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<document id="40C9D2579F7446390EE6650B9B3ADBD2" ID-DOI="10.3897/zookeys.1216.129803" ID-ZooBank="2312FE20-8C12-48B2-8D97-CFC920CCF5C2" ID-publisher-id="129803" URI-arpha="A3CDEAEA-9B77-5E53-AEA4-E47BCCB892F1" URI-zoobank="http://zoobank.org/2312FE20-8C12-48B2-8D97-CFC920CCF5C2" article-type="research-article" checkinTime="1729695835341" checkinUser="pensoft" docAuthor="Tong, Xiaoli, Zhou, Zhiheng &amp; Wu, Bangyi" docDate="2024" docId="EB6CF9E72D265178B0A3942A86F283EB" docLanguage="en" docName="ZooKeys 1216: 115-148" docOrigin="ZooKeys 1216" docSource="https://zookeys.pensoft.net/article/129803/download/xml/" docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.generic" docStyleName="PensoftTaxPub.0000.journal_article.generic" docTitle="Branchiobaetis megasinus Tong, Zhou &amp; Wu, 2024, sp. nov." docType="treatment" docUuid="59F827E6-DFA2-4020-9B44-36480650CD3F" docUuidSource="ZooBank" docVersion="2" dtd-version="3.0" lastPageNumber="148" masterDocId="A3CDEAEA9B775E53AEA4E47BCCB892F1" masterDocTitle="First contribution to the genera Branchiobaetis and Megabranchiella (Ephemeroptera, Baetidae) in China, with descriptions of two new species" masterLastPageNumber="148" masterPageNumber="115" pageNumber="115" updateTime="1729696216534" updateUser="ExternalLinkService">
<mods:mods id="4570078DED249C19177578E8E6F520F4" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="B418691945B5F1256CEA21972BE498B1">
<mods:title id="1567863A39B9F8CB4C12AF4FBE602A05">First contribution to the genera Branchiobaetis and Megabranchiella (Ephemeroptera, Baetidae) in China, with descriptions of two new species</mods:title>
</mods:titleInfo>
<mods:name id="E4649BD68356E7B53E37D562585E1F75" type="personal">
<mods:role id="F67584DDD8D81CC6B93469CDE8A560A5">
<mods:roleTerm id="B9D1AFFAB1AFEA8E12443D77C44D02FF">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="E2FF48AEF71247D06752E5F5C9CC1613">Tong, Xiaoli</mods:namePart>
<mods:nameIdentifier id="CF5A9B53EFF6224261411F0C3E16AFD6" type="ORCID">0000-0003-1731-229X</mods:nameIdentifier>
<mods:affiliation id="F3C33CA2613619E0828EE283F8FAF63E">Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou 510642, Guangdong Province, China</mods:affiliation>
</mods:name>
<mods:name id="5D31A2AC28C409DE2A9B70A8D4A90558" type="personal">
<mods:role id="C8A1395E305EDB127FBF93CD4A60BAFD">
<mods:roleTerm id="5B005EF5E975E814E967AF428FB0C15B">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="ACFB1F1141534F8AE2C3F88AD8EC4A03">Zhou, Zhiheng</mods:namePart>
<mods:nameIdentifier id="B1E1F52D21A4ED42B5D68FCD9E91CB3D" type="ORCID">https://orcid.org/0009-0009-0763-8713</mods:nameIdentifier>
<mods:affiliation id="FC0159BB1EEE571F1DEF0AD1E4DAB9B0">Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou 510642, Guangdong Province, China</mods:affiliation>
</mods:name>
<mods:name id="04345F33EBAF2700E7D56BEA8DC0A8C1" type="personal">
<mods:role id="656B2EC3840A0F0E652F6CBBAF117429">
<mods:roleTerm id="707FC677CB5BB236EFEF7AB7BF7015A2">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="17A5F504820CFEA9C9D9C1AA2E5B91B6">Wu, Bangyi</mods:namePart>
<mods:nameIdentifier id="F42D31930F80D4AB5B5626CEA490F6FA" type="ORCID">https://orcid.org/0009-0005-6398-5243</mods:nameIdentifier>
