200" box="[113,1277,1412,1434]" httpUri="https://zenodo.org/record/7174200/files/figure.png" pageId="12" pageNumber="348" startId="12.[113,148,1412,1434]" targetBox="[113,1451,189,1397]" targetPageId="12">
<paragraph blockId="12.[113,1277,1412,1434]" box="[113,1277,1412,1434]" pageId="12" pageNumber="348">
Fig. 10.
<taxonomicName authority=", ZRC" authorityName="ZRC" box="[197,519,1412,1434]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="12" pageNumber="348" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[197,458,1412,1434]" italics="true" pageId="12" pageNumber="348">Hypergastromyzon abditus</emphasis>
, ZRC
</taxonomicName>
61397, 38.0 mm SL, female; composite of dorsal, lateral, and ventral views.
</paragraph>
</caption>
<paragraph blockId="12.[113,626,1746,1770]" box="[113,626,1746,1770]" pageId="12" pageNumber="348">Total vertebral count: 3132 (mode 31, n = 8).</paragraph>
<paragraph blockId="12.[113,754,1809,2058]" lastBlockId="12.[813,1453,1490,1802]" pageId="12" pageNumber="348">
<emphasis bold="true" box="[113,345,1809,1833]" pageId="12" pageNumber="348">Colouration in life.</emphasis>
See
<figureCitation box="[406,477,1810,1834]" captionStart="Fig" captionStartId="11.[136,171,1463,1485]" captionTargetBox="[137,1465,191,1445]" captionTargetId="figure-8@11.[116,1494,169,1465]" captionTargetPageId="11" captionText="Fig. 9. Hypergastromyzon abditus, ZRC 61397, ca. 38 mm SL, female; freshly preserved colouration; composite of dorsal, lateral, and ventral views." figureDoi="http://doi.org/10.5281/zenodo.7174198" httpUri="https://zenodo.org/record/7174198/files/figure.png" pageId="12" pageNumber="348">Fig. 9</figureCitation>
. Head light brown with many dark brown blotches. Pupil of eye with gold ring. Opercle with iridescent gold. Dorsum of body light brown or yellowish-brown, with many scattered darker brown bars and blotches. Dorsum with up to eight dark brown saddlelike bars edged with black, extending to mid-body, maybe extended downwards but not to venter. Middle of body with clear patternless border dorsal and ventral to lateral line, lateral line black. Venter cream. Dorsal fin with one faint black bar, interradial membrane hyaline. Caudal-fin base black, one distinct thick black bar, at median of fin, border clear, interradial membranes hyaline. Anal fin with one black bar, interradial membrane hyaline. Both pectoral and pelvic fins anterior ⅔ dark brown with yellowish-brown margin. Pectoral-fin base light brown with irregular dark brown blotches. Supra-pelvic flap with three black blotches, first at anterior portion, second at middle and third at posterior margin.
</paragraph>
<paragraph blockId="12.[813,1451,1841,1930]" pageId="12" pageNumber="348">
<emphasis bold="true" box="[813,1130,1841,1865]" pageId="12" pageNumber="348">Colouration in preservative.</emphasis>
See
<figureCitation box="[1178,1251,1842,1866]" captionStart="Fig" captionStartId="10.[113,148,1388,1410]" captionTargetBox="[157,1408,189,1373]" captionTargetId="figure-16@10.[157,1408,189,1373]" captionTargetPageId="10" captionText="Fig. 7. Hypergastromyzon abditus, MZB 17233, 37.2 mm SL, holotype, male; composite of dorsal, lateral, and ventral views." figureDoi="http://doi.org/10.5281/zenodo.7174192" httpUri="https://zenodo.org/record/7174192/files/figure.png" pageId="12" pageNumber="348">Figs. 7</figureCitation>
,
<figureCitation box="[1261,1276,1842,1866]" captionStart="Fig" captionStartId="10.[113,148,2064,2086]" captionTargetBox="[113,1451,1465,2049]" captionTargetId="figure-14@10.[113,1451,1465,2049]" captionTargetPageId="10" captionText="Fig. 8. Hypergastromyzon abditus, ZRC 61400, 40.3 mm SL, paratype, male; close-up of lateral view of anterior half of body showing tubercles on head, body, and pectoral fin." figureDoi="http://doi.org/10.5281/zenodo.7174196" httpUri="https://zenodo.org/record/7174196/files/figure.png" pageId="12" pageNumber="348">8</figureCitation>
,
<figureCitation box="[1286,1315,1842,1866]" captionStart="Fig" captionStartId="12.[113,148,1412,1434]" captionTargetBox="[113,1451,189,1397]" captionTargetId="figure-13@12.[113,1451,189,1397]" captionTargetPageId="12" captionText="Fig. 10. Hypergastromyzon abditus, ZRC 61397, 38.0 mm SL, female; composite of dorsal, lateral, and ventral views." figureDoi="http://doi.org/10.5281/zenodo.7174200" httpUri="https://zenodo.org/record/7174200/files/figure.png" pageId="12" pageNumber="348">10</figureCitation>
. Colouration as above, except bright colours are absent. Lateral line dark brown.
