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<document id="F8C96F128827E621005CB5B7374C20AC" ID-CLB-Dataset="307849" ID-DOI="10.11646/zootaxa.5570.3.4" ID-GBIF-Dataset="5adb9640-c3fd-4f24-997a-e09d10916dbb" ID-ISSN="1175-5326" ID-Zenodo-Dep="14745384" ID-ZooBank="B9E2CDCE-2371-4A55-ADAA-E38584122BB9" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="diego" IM.materialsCitations_approvedBy="diego" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="diego" checkinTime="1737968491944" checkinUser="plazi" docAuthor="Vasanth, M., Kubendran, T., Subramanian, K. A., J. - L &amp; Suttinun, C." docDate="2025" docId="7F0987A8FFB9441F6587FB19FAAB4FCD" docLanguage="en" docName="zootaxa.5570.3.4.pdf" docOrigin="Zootaxa 5570 (3)" docSource="https://doi.org/10.11646/zootaxa.5570.3.4" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Platybaetis arunachalensis Vasanth, Kubendran, Subramanian &amp; Gattolliat 2025, sp. nov." docType="treatment" docVersion="5" lastPageNumber="518" masterDocId="8330FFD0FFB844186510FFEBFFDB484C" masterDocTitle="Contribution to the genus Platybaetis Müller-Liebenau, 1980 (Ephemeroptera: Baetidae) in India" masterLastPageNumber="532" masterPageNumber="511" pageNumber="512" updateTime="1738152283882" updateUser="diego" zenodo-license-document="CLOSED">
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<mods:title id="FA0E9433FE0860E496368DCB3476A72F">Contribution to the genus Platybaetis Müller-Liebenau, 1980 (Ephemeroptera: Baetidae) in India</mods:title>
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<mods:namePart id="EAD8485CC2A77DE91987716B01F3D8F0">Vasanth, M.</mods:namePart>
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<mods:namePart id="91AE53EEC87D41246F478A7197FD36FA">Kubendran, T.</mods:namePart>
<mods:affiliation id="9758F06E820CFF6E3E56907BCECC120A">Miscellaneous Insect Order Section, Zoological Survey of India, Prani Vigyan Bhawan, M-Block, New Alipore, Kolkata- 700 053 West Bengal, India.</mods:affiliation>
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<mods:affiliation id="E6BAF7F9E26BC0AC250B03FC8CFAB75E">Zoological Survey of India, Southern Regional Centre, Santhome High Road, Chennai- 600 028, Tamil Nadu, India.</mods:affiliation>
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<mods:namePart id="F43EF1840AB546E5B9B45D67A99673BA">J. - L</mods:namePart>
<mods:affiliation id="C04A81469BDFA1C1DD758DC359ADBE94">Department of Zoology, Naturéum-State Museum of Natural Science, Palais de Rumine, Place Riponne 6, CH- 1005 Lausanne, Switzerland. &amp; Department of Ecology and Evolution, University of Lausanne (UNIL), CH- 1015 Lausanne Switzerland</mods:affiliation>
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<treatment id="7F0987A8FFB9441F6587FB19FAAB4FCD" ID-DOI="http://doi.org/10.5281/zenodo.14745380" ID-GBIF-Taxon="252967236" ID-Zenodo-Dep="14745380" LSID="urn:lsid:plazi:treatment:7F0987A8FFB9441F6587FB19FAAB4FCD" httpUri="http://treatment.plazi.org/id/7F0987A8FFB9441F6587FB19FAAB4FCD" lastPageId="7" lastPageNumber="518" pageId="1" pageNumber="512" scope_family="Baetidae" scope_order="Ephemeroptera">
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<taxonomicName id="30A04D3DFFB944196587FB19FB994D40" authority="Vasanth, Kubendran, Subramanian &amp; Gattolliat" authorityName="Vasanth, Kubendran, Subramanian &amp; Gattolliat" authorityYear="2025" box="[151,1090,1266,1293]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="1" pageNumber="512" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFB944196587FB19FE064D41" bold="true" box="[151,477,1266,1293]" italics="true" pageId="1" pageNumber="512">Platybaetis arunachalensis</emphasis>
Vasanth, Kubendran, Subramanian &amp; Gattolliat
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<taxonomicNameLabel id="DEE757D7FFB944196156FB18FB7F4D41" box="[1094,1188,1267,1293]" pageId="1" pageNumber="512" rank="species">sp. nov.</taxonomicNameLabel>
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<paragraph id="F71F36BEFFB944196587FAFCFEAF4D7D" blockId="1.[151,1188,1266,1329]" box="[151,372,1302,1329]" pageId="1" pageNumber="512">
(
<figureCitation id="6F9B2A3BFFB94419658FFAFCFEDF4D7D" box="[159,260,1303,1329]" captionStart-0="FIGURE 1" captionStart-1="FIGURE 2" captionStart-2="FIGURE 3" captionStart-3="FIGURE 4" captionStart-4="FIGURE 5" captionStart-5="FIGURE 6" captionStart-6="FIGURE 7" captionStartId-0="2.[151,250,2017,2041]" captionStartId-1="3.[151,250,1544,1568]" captionStartId-2="4.[151,250,1943,1967]" captionStartId-3="5.[151,250,1442,1466]" captionStartId-4="6.[151,250,1621,1645]" captionStartId-5="7.[151,250,1464,1488]" captionStartId-6="8.[151,250,1786,1810]" captionTargetBox-0="[151,1435,450,1990]" captionTargetBox-1="[152,1435,181,1520]" captionTargetBox-2="[179,1407,181,1919]" captionTargetBox-3="[151,1435,181,1418]" captionTargetBox-4="[151,1435,181,1598]" captionTargetBox-5="[183,1435,181,1440]" captionTargetBox-6="[151,1435,181,1762]" captionTargetId-0="figure-169@2.[151,1435,450,1990]" captionTargetId-1="figure-18@3.[152,1435,181,1520]" captionTargetId-2="figure-26@4.[179,1407,181,1919]" captionTargetId-3="figure-18@5.[151,1435,181,1418]" captionTargetId-4="figure-26@6.[151,1435,181,1598]" captionTargetId-5="figure-18@7.[151,1435,181,1440]" captionTargetId-6="figure-26@8.[151,1435,181,1762]" captionTargetPageId-0="2" captionTargetPageId-1="3" captionTargetPageId-2="4" captionTargetPageId-3="5" captionTargetPageId-4="6" captionTargetPageId-5="7" captionTargetPageId-6="8" captionText-0="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." captionText-1="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." captionText-2="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." captionText-3="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." captionText-4="FIGURE 5. Platybaetis arunachalensis sp. nov. A. Fore femur; B. Mid femur; C. Hind femur." captionText-5="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." captionText-6="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi-0="http://doi.org/10.5281/zenodo.14745386" figureDoi-1="http://doi.org/10.5281/zenodo.14745388" figureDoi-2="http://doi.org/10.5281/zenodo.14745390" figureDoi-3="http://doi.org/10.5281/zenodo.14745392" figureDoi-4="http://doi.org/10.5281/zenodo.14745394" figureDoi-5="http://doi.org/10.5281/zenodo.14745396" figureDoi-6="http://doi.org/10.5281/zenodo.14745400" httpUri-0="https://zenodo.org/record/14745386/files/figure.png" httpUri-1="https://zenodo.org/record/14745388/files/figure.png" httpUri-2="https://zenodo.org/record/14745390/files/figure.png" httpUri-3="https://zenodo.org/record/14745392/files/figure.png" httpUri-4="https://zenodo.org/record/14745394/files/figure.png" httpUri-5="https://zenodo.org/record/14745396/files/figure.png" httpUri-6="https://zenodo.org/record/14745400/files/figure.png" pageId="1" pageNumber="512">Figs 17</figureCitation>
,