<mods:affiliation id="1479983198FE181034372530BB6BC361">Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou 510642, Guangdong Province, China</mods:affiliation>
</mods:name>
<mods:typeOfResource id="535505C443D4E7243825125C731A235B">text</mods:typeOfResource>
<mods:relatedItem id="352008A64E4195EE0FC470A110BB66DF" type="host">
<mods:titleInfo id="AA641D4BDFC238FF4EDC9A6356C0B8BC">
<mods:title id="A2D178960ED2FF39BF1740433B3C9CB1">ZooKeys</mods:title>
</mods:titleInfo>
<mods:part id="0EC573B19F555653E604EA1D58E2F925">
<mods:date id="C8BF87A36A1AD9F12C8EE92258DE7997">2024</mods:date>
<mods:detail id="E37BA8E93340599B0510EF857CDFE715" type="pubDate">
<mods:number id="048CBDD3F265D5EF0CA4D08F41E4AC3F">2024-10-23</mods:number>
</mods:detail>
<mods:detail id="C6AFDC6234F031D86B70C204CDB61ABE" type="volume">
<mods:number id="9A33F6F14FD978A7A6FAD6397A153036">1216</mods:number>
</mods:detail>
<mods:extent id="3D2EA0EE8BB70647B0D54C3E5A0288F8" unit="page">
<mods:start id="B05D9F4D530D93033B1DC1F406B9E726">115</mods:start>
<mods:end id="80E00A9DB008208B43AE4A095B3B34F8">148</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:classification id="5A39E2DF14320A2B55F6E61B0672314F">journal article</mods:classification>
<mods:identifier id="1735177179CC06673AD5EB84056105D5" type="DOI">10.3897/zookeys.1216.129803</mods:identifier>
<mods:identifier id="F3B72FD26BCDBC67ACF3679A27E2DE4A" type="ZooBank">2312FE20-8C12-48B2-8D97-CFC920CCF5C2</mods:identifier>
</mods:mods>
<treatment id="EB6CF9E72D265178B0A3942A86F283EB" ID-DOI="http://doi.org/10.5281/zenodo.13983384" ID-Zenodo-Dep="13983384" ID-arpha="EB6CF9E7-2D26-5178-B0A3-942A86F283EB" ID-zoobank="https://zoobank.org/59F827E6-DFA2-4020-9B44-36480650CD3F" LSID="urn:lsid:zoobank.org:act:59F827E6-DFA2-4020-9B44-36480650CD3F" LSID-ZBK="urn:lsid:zoobank.org:act:59F827E6-DFA2-4020-9B44-36480650CD3F" httpUri="http://treatment.plazi.org/id/EB6CF9E72D265178B0A3942A86F283EB">
<subSubSection id="D2C4FAE1371196FD1A680F853448EB51" type="nomenclature">
<paragraph id="4E4F1321A8C37203978867E6283EFCEA">
<taxonomicName id="74269560471778BA09BE5EBA0EB3D879" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="B3318485DA3D828BE086F51E004AC804" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="F7435734DCE171901D086B3829F92E2B" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="6D01F7C37B67E9F37917483756BC5311" type="description">
<paragraph id="57F03316B015CA022902A18264FC15CC">
<figureCitation id="0799E323FB42483613658FB3C65F331D" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Branchiobaetis megasinus sp. nov. larval habitus a female larva (dorsal view) b female larva (lateral view) c female larva (ventral view) d final instar male larva (dorsal view) e final instar male larva (ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure8" httpUri="https://binary.pensoft.net/fig/1159405">Figs 8</figureCitation>
,
<figureCitation id="D2F5C02392529EEA3823DFD96C6BD1FD" captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Branchiobaetis megasinus sp. nov. a antennal scape and pedicel b antennal scape and pedicel (final instar) c labrum d left mandible e right mandible." figureDoi="10.3897/zookeys.1216.129803.figure9" httpUri="https://binary.pensoft.net/fig/1159406">9</figureCitation>
,