</paragraph>
<paragraph blockId="12.[813,1453,1969,2058]" lastBlockId="13.[136,775,1675,1763]" lastPageId="13" lastPageNumber="349" pageId="12" pageNumber="348">
<emphasis bold="true" box="[813,1042,1969,1994]" pageId="12" pageNumber="348">Sexual characters.</emphasis>
Genital papillae indistinguishable between sexes. Males with enlarged tubercles on pectoral- and pelvic-fin rays, tubercles along whole fin ray, largest tubercles nearest to body, decreasing in size towards fin margin. Large male (
<accessionNumber box="[352,478,1707,1731]" httpUri="http://www.ncbi.nlm.nih.gov/protein/ZRC61400" pageId="13" pageNumber="349">ZRC 61400</accessionNumber>
,
<quantity box="[487,579,1707,1731]" metricMagnitude="-2" metricUnit="m" metricValue="4.029999999999999" pageId="13" pageNumber="349" unit="mm" value="40.3">40.3 mm</quantity>
SL) with tubercles on venter of caudal peduncle.
</paragraph>
</subSubSection>
<caption ID-DOI="http://doi.org/10.5281/zenodo.7174202" ID-Zenodo-Dep="7174202" box="[136,1475,1598,1620]" httpUri="https://zenodo.org/record/7174202/files/figure.png" pageId="13" pageNumber="349" startId="13.[136,171,1598,1620]" targetBox="[136,1474,189,1582]" targetPageId="13">
<paragraph blockId="13.[136,1475,1598,1620]" box="[136,1475,1598,1620]" pageId="13" pageNumber="349">
Fig. 11.
<taxonomicName authority=", ZRC" authorityName="ZRC" box="[217,537,1598,1619]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="sambas">
<emphasis box="[217,478,1598,1619]" italics="true" pageId="13" pageNumber="349">Hypergastromyzon sambas</emphasis>
, ZRC
</taxonomicName>
61381, ca. 30 mm SL, male (?); live colouration; composite of dorsal, lateral, and ventral views.
</paragraph>
</caption>
<subSubSection pageId="13" pageNumber="349" type="distribution">
<paragraph blockId="13.[136,776,1803,1955]" lastBlockId="13.[835,1475,1674,1922]" pageId="13" pageNumber="349">
<emphasis bold="true" box="[136,299,1803,1827]" pageId="13" pageNumber="349">Distribution.</emphasis>
<taxonomicName box="[312,637,1803,1827]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[312,637,1803,1827]" italics="true" pageId="13" pageNumber="349">Hypergastromyzon abditus</emphasis>
</taxonomicName>
appears to be endemic to the upper Katingan basin, which drains southeasterly from the Schwaner Range (
<figureCitation box="[570,634,1867,1891]" captionStart="Fig" captionStartId="9.[136,171,1592,1614]" captionTargetBox="[136,1474,189,1577]" captionTargetId="figure-7@9.[136,1474,189,1577]" captionTargetPageId="9" captionText="Fig. 6. Map of Borneo showing distribution of H. humilis (black circle), H. sambas (black square), H. abditus (white circle), and E. eubranchus (black pentagon). Each symbol may represent more than one location." figureDoi="http://doi.org/10.5281/zenodo.7174190" httpUri="https://zenodo.org/record/7174190/files/figure.png" pageId="13" pageNumber="349">Fig. 6</figureCitation>
). The current known distribution of
<taxonomicName box="[377,490,1899,1923]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[377,490,1899,1923]" italics="true" pageId="13" pageNumber="349">H. abditus</emphasis>
</taxonomicName>
is directly adjacent to that of
<taxonomicName box="[165,276,1931,1955]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="humilis">
<emphasis box="[165,276,1931,1955]" italics="true" pageId="13" pageNumber="349">H. humilis</emphasis>
</taxonomicName>
, which is northwards in the Melawi sub-basin.