<figureCitation id="6F9B2A3BFFB944196400FAFDFE994D7D" box="[272,322,1302,1329]" captionStart="FIGURE 15" captionStartId="17.[152,255,1486,1510]" captionTargetBox="[170,1416,181,1462]" captionTargetId="figure-18@17.[170,1416,181,1462]" captionTargetPageId="17" captionText="FIGURE 15. A. Type (collection) locality of Platybaetis arunachalensis sp. nov. (Siang Rriver); B. Collection locality of Platybaetis uenoi (Teipuki River)." figureDoi="http://doi.org/10.5281/zenodo.14745416" httpUri="https://zenodo.org/record/14745416/files/figure.png" pageId="1" pageNumber="512">15A</figureCitation>
,
<figureCitation id="6F9B2A3BFFB94419645EFAFCFEB04D7D" box="[334,363,1303,1329]" captionStart="FIGURE 16" captionStartId="18.[152,255,1078,1102]" captionTargetBox="[176,1410,181,1054]" captionTargetId="figure-26@18.[176,1410,181,1054]" captionTargetPageId="18" captionText="FIGURE 16. Map. Distribution map of the genus Platybaetis in India." figureDoi="http://doi.org/10.5281/zenodo.14745420" httpUri="https://zenodo.org/record/14745420/files/figure.png" pageId="1" pageNumber="512">16</figureCitation>
)
</paragraph>
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<emphasis id="C5D4EAACFFB944196587FAB6FE594D3B" bold="true" box="[151,386,1373,1399]" pageId="1" pageNumber="512">Material examined.</emphasis>
<materialsCitation id="47C83CE3FFB944196499FAB6FEC34DF2" collectingDate="2024-02-24" collectionCode="I" collectorName="T. Kubendran" country="India" county="Upper Siang district" elevation="333" latitude="28.65781" location="Yingkiong Town" longLatPrecision="4" longitude="95.0186" municipality="Yingkiong" pageId="1" pageNumber="512" specimenCode="I/E/842" specimenCount="1" specimenCount-larva="1" stateProvince="Arunachal Pradesh" typeStatus="holotype">
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:
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mature
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,
<collectingCountry id="8FB7762EFFB9441967A1FAB6FD364D3B" box="[689,749,1373,1399]" name="India" pageId="1" pageNumber="512">India</collectingCountry>
,
<collectingRegion id="3564F85CFFB9441967E7FAB6FC0B4D3B" box="[759,976,1373,1399]" country="India" name="Arunachal Pradesh" pageId="1" pageNumber="512">Arunachal Pradesh</collectingRegion>
,
<collectingCounty id="1E7E4E32FFB9441966CCFAB5FB194D3B" box="[988,1218,1373,1400]" pageId="1" pageNumber="512">Upper Siang district</collectingCounty>
,
<collectingMunicipality id="177BACC4FFB9441961DDFAB6FA984D3B" box="[1229,1347,1373,1399]" pageId="1" pageNumber="512">Yingkiong</collectingMunicipality>
(
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away from
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towards north),
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,
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,
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;
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<collectingDate id="935AE996FFB944196114FA6BFBA04DD6" box="[1028,1147,1408,1434]" pageId="1" pageNumber="512" value="2024-02-24">24.II.2024</collectingDate>
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, coll.
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, Reg. no.
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I/E/
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842
<materialsCitation id="47C83CE3FFB944196433FA4FFC294DF2" box="[291,1010,1443,1470]" collectingDate="2024-02-24" collectionCode="I" collectorName="T. Kubendran" country="India" county="Upper Siang district" elevation="333" latitude="28.65781" location="Yingkiong Town" longLatPrecision="4" longitude="95.0186" municipality="Yingkiong" pageId="1" pageNumber="512" specimenCode="I/E/843" specimenCount="8" specimenCount-larva="8" stateProvince="Arunachal Pradesh" typeStatus="paratype">
<emphasis id="C5D4EAACFFB944196433FA4FFE444DF2" bold="true" box="[291,415,1444,1470]" pageId="1" pageNumber="512">
<typeStatus id="281B881CFFB944196433FA4FFE444DF2" box="[291,415,1444,1470]" pageId="1" pageNumber="512">Paratypes</typeStatus>
</emphasis>
:
<specimenCount id="E1A6FD37FFB9441964BEFA4FFDD54DF1" box="[430,526,1443,1470]" count="8" pageId="1" pageNumber="512" type="larva">8 larvae</specimenCount>
, same data as holotype, Reg. no.
<specimenCode id="A7069EC5FFB94419668BFA4FFC294DF2" box="[923,1010,1444,1470]" pageId="1" pageNumber="512">I/E/843</specimenCode>
</materialsCitation>
</specimenCount>
</specimenCode>
</materialsCitation>
.
<emphasis id="C5D4EAACFFB944196110FA48FAAD4DF1" bold="true" box="[1024,1398,1443,1469]" pageId="1" pageNumber="512">Additional material examined:</emphasis>
<materialsCitation id="47C83CE3FFB944196090FA4FFC624E48" ID-GBIF-Occurrence="5052217303" collectingDate="2024-02-26" collectionCode="T" collectorName="T. Kubendran" country="India" county="Upper Siang district" elevation="439" latitude="28.52581" location="Komku Village near Bridge" longLatPrecision="4" longitude="95.0483" municipality="Yingkiong" pageId="1" pageNumber="512" specimenCount="10" specimenCount-larva="10" stateProvince="Arunachal Pradesh">
<specimenCount id="E1A6FD37FFB944196090FA4FFF004DAD" count="10" pageId="1" pageNumber="512" type="larva">10 larvae</specimenCount>
(2 mature larvae on slide),
<collectingCountry id="8FB7762EFFB944196706FA2CFD894DAD" box="[534,594,1479,1505]" name="India" pageId="1" pageNumber="512">India</collectingCountry>
,
<collectingRegion id="3564F85CFFB94419674DFA2CFCED4DAD" box="[605,822,1479,1505]" country="India" name="Arunachal Pradesh" pageId="1" pageNumber="512">Arunachal Pradesh</collectingRegion>
,
<collectingCounty id="1E7E4E32FFB944196651FA2CFBF34DAD" box="[833,1064,1479,1505]" pageId="1" pageNumber="512">Upper Siang district</collectingCounty>
,
<collectingMunicipality id="177BACC4FFB944196123FA2CFB774DAD" box="[1075,1196,1479,1505]" pageId="1" pageNumber="512">Yingkiong</collectingMunicipality>
,
<location id="F27F6065FFB9441961A8FA2CFF3D4E48" LSID="urn:lsid:plazi:treatment:7F0987A8FFB9441F6587FB19FAAB4FCD:F27F6065FFB9441961A8FA2CFF3D4E48" country="India" county="Upper Siang district" latitude="28.52581" longLatPrecision="4" longitude="95.0483" municipality="Yingkiong" name="Komku Village near Bridge" pageId="1" pageNumber="512" stateProvince="Arunachal Pradesh">Komku Village near Bridge</location>
,
<geoCoordinate id="92945079FFB9441965E1FA01FEA64E49" box="[241,381,1514,1541]" degrees="28.52581" direction="north" orientation="latitude" pageId="1" pageNumber="512" precision="1" value="28.52581">28.52581°N</geoCoordinate>
,
<geoCoordinate id="92945079FFB944196498FA01FDD94E49" box="[392,514,1514,1541]" degrees="95.0483" direction="east" orientation="longitude" pageId="1" pageNumber="512" precision="5" value="95.0483">95.0483°E</geoCoordinate>
,
<quantity id="30589B5BFFB94419671DFA01FD8D4E48" box="[525,598,1514,1540]" metricMagnitude="2" metricUnit="m" metricValue="4.39" pageId="1" pageNumber="512" unit="m" value="439.0">
<elevation id="7C8DD18DFFB94419671DFA01FD8D4E48" box="[525,598,1514,1540]" metricMagnitude="2" metricUnit="m" metricValue="4.39" pageId="1" pageNumber="512" unit="m" value="439.0">439 m</elevation>
</quantity>
,
<date id="831E107EFFB944196772FA01FD024E48" box="[610,729,1514,1540]" pageId="1" pageNumber="512" value="2024-02-26">
<collectingDate id="935AE996FFB944196772FA01FD024E48" box="[610,729,1514,1540]" pageId="1" pageNumber="512" value="2024-02-26">26.II.2024</collectingDate>
</date>
, coll.