<figureCitation id="304D9B66A32997C6CA2C4A86DE5C738C" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10</figureCitation>
,
<figureCitation id="1BCCB14C10B9F48F3EB2FD44E932457F" captionStart="Figure 11" captionStartId="F11" captionText="Figure 11. Branchiobaetis megasinus sp. nov. a labium b glossae and paraglossae (left: ventral view; right: dorsal view) c labial palp (left: dorsal view; right: ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure11" httpUri="https://binary.pensoft.net/fig/1159408">11</figureCitation>
,
<figureCitation id="55F31B90BD32B3207E9A52F2D3B1AFAB" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12</figureCitation>
,
<figureCitation id="D4FC9DE9F0C7AAFA11FFE4416BBD857A" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Branchiobaetis megasinus sp. nov. a gills I – VII b external margin of gill c posterior margin of abdominal tergite II d posterior margin of tergite IV e posterior margin of tergite VIII." figureDoi="10.3897/zookeys.1216.129803.figure13" httpUri="https://binary.pensoft.net/fig/1159410">13</figureCitation>
,
<figureCitation id="22F41340107A107EB8B677E113B912A2" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Branchiobaetis megasinus sp. nov. a middle part of abdominal tergite V b posterior margin of sternite VII c gonostyli bud under cuticle of last instar male larva d paraproct." figureDoi="10.3897/zookeys.1216.129803.figure14" httpUri="https://binary.pensoft.net/fig/1159411">14</figureCitation>
,
<figureCitation id="6E6F85C6E52C279F85A03F3CB54B2F4E" captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Branchiobaetis megasinus sp. nov. a, b head of final instar male larva before emergence c female abdomen extracted from last instar larva before emergence d male abdomen extracted from last instar larva before emergence e subimaginal gonostyli extracted from last instar larva f caudalii." figureDoi="10.3897/zookeys.1216.129803.figure15" httpUri="https://binary.pensoft.net/fig/1159412">15</figureCitation>
,
<figureCitation id="8952C26358E1A7567116DE34B5DCBE15" captionStart="Figure 16" captionStartId="F16" captionText="Figure 16. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b costa of fore wing on basal portion c pterostigma area of fore wing." figureDoi="10.3897/zookeys.1216.129803.figure16" httpUri="https://binary.pensoft.net/fig/1159413">16</figureCitation>
,
<figureCitation id="719F64839DFF7FA42FFD1F79202FC998" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EDSAE" type="type material">
<paragraph id="D34A199F496AA7BFD81A39EA77F1F78A">
<heading id="EAAB745CD246D4B4AEB7389E2672F5FF" reason="title">Type material.</heading>
</paragraph>
<paragraph id="5CB3A0B859A4D7E08689A44F2EA2DD51">
<materialsCitation id="FB24356DC2F06FEC4E67F41E7DEF5301" collectingDate="2023-12-30" collectingDateMax="2024-01-01" collectingDateMin="2023-12-30" collectorName="Zhiheng Zhou." country="China" latitude="22.5972" location="Wutongshan River" longLatPrecision="7" longitude="114.2067" municipality="Shenzhen" specimenCount="1" stateProvince="Guangdong" typeStatus="holotype">
<emphasis id="C6090A76F5A0475E72853BE19476FF2E" bold="true">
<emphasis id="87563273D40FADDAE20FCE185415E32C" bold="true" italics="true">
<typeStatus id="EF6A95073604F3FC912177A72A6C049B" type="holotype">Holotype</typeStatus>
</emphasis>
.