<emphasis bold="true" box="[835,968,1674,1699]" pageId="13" pageNumber="349">Field notes.</emphasis>
See
<bibRefCitation author="Tan HH" box="[1025,1146,1675,1699]" pageId="13" pageNumber="349" pagination="48 - 64" refId="ref12938" refString="Tan HH (2009) A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa, 2171: 48 - 64." type="journal article" year="2009">Tan (2009)</bibRefCitation>
for a list of syntopic species. From the locality of the
<typeStatus box="[1102,1148,1707,1731]" pageId="13" pageNumber="349">type</typeStatus>
series above a small cascade, only the following syntopic fish species were observed:
<taxonomicName box="[836,968,1770,1794]" class="Actinopterygii" family="Cyprinidae" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="family">Cyprinidae</taxonomicName>
<taxonomicName authorityName="Inger &amp; Chin" authorityYear="1962" box="[1000,1306,1770,1794]" class="Actinopterygii" family="Cyprinidae" genus="Paracrossochilus" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="acerus">
<emphasis box="[1000,1306,1770,1794]" italics="true" pageId="13" pageNumber="349">Paracrossochilus acerus</emphasis>
</taxonomicName>
and
<taxonomicName box="[1375,1466,1771,1794]" class="Actinopterygii" family="Cyprinidae" genus="Tor" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="undetermined">
<emphasis box="[1375,1417,1771,1794]" italics="true" pageId="13" pageNumber="349">Tor</emphasis>
sp.
</taxonomicName>
; and
<taxonomicName authorityName="Fowler" authorityYear="1905" box="[889,1103,1802,1826]" class="Actinopterygii" family="Gastromyzontidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="family">Gastromyzontidae</taxonomicName>
<taxonomicName authorityName="Tan" authorityYear="2006" box="[1134,1466,1802,1826]" class="Actinopterygii" family="Balitoridae" genus="Gastromyzon" isUncertain="true" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="psiloetron">
<emphasis box="[1134,1290,1803,1826]" italics="true" pageId="13" pageNumber="349">Gastromyzon</emphasis>
cf.
<emphasis box="[1346,1466,1802,1826]" italics="true" pageId="13" pageNumber="349">psiloetron</emphasis>
</taxonomicName>
. Downstream of the cascade, the following fish species were observed:
<taxonomicName box="[1001,1119,1866,1890]" class="Actinopterygii" family="Cyprinidae" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="family">Cyprinidae</taxonomicName>
<taxonomicName authorityName="Herre" authorityYear="1933" box="[1146,1316,1866,1890]" class="Actinopterygii" family="Cyprinidae" genus="Barbodes" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="sealei">
<emphasis box="[1146,1316,1866,1890]" italics="true" pageId="13" pageNumber="349">Barbodes sealei</emphasis>
</taxonomicName>
;
<taxonomicName authorityName="Swainson" authorityYear="1839" box="[1329,1447,1866,1890]" class="Actinopterygii" family="Balitoridae" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="family">Balitoridae</taxonomicName>
<taxonomicName baseAuthorityName="Tan" baseAuthorityYear="2009" box="[835,1107,1898,1922]" class="Actinopterygii" family="Balitoridae" genus="Pseudohomaloptera" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="batek">
<emphasis box="[835,1107,1898,1922]" italics="true" pageId="13" pageNumber="349">Pseudohomaloptera batek</emphasis>
</taxonomicName>
; and
<taxonomicName box="[1162,1273,1898,1922]" class="Actinopterygii" family="Channidae" kingdom="Animalia" order="Perciformes" pageId="13" pageNumber="349" phylum="Chordata" rank="family">Channidae</taxonomicName>
<taxonomicName baseAuthorityName="Cuvier" baseAuthorityYear="1831" box="[1300,1468,1898,1922]" class="Actinopterygii" family="Channidae" genus="Channa" kingdom="Animalia" order="Perciformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="limbata">
<emphasis box="[1300,1468,1898,1922]" italics="true" pageId="13" pageNumber="349">Channa limbata</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection pageId="13" pageNumber="349" type="etymology">
<paragraph blockId="13.[835,1475,1962,2050]" pageId="13" pageNumber="349">
<emphasis bold="true" box="[835,973,1963,1987]" pageId="13" pageNumber="349">Etymology.</emphasis>
From the Latin
<taxonomicName box="[1177,1261,1962,1986]" class="Actinopterygii" family="Balitoridae" genus="Hypergastromyzon" kingdom="Animalia" order="Cypriniformes" pageId="13" pageNumber="349" phylum="Chordata" rank="species" species="abditus">
<emphasis box="[1177,1261,1962,1986]" italics="true" pageId="13" pageNumber="349">abditus</emphasis>
</taxonomicName>
, meaning hidden, concealed. This is in reference to its cryptic colouration and ability to blend into its environs. Used as a noun in apposition.
</paragraph>
</subSubSection>
</treatment>
</document>