<collectorName id="5A555368FFB94419660CFA01FC624E48" box="[796,953,1514,1540]" pageId="1" pageNumber="512">T. Kubendran</collectorName>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="BFBA6535FFB9441D65D7F9E6FE414F26" lastPageId="5" lastPageNumber="516" pageId="1" pageNumber="512" type="description">
<paragraph id="F71F36BEFFB9441965D7F9E6FA514E06" blockId="1.[151,1437,1373,2034]" pageId="1" pageNumber="512">
<emphasis id="C5D4EAACFFB9441965D7F9E6FE934E6B" bold="true" box="[199,328,1549,1575]" pageId="1" pageNumber="512">Description.</emphasis>
<emphasis id="C5D4EAACFFB944196440F9E5FE564E6B" box="[336,397,1550,1575]" italics="true" pageId="1" pageNumber="512">Larva</emphasis>
(
<figureCitation id="6F9B2A3BFFB94419648BF9E6FDD64E6B" box="[411,525,1549,1575]" captionStart="FIGURE 1" captionStartId="2.[151,250,2017,2041]" captionTargetBox="[151,1435,450,1990]" captionTargetId="figure-169@2.[151,1435,450,1990]" captionTargetPageId="2" captionText="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." figureDoi="http://doi.org/10.5281/zenodo.14745386" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="1" pageNumber="512">Figs 1AC</figureCitation>
,
<figureCitation id="6F9B2A3BFFB944196709F9E6FDE74E6B" box="[537,572,1549,1575]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="1" pageNumber="512">2A</figureCitation>
): male: body length 6.57.0 mm, cerci 4.0
<quantity id="30589B5BFFB9441966EAF9E6FB904E64" box="[1018,1099,1549,1576]" metricMagnitude="-3" metricUnit="m" metricValue="4.5" pageId="1" pageNumber="512" unit="mm" value="4.5">4.5 mm</quantity>
, antennae
<quantity id="30589B5BFFB9441961A7F9E6FAE94E64" box="[1207,1330,1549,1576]" metricMagnitude="-3" metricUnit="m" metricValue="1.25" metricValueMax="1.3" metricValueMin="1.2" pageId="1" pageNumber="512" unit="mm" value="1.25" valueMax="1.3" valueMin="1.2">1.21.3 mm</quantity>
(
<figureCitation id="6F9B2A3BFFB944196051F9E6FA4B4E6B" box="[1345,1424,1549,1575]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="1" pageNumber="512">Fig. 4E</figureCitation>
); female: body length 8.59.0 mm, cerci 5.56.0 mm, antennae
<quantity id="30589B5BFFB9441967EDF9DBFCAC4E07" box="[765,887,1584,1611]" metricMagnitude="-3" metricUnit="m" metricValue="1.35" metricValueMax="1.4" metricValueMin="1.3" pageId="1" pageNumber="512" unit="mm" value="1.35" valueMax="1.4" valueMin="1.3">1.31.4 mm</quantity>
; median caudal filament three segments (
<figureCitation id="6F9B2A3BFFB94419601FF9DBFAA64E06" box="[1295,1405,1584,1611]" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="1" pageNumber="512">Figs 7B, C</figureCitation>
).
</paragraph>
<paragraph id="F71F36BEFFB9441A65D7F9B8FBA749E1" blockId="1.[151,1437,1373,2034]" lastBlockId="2.[151,1437,151,429]" lastPageId="2" lastPageNumber="513" pageId="1" pageNumber="512">
<emphasis id="C5D4EAACFFB9441965D7F9B8FED54E22" bold="true" box="[199,270,1619,1646]" pageId="1" pageNumber="512">
<emphasis id="C5D4EAACFFB9441965D7F9B8FEDE4E22" bold="true" box="[199,261,1619,1646]" italics="true" pageId="1" pageNumber="512">Head</emphasis>
:
</emphasis>
Flattened, slightly wider than long; brownish yellow with diffusive black irregular markings, sometimes poorly visible; frons and vertex with brown markings; male turbinate eye reddish (
<figureCitation id="6F9B2A3BFFB944196135F99CFB794EDD" box="[1061,1186,1655,1681]" captionStart="FIGURE 1" captionStartId="2.[151,250,2017,2041]" captionTargetBox="[151,1435,450,1990]" captionTargetId="figure-169@2.[151,1435,450,1990]" captionTargetPageId="2" captionText="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." figureDoi="http://doi.org/10.5281/zenodo.14745386" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="1" pageNumber="512">Figs 1AC</figureCitation>
,
<figureCitation id="6F9B2A3BFFB9441961BDF99CFB084EDD" box="[1197,1235,1655,1681]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="1" pageNumber="512">2A</figureCitation>
). Antennae brown with pale, scape thick and small setae on anterior margin with base broader, pedicel cylindrical, and flagellum brown with pale, slightly shorter than head width, small hair-like setae on each segment (
<figureCitation id="6F9B2A3BFFB944196183F956FB2A4E9B" box="[1171,1265,1725,1751]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Figs 3A</figureCitation>
,
<figureCitation id="6F9B2A3BFFB9441961EFF956FAF84E9B" box="[1279,1315,1725,1751]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="1" pageNumber="512">4E</figureCitation>
). Posterior margin of head without incision (
<figureCitation id="6F9B2A3BFFB944196716F90BFDB94EB6" box="[518,610,1760,1786]" captionStart="FIGURE 1" captionStartId="2.[151,250,2017,2041]" captionTargetBox="[151,1435,450,1990]" captionTargetId="figure-169@2.[151,1435,450,1990]" captionTargetPageId="2" captionText="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." figureDoi="http://doi.org/10.5281/zenodo.14745386" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="1" pageNumber="512">Figs 1A</figureCitation>
,
<figureCitation id="6F9B2A3BFFB94419677DF90BFD484EB6" box="[621,659,1760,1786]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="1" pageNumber="512">2A</figureCitation>
). Labrum (
<figureCitation id="6F9B2A3BFFB94419661CF90BFC5E4EB6" box="[780,901,1760,1786]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Figs 3B, C</figureCitation>
) anterior margin rounded, 2.0× wider than long; distal margin with row of apically hair-like setae and feathered setae, dorsal surface with hair-like and numerous stout setae; arc of 1+3 stout medium setae. Distal margin with medial emargination without any crenation (