</emphasis>
<collectingCountry id="01EC8EF75D47A1029D209BCF3C54A8FE" name="China">China</collectingCountry>
• male larva in alcohol (mature);
<collectingRegion id="7C4C141F736D14FAF0FCD0CB453D13A0" country="China" name="Guangdong">Guangdong</collectingRegion>
,
<collectingMunicipality id="324B6A00CAC63C533D637B942031C35F">Shenzhen</collectingMunicipality>
,
<location id="6C2DA9AEB22D7161292B0E86784B89E5" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:6C2DA9AEB22D7161292B0E86784B89E5" country="China" latitude="22.5972" longLatPrecision="7" longitude="114.2067" municipality="Shenzhen" name="Wutongshan River" stateProvince="Guangdong">Wutongshan River</location>
(
<named-content content-type="dwc:verbatimCoordinates" id="NCID0EWSAE" specific-use="{&quot;type&quot;:&quot;Point&quot;,&quot;coordinates&quot;:[114.206700,22.597200]}">
<geoCoordinate id="06343AA100A1AB37C8E0CD5DCE5378A8" degrees="22.5972" direction="north" orientation="latitude" precision="5" value="22.5972">22.5972 ° N</geoCoordinate>
,
<geoCoordinate id="ED12CA35D111723E98B6F9601DEDDD5B" degrees="114.2067" direction="east" orientation="longitude" precision="5" value="114.2067">114.2067 ° E</geoCoordinate>
</named-content>
);
<date id="794CC4C7D6C43E994A781444D8C427AA" value="2023-12-30">
<collectingDate id="3CE571B96550127B5356A8A8EFD20296" value="2023-12-30">30. xii. 2023</collectingDate>
</date>
–
<date id="328B9B20DA5E4D9E7FB7AD11D390CDB6" value="2024-01-01">
<collectingDate id="6259E2BDF08782022B116469AAC82AF5" value="2024-01-01">1. i. 2024</collectingDate>
</date>
; leg.
<collectorName id="97048A2435FEE57E9D544FEF4ED85188">Zhiheng Zhou.</collectorName>
</materialsCitation>
<emphasis id="02E3226D5AA10F2E905C1A1B5E50BF86" bold="true" italics="true">
<typeStatus id="A5363F1DFA1E4880F6C2C157BEDA72E6" type="paratype">Paratypes</typeStatus>
</emphasis>
(in alcohol): • 9 mature larvae, locality and date as
<typeStatus id="D62963EE1EF2086D307F8E003673CB5B" type="holotype">holotype</typeStatus>
•
<materialsCitation id="09E1AEDEC9719430A189D302E7E12B19" collectingDate="1996-11-19" collectingDateMax="1999-02-25" collectingDateMin="1996-11-19" collectorName="Xiaoli Tong &amp; Maria Salas" country="Hong Kong" county="Shing Mum" location="Tai Po Kau Forest" municipality="Tai Po Kau Forest" specimenCount="7" specimenCount-larva="6" specimenCount-male="1" typeStatus="paratype">
<specimenCount id="5D2F7C5D5F0BDA59EBD0FD89C6D67E08" count="3" type="larva">3 larvae</specimenCount>
,
<specimenCount id="F90F4093EC5281A0B792C9FA48CF116A" count="1" type="male">1 male</specimenCount>
imago (reared specimen) on slide;
<location id="27456ABAE7002D37A3B66FBEEE9DB3FD" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:27456ABAE7002D37A3B66FBEEE9DB3FD" country="Hong Kong" county="Shing Mum" municipality="Tai Po Kau Forest" name="Tai Po Kau Forest">Tai Po Kau Forest</location>
Stream,
<collectingCountry id="8489544EC4728DFF6D4173E79F62375B" name="Hong Kong">Hong Kong</collectingCountry>
;
<date id="53AB415AD3F9F9FE937349FB4E7E8300" value="1999-02-25">
<collectingDate id="351E5378C1C8AEDB03F0C77B44C4F393" value="1999-02-25">25. ii. 1999</collectingDate>
</date>
; leg.
<collectorName id="71AE562924F3392B79CC2D9F80123F58">Xiaoli Tong</collectorName>
;
<specimenCount id="0A8C7E5DEE401C09FECDD0D70B6E07B0" count="1" type="larva">1 larva</specimenCount>
(on slide);
<location id="6C7287C52D9B6E19CFD8BA0F845AA0C2" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:6C7287C52D9B6E19CFD8BA0F845AA0C2" country="Hong Kong" county="Shing Mum" municipality="Tai Po Kau Forest" name="Tai Po Kau Forest">Tai Po Kau Forest</location>
Stream,
<collectingCountry id="7361D40A46A53914D0472DB58FE85455" name="Hong Kong">Hong Kong</collectingCountry>
;
<date id="38B6A3F1E5526F68D4D88457A0EC5794" value="1996-11-19">
<collectingDate id="4B8D7BE1D53C04955A65D83834850612" value="1996-11-19">19. xi. 1996</collectingDate>
</date>
; leg.
<collectorName id="D698961F65C0BB66F9BC8DFAB05E656F">Xiaoli Tong</collectorName>
;
<specimenCount id="4673FE70213F404D2E36A45EE78E37C6" count="1" type="larva">1 larva</specimenCount>
;
<collectingMunicipality id="372B0F162A1632AC918FE42C46398EF8">Tai Po Kau Forest</collectingMunicipality>
Stream,
<collectingCountry id="40F07AA4788F18A1F22186DE127E6C7B" name="Hong Kong">Hong Kong</collectingCountry>
;
<date id="B04270E7EF48681B47FBD0E39DC697A2" value="1997-02-26">
<collectingDate id="FFE2A837E5F64A6949437FFB86379303" value="1997-02-26">26. ii. 1997</collectingDate>
</date>
; leg.
<collectorName id="FC0C23059FBF9EA4FE3D8E1D75B9B526">Maria Salas</collectorName>
;
<specimenCount id="B6672BA205C10CE62F806EFD142477ED" count="1" type="larva">1 larva</specimenCount>
(on slide);
<collectingCounty id="38401C26A300712A1AA127B53479D157">Shing Mum</collectingCounty>
,
<collectingCountry id="C014DF0FB291B48D80A139A0DE43C355" name="Hong Kong">Hong Kong</collectingCountry>
;
<date id="32A676CD499EC7D210D2D0505E516662" value="1997-01-07">
<collectingDate id="496195AD00F80F2CCDE6C5DD420E6C6E" value="1997-01-07">7. i. 1997</collectingDate>
</date>
; leg.
<collectorName id="8F8834B64EA0A8B0FEB1818DB0E9F0B4">Xiaoli Tong</collectorName>
</materialsCitation>
•
<materialsCitation id="2052B130D0118F9F354ADE2494252232" collectingDate="1994-09-16" collectingDateMax="1998-03-07" collectingDateMin="1994-09-16" collectorName="Xiaoli Tong" country="Hong Kong" county="Longmen County" location="Ma Po Mei" municipality="Guangdong" specimenCount="4" specimenCount-larva="4" typeStatus="paratype">
<specimenCount id="B95DD81CE6E259F4D38A8F06A4EB2F4F" count="2" type="larva">2 larvae</specimenCount>
;
<location id="AAD34AE37EF376CCEF45ADEF9DE32F09" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:AAD34AE37EF376CCEF45ADEF9DE32F09" country="Hong Kong" county="Longmen County" municipality="Guangdong" name="Ma Po Mei">Ma Po Mei</location>
,
<collectingCountry id="CE500515892E90F5AB7B87F39C0C2F09" name="Hong Kong">Hong Kong</collectingCountry>
;
<date id="7BCFBC3C6195EE7E39DC4C9536A7F629" value="1997-10-10">
<collectingDate id="A29E1A3682435247E77BA4F053D65758" value="1997-10-10">10. x. 1997</collectingDate>
</date>
; leg.