<figureCitation id="6F9B2A3BFFB944196028F8CCFA544F0D" box="[1336,1423,1831,1857]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Fig. 3C</figureCitation>
). Mandibles: incisors fused with blunt denticles (
<figureCitation id="6F9B2A3BFFB9441967A3F8A1FCE84F28" box="[691,819,1866,1892]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Figs 3EG</figureCitation>
); right mandible (
<figureCitation id="6F9B2A3BFFB9441966EEF8A1FB8F4F28" box="[1022,1108,1866,1892]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Fig. 3E</figureCitation>
) incisors with 67 denticles, prostheca stick-like poorly developed, tuft of setae at apex of mola reduced, dorsal margin smooth. Left mandible (
<figureCitation id="6F9B2A3BFFB94419658FF87BFEC54FE6" box="[159,286,1936,1962]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Figs 3F, G</figureCitation>
) incisors with 78 denticles; prostheca comb-shaped; mola with thumb-like long apical extension. Basal half with few short simple setae scattered over dorsal surface. Hypopharynx (
<figureCitation id="6F9B2A3BFFB944196155F858FB464F82" box="[1093,1181,1971,1998]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="1" pageNumber="512">Fig. 3D</figureCitation>
) with small, thin setae and well-developed lingua and superlingua. Maxillae (
<figureCitation id="6F9B2A3BFFB944196610F83CFC834FBE" box="[768,856,2007,2034]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="1" pageNumber="512">Fig. 4D</figureCitation>
) with three dentisetae and 3 canines; setae of inner dorsal row 1.2× longer than setae of inner ventral row; palps 2-segmented; segment II longer than segment I with inner margin deeply curved and outer margin slightly curved; segment II with small rounded projection at apex surrounding by a few simple setae. Labium (
<figureCitation id="6F9B2A3BFFBA441A6796FF34FCD948B5" box="[646,770,223,249]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="2" pageNumber="513">Figs 4AC</figureCitation>
) with glossae slightly longer than paraglossae; glossae with blunt stout setae at apex (
<figureCitation id="6F9B2A3BFFBA441A64BDFEE8FDF04951" box="[429,555,259,285]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="2" pageNumber="513">Figs 4BC</figureCitation>
); a few small stout setae on dorsal margin; 78 long, stout setae on inner margin and a long, stout seta in middle; paraglossae broad with 3 rows of long, stout setae apically; dorsal surface with long, stout setae; palps 3-segmented, segment I narrow with several micropores on dorsal surface (
<figureCitation id="6F9B2A3BFFBA441A61A4FEA0FAD44929" box="[1204,1295,331,357]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="2" pageNumber="513">Fig. 4A</figureCitation>
); segment II small, outer margin with short, fine, simple setae; dorsally with several micropores; ventrally with three medium, simple setae. Segment III slightly rounded with several short, stout acute setae (
<figureCitation id="6F9B2A3BFFBA441A6104FE78FBB449E1" box="[1044,1135,403,429]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="2" pageNumber="513">Fig. 4A</figureCitation>
).
</paragraph>
<caption id="A3DF6636FFBA441A6587F80AFAC64FB5" ID-DOI="http://doi.org/10.5281/zenodo.14745386" ID-Zenodo-Dep="14745386" box="[151,1309,2017,2041]" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="2" pageNumber="513" startId="2.[151,250,2017,2041]" targetBox="[151,1435,450,1990]" targetPageId="2" targetType="figure">
<paragraph id="F71F36BEFFBA441A6587F80AFAC64FB5" blockId="2.[151,1309,2017,2041]" box="[151,1309,2017,2041]" pageId="2" pageNumber="513">
<emphasis id="C5D4EAACFFBA441A6587F80AFEC84FB5" bold="true" box="[151,275,2017,2041]" pageId="2" pageNumber="513">FIGURE 1.</emphasis>
<taxonomicName id="30A04D3DFFBA441A6409F80AFDF64FB5" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[281,557,2017,2041]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="2" pageNumber="513" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBA441A6409F80AFDF64FB5" box="[281,557,2017,2041]" italics="true" pageId="2" pageNumber="513">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBA441A6723F80AFD514FB5" bold="true" box="[563,650,2017,2041]" pageId="2" pageNumber="513">
<taxonomicNameLabel id="DEE757D7FFBA441A6723F80AFD5D4FB5" box="[563,646,2017,2041]" pageId="2" pageNumber="513" rank="species">sp. nov.</taxonomicNameLabel>
,
</emphasis>
mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view.
</paragraph>
</caption>
<caption id="A3DF6636FFBB441B6587F9E3FAEC4E6C" ID-DOI="http://doi.org/10.5281/zenodo.14745388" ID-Zenodo-Dep="14745388" box="[151,1335,1544,1569]" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="3" pageNumber="514" startId="3.[151,250,1544,1568]" targetBox="[152,1435,181,1520]" targetPageId="3" targetType="figure">
<paragraph id="F71F36BEFFBB441B6587F9E3FAEC4E6C" blockId="3.[151,1335,1544,1569]" box="[151,1335,1544,1569]" pageId="3" pageNumber="514">
<emphasis id="C5D4EAACFFBB441B6587F9E3FEC84E6C" bold="true" box="[151,275,1544,1568]" pageId="3" pageNumber="514">FIGURE 2.</emphasis>
<taxonomicName id="30A04D3DFFBB441B6409F9E3FDF64E6C" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[281,557,1544,1568]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="3" pageNumber="514" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBB441B6409F9E3FDF64E6C" box="[281,557,1544,1568]" italics="true" pageId="3" pageNumber="514">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBB441B6723F9E2FD584E6D" bold="true" box="[563,643,1545,1569]" pageId="3" pageNumber="514">
<taxonomicNameLabel id="DEE757D7FFBB441B6723F9E2FD584E6D" box="[563,643,1545,1569]" pageId="3" pageNumber="514" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view.
</paragraph>
</caption>
<paragraph id="F71F36BEFFBB441B65D7F999FB614F9D" blockId="3.[151,1437,1650,2001]" pageId="3" pageNumber="514">
<emphasis id="C5D4EAACFFBB441B65D7F999FEFD4EC1" bold="true" box="[199,294,1650,1677]" pageId="3" pageNumber="514">
<emphasis id="C5D4EAACFFBB441B65D7F999FEC64EC1" bold="true" box="[199,285,1650,1677]" italics="true" pageId="3" pageNumber="514">Thorax</emphasis>
:
</emphasis>
Yellowish brown (
<figureCitation id="6F9B2A3BFFBB441B6710F998FDA44EC1" box="[512,639,1651,1677]" captionStart="FIGURE 1" captionStartId="2.[151,250,2017,2041]" captionTargetBox="[151,1435,450,1990]" captionTargetId="figure-169@2.[151,1435,450,1990]" captionTargetPageId="2" captionText="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." figureDoi="http://doi.org/10.5281/zenodo.14745386" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="3" pageNumber="514">Figs 1AC</figureCitation>
,
<figureCitation id="6F9B2A3BFFBB441B679DF998FD0F4EC1" box="[653,724,1651,1677]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="3" pageNumber="514">2AC</figureCitation>
). Pronotum nearly as broad as head capsule (
<figureCitation id="6F9B2A3BFFBB441B61CBF998FA804EC1" box="[1243,1371,1651,1677]" captionStart="FIGURE 1" captionStartId="2.[151,250,2017,2041]" captionTargetBox="[151,1435,450,1990]" captionTargetId="figure-169@2.[151,1435,450,1990]" captionTargetPageId="2" captionText="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." figureDoi="http://doi.org/10.5281/zenodo.14745386" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="3" pageNumber="514">Figs 1AC</figureCitation>
,
<figureCitation id="6F9B2A3BFFBB441B6079F998FA544EC1" box="[1385,1423,1651,1677]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="3" pageNumber="514">2A</figureCitation>
); pronotum posterolateral margin rounded. Ventral side of pronotum and mesonotum with medial suture (
<figureCitation id="6F9B2A3BFFBB441B6025F97CFA544EFD" box="[1333,1423,1687,1713]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="3" pageNumber="514">Fig. 2B</figureCitation>
). Hindwing pads absent. Legs generally brownish yellow with a pale-yellow pattern (
<figureCitation id="6F9B2A3BFFBB441B614CF950FB074E99" box="[1116,1244,1722,1749]" captionStart="FIGURE 5" captionStartId="6.[151,250,1621,1645]" captionTargetBox="[151,1435,181,1598]" captionTargetId="figure-26@6.[151,1435,181,1598]" captionTargetPageId="6" captionText="FIGURE 5. Platybaetis arunachalensis sp. nov. A. Fore femur; B. Mid femur; C. Hind femur." figureDoi="http://doi.org/10.5281/zenodo.14745394" httpUri="https://zenodo.org/record/14745394/files/figure.png" pageId="3" pageNumber="514">Figs 5AC</figureCitation>
,
<figureCitation id="6F9B2A3BFFBB441B61FAF950FAEA4E99" box="[1258,1329,1723,1749]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">6AC</figureCitation>
). Foreleg (
<figureCitation id="6F9B2A3BFFBB441B658FF934FF274EB5" box="[159,252,1758,1785]" captionStart="FIGURE 5" captionStartId="6.[151,250,1621,1645]" captionTargetBox="[151,1435,181,1598]" captionTargetId="figure-26@6.[151,1435,181,1598]" captionTargetPageId="6" captionText="FIGURE 5. Platybaetis arunachalensis sp. nov. A. Fore femur; B. Mid femur; C. Hind femur." figureDoi="http://doi.org/10.5281/zenodo.14745394" httpUri="https://zenodo.org/record/14745394/files/figure.png" pageId="3" pageNumber="514">Figs 5A</figureCitation>
,
<figureCitation id="6F9B2A3BFFBB441B6417F934FEF54EB5" box="[263,302,1759,1785]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">6A</figureCitation>
): femur apex slightly rounded, dorsal surface with small, stout for scattered setae, outer margin with a row of long feathered and ciliate setae (
<figureCitation id="6F9B2A3BFFBB441B675DF8E8FD7C4F51" box="[589,679,1795,1821]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">Fig. 6D</figureCitation>
), inner margin with small, stout for scattered setae roughly arranged in two rows (
<figureCitation id="6F9B2A3BFFBB441B6420F8CCFE574F0D" box="[304,396,1831,1857]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="3" pageNumber="514">Fig. 4A</figureCitation>
); femur and tibia of similar length, dorsal margin with row of long, hair like setae and few short stout setae (
<figureCitation id="6F9B2A3BFFBB441B644BF8A0FE6F4F29" box="[347,436,1866,1893]" captionStart="FIGURE 5" captionStartId="6.[151,250,1621,1645]" captionTargetBox="[151,1435,181,1598]" captionTargetId="figure-26@6.[151,1435,181,1598]" captionTargetPageId="6" captionText="FIGURE 5. Platybaetis arunachalensis sp. nov. A. Fore femur; B. Mid femur; C. Hind femur." figureDoi="http://doi.org/10.5281/zenodo.14745394" httpUri="https://zenodo.org/record/14745394/files/figure.png" pageId="3" pageNumber="514">Fig. 5A</figureCitation>
), patella tibial suture present along with long hair-like setae (
<figureCitation id="6F9B2A3BFFBB441B6171F8A0FB634F29" box="[1121,1208,1867,1893]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">Fig. 6E</figureCitation>
); tarsus 2.3× shorter than tibia, with dorsal row of simple setae, inner margin with a row of short, stout setae ending with fine, long seta near apex (
<figureCitation id="6F9B2A3BFFBB441B6404F878FEB54FE1" box="[276,366,1939,1965]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">Fig. 6A</figureCitation>
), claw with single row of six denticles increasing in size towards apex, with few apical stripes, subapical setae absent (
<figureCitation id="6F9B2A3BFFBB441B648EF85CFE284F9D" box="[414,499,1975,2001]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">Fig. 6F</figureCitation>
). Middle and hind legs same as forelegs (
<figureCitation id="6F9B2A3BFFBB441B66D3F85CFBC54F9D" box="[963,1054,1974,2001]" captionStart="FIGURE 5" captionStartId="6.[151,250,1621,1645]" captionTargetBox="[151,1435,181,1598]" captionTargetId="figure-26@6.[151,1435,181,1598]" captionTargetPageId="6" captionText="FIGURE 5. Platybaetis arunachalensis sp. nov. A. Fore femur; B. Mid femur; C. Hind femur." figureDoi="http://doi.org/10.5281/zenodo.14745394" httpUri="https://zenodo.org/record/14745394/files/figure.png" pageId="3" pageNumber="514">Figs 5B</figureCitation>
,
<figureCitation id="6F9B2A3BFFBB441B613BF85CFB954F9D" box="[1067,1102,1975,2001]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">6B</figureCitation>
;
<figureCitation id="6F9B2A3BFFBB441B614AF85DFBA64F9D" box="[1114,1149,1974,2001]" captionStart="FIGURE 5" captionStartId="6.[151,250,1621,1645]" captionTargetBox="[151,1435,181,1598]" captionTargetId="figure-26@6.[151,1435,181,1598]" captionTargetPageId="6" captionText="FIGURE 5. Platybaetis arunachalensis sp. nov. A. Fore femur; B. Mid femur; C. Hind femur." figureDoi="http://doi.org/10.5281/zenodo.14745394" httpUri="https://zenodo.org/record/14745394/files/figure.png" pageId="3" pageNumber="514">5C</figureCitation>
,
<figureCitation id="6F9B2A3BFFBB441B6199F85CFB764F9D" box="[1161,1197,1975,2001]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="3" pageNumber="514">6C</figureCitation>
).
</paragraph>
<caption id="A3DF6636FFBC441C6587F87CFE754FB4" ID-DOI="http://doi.org/10.5281/zenodo.14745390" ID-Zenodo-Dep="14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="4" pageNumber="515" startId="4.[151,250,1943,1967]" targetBox="[179,1407,181,1919]" targetPageId="4" targetType="figure">
<paragraph id="F71F36BEFFBC441C6587F87CFE754FB4" blockId="4.[151,1436,1943,2040]" pageId="4" pageNumber="515">
<emphasis id="C5D4EAACFFBC441C6587F87CFEC84FE3" bold="true" box="[151,275,1943,1967]" pageId="4" pageNumber="515">FIGURE 3.</emphasis>
Mouthparts of
<taxonomicName id="30A04D3DFFBC441C64A1F873FD1F4FFC" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[433,708,1944,1968]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="4" pageNumber="515" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBC441C64A1F873FD1F4FFC" box="[433,708,1944,1968]" italics="true" pageId="4" pageNumber="515">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBC441C67DBF873FCC74FFC" bold="true" box="[715,796,1944,1968]" pageId="4" pageNumber="515">
<taxonomicNameLabel id="DEE757D7FFBC441C67DBF873FCC74FFC" box="[715,796,1944,1968]" pageId="4" pageNumber="515" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae).