<collectorName id="C0F1A8E60FA0A82772782C141283FF8F">Xiaoli Tong</collectorName>
;
<specimenCount id="3FFA1DFBBD27828AC767E3D4AFB5901A" count="1" type="larva">1 larva</specimenCount>
(on slide);
<location id="5276FCA5CC528E0C776AEF256981CBAB" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:5276FCA5CC528E0C776AEF256981CBAB" country="Hong Kong" county="Longmen County" municipality="Guangdong" name="Ma Po Mei">Ma Po Mei</location>
,
<collectingCountry id="9D2308B2154F82B42786C7F224793283" name="Hong Kong">Hong Kong</collectingCountry>
;
<date id="5B3331FB7257D118ACCA332108A19DA8" value="1998-03-07">
<collectingDate id="C50D01B85BBBED50E03F5A92B1CC47E1" value="1998-03-07">7. iii. 1998</collectingDate>
</date>
; leg.
<collectorName id="99E480856BA77B45A731D9FD3A992696">Xiaoli Tong</collectorName>
;
<specimenCount id="EC57E0724A02E098B72623CACED10BC5" count="1" type="larva">1 larva</specimenCount>
(on slide);
<location id="296D799898493C901173F7A0DDDD31DF" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:296D799898493C901173F7A0DDDD31DF" country="Hong Kong" county="Longmen County" municipality="Guangdong" name="Mt. Nankunshan">Mt. Nankunshan</location>
,
<collectingCounty id="004E085FE1F52FA531096ABB1142A254">Longmen County</collectingCounty>
,
<collectingMunicipality id="3DFB55D484D00DD0B6C8205BBC77E52B">Guangdong</collectingMunicipality>
;
<date id="4CF33E9F125D047F96CA88F292C8E7B7" value="1994-09-16">
<collectingDate id="74A309381433842FF1887B9FF3C89B6D" value="1994-09-16">16. ix. 1994</collectingDate>
</date>
; leg.
<collectorName id="463C589717AF16AF0957C191352C48D0">Xiaoli Tong</collectorName>
</materialsCitation>
•
<materialsCitation id="E010F5187372F8838FD9814F070791ED" collectingDate="2023-10-31" collectorName="Xiaoli Tong &amp; Zhiheng Zhou &amp; Bangyi Wu" country="Hong Kong" county="Boluo County" location="Mt. Luofushan" municipality="Guangdong" specimenCount="3" specimenCount-larva="3" typeStatus="paratype">
<specimenCount id="2311A62EC41A01FEF1AE7578BA399EE7" count="3" type="larva">3 larvae</specimenCount>
(1 on slide),
<location id="BFCC7C0BCDBED23268E49E8FA5273631" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:BFCC7C0BCDBED23268E49E8FA5273631" country="Hong Kong" county="Boluo County" municipality="Guangdong" name="Mt. Luofushan">Mt. Luofushan</location>
,
<collectingCounty id="C2FD9D25160306FD9F81CE5291CD1B17">Boluo County</collectingCounty>
,
<collectingMunicipality id="123169887DDF9B2E48964A4BF8CFC120">Guangdong</collectingMunicipality>
;
<date id="ED642216FD28CDE8B8CAE31B7D3120FC" value="2023-10-31">
<collectingDate id="FE6BD8148820414D855CE182D2C0C2FB" value="2023-10-31">31. x. 2023</collectingDate>
</date>
; leg.