</paragraph>
</caption>
<caption id="A3DF6636FFBD441D6587FA49FE0E4D92" ID-DOI="http://doi.org/10.5281/zenodo.14745392" ID-Zenodo-Dep="14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="5" pageNumber="516" startId="5.[151,250,1442,1466]" targetBox="[151,1435,181,1418]" targetPageId="5" targetType="figure">
<paragraph id="F71F36BEFFBD441D6587FA49FE0E4D92" blockId="5.[151,1436,1442,1502]" pageId="5" pageNumber="516">
<emphasis id="C5D4EAACFFBD441D6587FA49FECF4DF6" bold="true" box="[151,276,1442,1466]" pageId="5" pageNumber="516">FIGURE 4.</emphasis>
<taxonomicName id="30A04D3DFFBD441D640CFA49FDEA4DF6" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[284,561,1442,1466]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="5" pageNumber="516" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBD441D640CFA49FDEA4DF6" box="[284,561,1442,1466]" italics="true" pageId="5" pageNumber="516">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBD441D6729FA49FD504DF6" bold="true" box="[569,651,1442,1466]" pageId="5" pageNumber="516">
<taxonomicNameLabel id="DEE757D7FFBD441D6729FA49FD504DF6" box="[569,651,1442,1466]" pageId="5" pageNumber="516" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae.
</paragraph>
</caption>
<paragraph id="F71F36BEFFBD441D65D7F9DBFAEB4F0A" blockId="5.[151,1437,1584,1971]" pageId="5" pageNumber="516">
<emphasis id="C5D4EAACFFBD441D65D7F9DBFEE44E06" bold="true" box="[199,319,1584,1611]" pageId="5" pageNumber="516">
<emphasis id="C5D4EAACFFBD441D65D7F9DBFEEE4E07" bold="true" box="[199,309,1584,1611]" italics="true" pageId="5" pageNumber="516">Abdomen</emphasis>
:
</emphasis>
Coloration of terga generally brown with yellowish brown pattern (
<figureCitation id="6F9B2A3BFFBD441D6148F9DBFB024E06" box="[1112,1241,1584,1610]" captionStart="FIGURE 1" captionStartId="2.[151,250,2017,2041]" captionTargetBox="[151,1435,450,1990]" captionTargetId="figure-169@2.[151,1435,450,1990]" captionTargetPageId="2" captionText="FIGURE 1. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view; B. Ventral view; C. Lateral view." figureDoi="http://doi.org/10.5281/zenodo.14745386" httpUri="https://zenodo.org/record/14745386/files/figure.png" pageId="5" pageNumber="516">Figs 1AC</figureCitation>
,
<figureCitation id="6F9B2A3BFFBD441D61F8F9DBFAD54E06" box="[1256,1294,1584,1610]" captionStart="FIGURE 2" captionStartId="3.[151,250,1544,1568]" captionTargetBox="[152,1435,181,1520]" captionTargetId="figure-18@3.[152,1435,181,1520]" captionTargetPageId="3" captionText="FIGURE 2. Platybaetis arunachalensis sp. nov., mature larvae. A. Dorsal view (female); BC. Thorax, dorsal view." figureDoi="http://doi.org/10.5281/zenodo.14745388" httpUri="https://zenodo.org/record/14745388/files/figure.png" pageId="5" pageNumber="516">2A</figureCitation>
); terga IIV brown with yellow pattern, medially with cross line marking and along with a pair of black spots; tergum V pale yellow with brown marks laterally; VIVII brown, VIII pale yellow with medially a pair of black spots, IXX brown. Posterior margin of abdominal terga IX with blunt denticles (
<figureCitation id="6F9B2A3BFFBD441D66B2F977FC274EFA" box="[930,1020,1692,1718]" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="5" pageNumber="516">Fig. 7A</figureCitation>
). Sterna IX ecru mixed with yellow. Gills present on segments IVII, simple, leaf-like, and rather broad; tracheae black on gills IVII, margin without minute setae (
<figureCitation id="6F9B2A3BFFBD441D6425F90FFE744EB2" box="[309,431,1764,1790]" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="5" pageNumber="516">Figs 7DJ</figureCitation>
). Paraproct distally slightly expanded and without marginal spines, surface covered with small rounded scale bases, fine simple setae, and small micropores (
<figureCitation id="6F9B2A3BFFBD441D6697F8E3FC3B4F6E" box="[903,992,1800,1826]" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="5" pageNumber="516">Fig. 7K</figureCitation>
). Posterolateral extension (cercotractor) with small spines. Cerci shorter than body length; paracercus composed of only 3 segments (
<figureCitation id="6F9B2A3BFFBD441D61B5F8C7FAFF4F0A" box="[1189,1316,1836,1862]" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="5" pageNumber="516">Figs 7BC</figureCitation>
).
</paragraph>
<paragraph id="F71F36BEFFBD441D65D7F8BBFE414F26" blockId="5.[151,1437,1584,1971]" box="[199,410,1872,1898]" pageId="5" pageNumber="516">
<emphasis id="C5D4EAACFFBD441D65D7F8BBFEC64F26" bold="true" box="[199,285,1872,1898]" pageId="5" pageNumber="516">Imago:</emphasis>
Unknown.
</paragraph>
</subSubSection>
<subSubSection id="BFBA6535FFBD441D65D7F89FFCC34FC3" box="[199,792,1908,1935]" pageId="5" pageNumber="516" type="distribution">
<paragraph id="F71F36BEFFBD441D65D7F89FFCC34FC3" blockId="5.[151,1437,1584,1971]" box="[199,792,1908,1935]" pageId="5" pageNumber="516">
<emphasis id="C5D4EAACFFBD441D65D7F89FFEB84FC2" bold="true" box="[199,355,1908,1934]" pageId="5" pageNumber="516">Distribution:</emphasis>
<collectingRegion id="3564F85CFFBD441D6478F89FFDE64FC2" box="[360,573,1908,1934]" country="India" name="Arunachal Pradesh" pageId="5" pageNumber="516">Arunachal Pradesh</collectingRegion>
(
<collectingCountry id="8FB7762EFFBD441D675BF89FFD534FC2" box="[587,648,1908,1934]" name="India" pageId="5" pageNumber="516">India</collectingCountry>
) (
<figureCitation id="6F9B2A3BFFBD441D678EF89FFCD74FC3" box="[670,780,1908,1935]" captionStart="FIGURE 15" captionStartId="17.[152,255,1486,1510]" captionTargetBox="[170,1416,181,1462]" captionTargetId="figure-18@17.[170,1416,181,1462]" captionTargetPageId="17" captionText="FIGURE 15. A. Type (collection) locality of Platybaetis arunachalensis sp. nov. (Siang Rriver); B. Collection locality of Platybaetis uenoi (Teipuki River)." figureDoi="http://doi.org/10.5281/zenodo.14745416" httpUri="https://zenodo.org/record/14745416/files/figure.png" pageId="5" pageNumber="516">Figs 15A</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="BFBA6535FFBD441D65D7F873FC3E4FFE" box="[199,997,1944,1971]" pageId="5" pageNumber="516" type="etymology">
<paragraph id="F71F36BEFFBD441D65D7F873FC3E4FFE" blockId="5.[151,1437,1584,1971]" box="[199,997,1944,1971]" pageId="5" pageNumber="516">
<emphasis id="C5D4EAACFFBD441D65D7F873FE894FFE" bold="true" box="[199,338,1944,1970]" pageId="5" pageNumber="516">Etymology:</emphasis>
The species is named after the state of
<collectingRegion id="3564F85CFFBD441D6619F873FC3B4FFE" box="[777,992,1944,1970]" country="India" name="Arunachal Pradesh" pageId="5" pageNumber="516">Arunachal Pradesh</collectingRegion>
.
</paragraph>
</subSubSection>
<caption id="A3DF6636FFBE441E6587F9BEFB8C4E22" ID-DOI="http://doi.org/10.5281/zenodo.14745394" ID-Zenodo-Dep="14745394" box="[151,1111,1621,1646]" httpUri="https://zenodo.org/record/14745394/files/figure.png" pageId="6" pageNumber="517" startId="6.[151,250,1621,1645]" targetBox="[151,1435,181,1598]" targetPageId="6" targetType="figure">
<paragraph id="F71F36BEFFBE441E6587F9BEFB8C4E22" blockId="6.[151,1111,1621,1646]" box="[151,1111,1621,1646]" pageId="6" pageNumber="517">
<emphasis id="C5D4EAACFFBE441E6587F9BEFEC84E22" bold="true" box="[151,275,1621,1646]" pageId="6" pageNumber="517">FIGURE 5.</emphasis>
<taxonomicName id="30A04D3DFFBE441E6409F9BDFDF64E22" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[281,557,1622,1646]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="6" pageNumber="517" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBE441E6409F9BDFDF64E22" box="[281,557,1622,1646]" italics="true" pageId="6" pageNumber="517">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBE441E6723F9BDFD584E22" bold="true" box="[563,643,1622,1646]" pageId="6" pageNumber="517">
<taxonomicNameLabel id="DEE757D7FFBE441E6723F9BDFD584E22" box="[563,643,1622,1646]" pageId="6" pageNumber="517" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
A. Fore femur; B. Mid femur; C. Hind femur.
</paragraph>
</caption>
<subSubSection id="BFBA6535FFBE441E65D7F92BFF324FFE" pageId="6" pageNumber="517" type="diagnosis">
<paragraph id="F71F36BEFFBE441E65D7F92BFF324FFE" blockId="6.[151,1437,1728,1970]" pageId="6" pageNumber="517">
<emphasis id="C5D4EAACFFBE441E65D7F92BFE9F4E96" bold="true" box="[199,324,1728,1754]" pageId="6" pageNumber="517">Diagnosis:</emphasis>
<taxonomicName id="30A04D3DFFBE441E645AF92BFDA14E96" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[330,634,1728,1754]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="6" pageNumber="517" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBE441E645AF92BFDA14E96" box="[330,634,1728,1754]" italics="true" pageId="6" pageNumber="517">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBE441E6791F92BFD014E96" bold="true" box="[641,730,1728,1754]" pageId="6" pageNumber="517">
<taxonomicNameLabel id="DEE757D7FFBE441E6791F92BFD014E96" box="[641,730,1728,1754]" pageId="6" pageNumber="517" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
is rather similar to
<taxonomicName id="30A04D3DFFBE441E66A2F92AFB934E96" authorityName="Suttinun, Gattolliat &amp; Boonsoong" authorityYear="2018" box="[946,1096,1728,1754]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="6" pageNumber="517" phylum="Arthropoda" rank="species" species="nayokensis">
<emphasis id="C5D4EAACFFBE441E66A2F92AFB934E96" box="[946,1096,1728,1754]" italics="true" pageId="6" pageNumber="517">P. nayokensis</emphasis>
</taxonomicName>
; it can be distinguished by the following combination of characters: (i) labrum with arc of 3 medium setae and medial emargination without any crenation (
<figureCitation id="6F9B2A3BFFBE441E6400F8E3FE4B4F6E" box="[272,400,1800,1826]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="6" pageNumber="517">Figs 3BC</figureCitation>
); (ii) incisors of mandibles fused with blunt denticles (
<figureCitation id="6F9B2A3BFFBE441E6114F8E3FB5F4F6E" box="[1028,1156,1800,1826]" captionStart="FIGURE 3" captionStartId="4.[151,250,1943,1967]" captionTargetBox="[179,1407,181,1919]" captionTargetId="figure-26@4.[179,1407,181,1919]" captionTargetPageId="4" captionText="FIGURE 3. Mouthparts of Platybaetis arunachalensis sp. nov. A. Mouthparts closer view; B. Labrum (arrow: without medial crenation); C. Labrum closer view (dorsal); D. Hypopharynx; E. Right mandible; F. Left mandible; G. Left mandible close view (Arrow basal half of setae)." figureDoi="http://doi.org/10.5281/zenodo.14745390" httpUri="https://zenodo.org/record/14745390/files/figure.png" pageId="6" pageNumber="517">Figs 3EG</figureCitation>
); (iii) glossae with blunt stout setae at apex (
<figureCitation id="6F9B2A3BFFBE441E6466F8C7FE2D4F0A" box="[374,502,1836,1862]" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="6" pageNumber="517">Figs 4BC</figureCitation>
); (iv) labial palp segment I narrow with several micropores on dorsal surface (
<figureCitation id="6F9B2A3BFFBE441E607FF8C7FF664F26" captionStart="FIGURE 4" captionStartId="5.[151,250,1442,1466]" captionTargetBox="[151,1435,181,1418]" captionTargetId="figure-18@5.[151,1435,181,1418]" captionTargetPageId="5" captionText="FIGURE 4. Platybaetis arunachalensis sp. nov. A. Labium; B. Glossae and paraglossae closer view; C. Glossae blunt stout setae; D. Maxilla; E. Antennae." figureDoi="http://doi.org/10.5281/zenodo.14745392" httpUri="https://zenodo.org/record/14745392/files/figure.png" pageId="6" pageNumber="517">Fig. 4A</figureCitation>
); (v) hindwing pads absent; (vi) claw with 6 denticles, apical denticle larger than others (
<figureCitation id="6F9B2A3BFFBE441E6189F8BBFB354F26" box="[1177,1262,1872,1898]" captionStart="FIGURE 6" captionStartId="7.[151,250,1464,1488]" captionTargetBox="[183,1435,181,1440]" captionTargetId="figure-18@7.[151,1435,181,1440]" captionTargetPageId="7" captionText="FIGURE 6. Platybaetis arunachalensis sp. nov. AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw." figureDoi="http://doi.org/10.5281/zenodo.14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="6" pageNumber="517">Fig. 6F</figureCitation>
); (vii) posterior margin of abdominal terga IX with blunt denticles (
<figureCitation id="6F9B2A3BFFBE441E6610F89FFC854FC2" box="[768,862,1908,1934]" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="6" pageNumber="517">Fig. 7A</figureCitation>
); (viii) paracercus composed of 3 segments (
<figureCitation id="6F9B2A3BFFBE441E607AF89FFF064FFE" captionStart="FIGURE 7" captionStartId="8.[151,250,1786,1810]" captionTargetBox="[151,1435,181,1762]" captionTargetId="figure-26@8.[151,1435,181,1762]" captionTargetPageId="8" captionText="FIGURE 7. Platybaetis arunachalensis sp. nov. A. Posterior margin of tergum V; B. Paracercus; C. Paracercus closer view; D. Gill I; E. Gill II; F. Gill III; G. Gill IV; H. Gill V; I. Gill VI; J. Gill VII; K. Paraproct." figureDoi="http://doi.org/10.5281/zenodo.14745400" httpUri="https://zenodo.org/record/14745400/files/figure.png" pageId="6" pageNumber="517">Figs 7BC</figureCitation>
).
</paragraph>
</subSubSection>
<caption id="A3DF6636FFBF441F6587FA53FE7B4DB8" ID-DOI="http://doi.org/10.5281/zenodo.14745396" ID-Zenodo-Dep="14745396" httpUri="https://zenodo.org/record/14745396/files/figure.png" pageId="7" pageNumber="518" startId="7.[151,250,1464,1488]" targetBox="[183,1435,181,1440]" targetPageId="7" targetType="figure">
<paragraph id="F71F36BEFFBF441F6587FA53FE7B4DB8" blockId="7.[151,1436,1464,1524]" pageId="7" pageNumber="518">
<emphasis id="C5D4EAACFFBF441F6587FA53FECF4D9C" bold="true" box="[151,276,1464,1488]" pageId="7" pageNumber="518">FIGURE 6.</emphasis>
<taxonomicName id="30A04D3DFFBF441F640CFA53FDEA4D9C" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[284,561,1464,1488]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBF441F640CFA53FDEA4D9C" box="[284,561,1464,1488]" italics="true" pageId="7" pageNumber="518">Platybaetis arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBF441F6729FA53FD504D9C" bold="true" box="[569,651,1464,1488]" pageId="7" pageNumber="518">
<taxonomicNameLabel id="DEE757D7FFBF441F6729FA53FD504D9C" box="[569,651,1464,1488]" pageId="7" pageNumber="518" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
AC. Tarsus and tibia of fore-, mid-, and hind leg; D. Celiate setae; E. Mid tibia closer view; F. Claw.
</paragraph>
</caption>
<subSubSection id="BFBA6535FFBF441F65D7F9ADFAAB4FCD" pageId="7" pageNumber="518" type="biology_ecology">
<paragraph id="F71F36BEFFBF441F65D7F9ADFAAB4FCD" blockId="7.[151,1437,1606,1921]" pageId="7" pageNumber="518">
<emphasis id="C5D4EAACFFBF441F65D7F9ADFEF44E2C" bold="true" box="[199,303,1606,1632]" pageId="7" pageNumber="518">Ecology:</emphasis>
Larvae of
<taxonomicName id="30A04D3DFFBF441F64BFF9ACFDAC4E2C" authorityName="Vasanth &amp; Kubendran &amp; Subramanian &amp; J.-L &amp; Suttinun" authorityYear="2025" box="[431,631,1606,1632]" class="Insecta" family="Baetidae" genus="Platybaetis" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="species" species="arunachalensis" status="sp. nov.">
<emphasis id="C5D4EAACFFBF441F64BFF9ACFDAC4E2C" box="[431,631,1606,1632]" italics="true" pageId="7" pageNumber="518">P. arunachalensis</emphasis>
</taxonomicName>
<emphasis id="C5D4EAACFFBF441F6790F9ADFD004E2C" bold="true" box="[640,731,1606,1632]" pageId="7" pageNumber="518">
<taxonomicNameLabel id="DEE757D7FFBF441F6790F9ADFD004E2C" box="[640,731,1606,1632]" pageId="7" pageNumber="518" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
was collected from tributaries of the Brahmaputra River near Yingkiong in the Upper Siang district of
<collectingRegion id="3564F85CFFBF441F675FF981FCFA4EC8" box="[591,801,1642,1668]" country="India" name="Arunachal Pradesh" pageId="7" pageNumber="518">Arunachal Pradesh</collectingRegion>
(
<figureCitation id="6F9B2A3BFFBF441F663EF981FC4F4EC9" box="[814,916,1642,1669]" captionStart="FIGURE 15" captionStartId="17.[152,255,1486,1510]" captionTargetBox="[170,1416,181,1462]" captionTargetId="figure-18@17.[170,1416,181,1462]" captionTargetPageId="17" captionText="FIGURE 15. A. Type (collection) locality of Platybaetis arunachalensis sp. nov. (Siang Rriver); B. Collection locality of Platybaetis uenoi (Teipuki River)." figureDoi="http://doi.org/10.5281/zenodo.14745416" httpUri="https://zenodo.org/record/14745416/files/figure.png" pageId="7" pageNumber="518">Fig. 15A</figureCitation>
). These waterbodies are situated approximately
<quantity id="30589B5BFFBF441F6587F965FF054EE4" box="[151,222,1678,1704]" metricMagnitude="4" metricUnit="m" metricValue="2.0" pageId="7" pageNumber="518" unit="km" value="20.0">20 km</quantity>
north of Yingkiong town. The water flow near the bridge was notably strong. This new species was found in association with other
<taxonomicName id="30A04D3DFFBF441F6483F959FE2E4E80" authorityName="Leach" authorityYear="1815" box="[403,501,1714,1740]" class="Insecta" family="Baetidae" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="family">Baetidae</taxonomicName>
(including
<taxonomicName id="30A04D3DFFBF441F6765F959FCF54E81" box="[629,814,1714,1741]" class="Insecta" family="Baetidae" genus="Labiobaetis" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="species" species="undetermined">
<emphasis id="C5D4EAACFFBF441F6765F959FD224E80" box="[629,761,1714,1740]" italics="true" pageId="7" pageNumber="518">Labiobaetis</emphasis>
spp.
</taxonomicName>
and
<taxonomicName id="30A04D3DFFBF441F6673F959FB7C4E80" baseAuthorityName="Muller-Liebenau" baseAuthorityYear="1982" box="[867,1191,1714,1740]" class="Insecta" family="Baetidae" genus="Acentrella" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="species" species="vera" subGenus="Liebebiella">
<emphasis id="C5D4EAACFFBF441F6673F959FC0C4E80" box="[867,983,1714,1740]" italics="true" pageId="7" pageNumber="518">Acentrella</emphasis>
(
<emphasis id="C5D4EAACFFBF441F66F7F959FBBE4E80" box="[999,1125,1714,1740]" italics="true" pageId="7" pageNumber="518">Liebebiella</emphasis>
)
<emphasis id="C5D4EAACFFBF441F6165F958FB7C4E80" box="[1141,1191,1715,1740]" italics="true" pageId="7" pageNumber="518">vera</emphasis>
</taxonomicName>
),
<taxonomicName id="30A04D3DFFBF441F61ADF959FAB24E80" baseAuthorityName="Allen" baseAuthorityYear="1984" box="[1213,1385,1714,1740]" class="Insecta" family="Vietnamellidae" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="family">Vietnamellidae</taxonomicName>
, and
<taxonomicName id="30A04D3DFFBF441F6587F93DFEE74EBC" authorityName="Needham" authorityYear="1901" box="[151,316,1750,1776]" class="Insecta" family="Heptageniidae" kingdom="Animalia" order="Ephemeroptera" pageId="7" pageNumber="518" phylum="Arthropoda" rank="family">Heptageniidae</taxonomicName>
. Environmental parameters recorded at the site include: air temperature: 27.1°C, water temperature: 22.2°C, humidity: 83%, pH: 6.34, and an open canopy. The river substrate was composed of 10% gravel, 10% cobbles, 20% boulders, 50% bedrock, 5% fine sand, and 5% silt. Consistent with the observations of
<bibRefCitation id="93314B4FFFBF441F6036F8F5FE8D4F10" author="Kluge, N. J. &amp; Novikova, E. A." pageId="7" pageNumber="518" pagination="1 - 56" refId="ref6439" refString="Kluge, N. J. &amp; Novikova, E. A. (2011) Systematics of the mayfly taxon Acentrella (Ephemeroptera: Baetidae), with description of new Asian and African species. Russian Entomological Journal, 20 (1), 1 - 56. https: // doi. org / 10.15298 / rusentj. 20.1.01" type="journal article" year="2011">Kluge and Novikova (2011)</bibRefCitation>
and
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, larvae show a preference for wet rocks moistened by fine water spray, particularly on large stones near small waterfalls or in the interstices between large rocks in fast flowing water.
</paragraph>
</subSubSection>
</treatment>
</document>