<collectorName id="DAFF4FD217142155C4873F660D0CF5DE">Xiaoli Tong</collectorName>
,
<collectorName id="EDF364B7C511E67F58C3D38DC562CB78">Zhiheng Zhou</collectorName>
&amp;
<collectorName id="8631215560083914D3E2B3F72B5100D0">Bangyi Wu</collectorName>
</materialsCitation>
•
<materialsCitation id="0386803F15FC5F99C6DB1D9874C218D0" collectingDate="2024-03-23" collectingDateMax="2024-03-24" collectingDateMin="2024-03-23" collectorName="Zhiheng Zhou &amp; Bangyi Wu." country="Hong Kong" county="Guangdong" location="Liuxihe River" municipality="Guangzhou" specimenCount="5" specimenCount-larva="5" typeStatus="paratype">
<specimenCount id="01415199E5CF682F42E7FD0E029C69E0" count="5" type="larva">5 larvae</specimenCount>
(1 on slide); upper reaches of
<location id="FD58E52459E6BABC09789BE4EE87476F" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:FD58E52459E6BABC09789BE4EE87476F" country="Hong Kong" county="Guangdong" municipality="Guangzhou" name="Liuxihe River">Liuxihe River</location>
,
<location id="0C4700A15194A5DC0B98FC37691D2DB6" LSID="urn:lsid:plazi:treatment:EB6CF9E72D265178B0A3942A86F283EB:0C4700A15194A5DC0B98FC37691D2DB6" country="Hong Kong" county="Guangdong" municipality="Guangzhou" name="Conghua">Conghua</location>
,
<collectingMunicipality id="D58248F970EF43B455BF31ED3D6AF233">Guangzhou</collectingMunicipality>
,
<collectingCounty id="5AFD3ECB6EE5F8B49CE8456758138134">Guangdong</collectingCounty>
;
<date id="5BC6C482EF9358DF2C715CAB6719EB5A" value="2024-03-23" valueMax="2024-03-24" valueMin="2024-03-23">
<collectingDate id="15F1954388BEA1A829969904EA7E52A7" value="2024-03-23" valueMax="2024-03-24" valueMin="2024-03-23">23–24. iii. 2024</collectingDate>
</date>
; leg.
<collectorName id="9AAAD7EF038AADDB4BEFDA90E59F4AEF">Zhiheng Zhou</collectorName>
&amp;
<collectorName id="3B4E7B5E3CBAAB73CA1D35464E833BBC">Bangyi Wu.</collectorName>
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0E5SAE" type="description">
<paragraph id="9E29555DF9259BADAF3F810A4FCBDB8C">
<heading id="BC5B5CCBCCDD8E801553C9D305FF4EE0" reason="title">Description.</heading>
</paragraph>
<paragraph id="677350BAF118828B9B0FA9762BC38229">
<emphasis id="72278067E36EE739B97301ADC9A73FB0" bold="true">Larva</emphasis>
(Fig.
<figureCitation id="5B1D0E5D2A2710EB00E010B5A558ADFF" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Branchiobaetis megasinus sp. nov. larval habitus a female larva (dorsal view) b female larva (lateral view) c female larva (ventral view) d final instar male larva (dorsal view) e final instar male larva (ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure8" httpUri="https://binary.pensoft.net/fig/1159405">8 a – e</figureCitation>
). Body length (mm): female 7.0–8.5, male larvae slightly shorter than female, 6.0–7.5; antenna 3.0–4.0; cerci 3.0–4.0, paracercus ~ 4 / 5 length of cerci.
</paragraph>
<caption id="95E0A00D2EDEEA6568876221B55FB990" ID-DOI="10.3897/zookeys.1216.129803.figure8" ID-arpha="4836E0FB-0140-5A74-8F57-E6D287EFE5A9" httpUri="https://binary.pensoft.net/fig/1159405" startId="F8">
<paragraph id="712AEB6CC8BA87FD6E750C573423F988">
<label id="C72F764DBE35B474CFAD7537425648D6">Figure 8.</label>
</paragraph>
<paragraph id="B960C2CAE2E0CB3EF0973F8701E140C6">
<taxonomicName id="B5679731D496C73A5BDBAC1EEE42342D" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="095ABFEFFC7762DA06B795F6688438BE" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="4AC3206E39101D3486181C6C2EB0C357" rank="species">sp. nov.</taxonomicNameLabel>
larval habitus
<emphasis id="B8B2A856CCEE5CCE0E1DF55F6850386E" bold="true">a</emphasis>
female larva (dorsal view)
<emphasis id="D467D0B8DE94A75078BE5CE9EBADFA28" bold="true">b</emphasis>
female larva (lateral view)
<emphasis id="8E4DBA55CC815C8B66E70374A2502655" bold="true">c</emphasis>
female larva (ventral view)
<emphasis id="60351CA511F995590276376AA0567008" bold="true">d</emphasis>
final instar male larva (dorsal view)
<emphasis id="814D73D25B89058F33DB00BD9190E5E9" bold="true">e</emphasis>
final instar male larva (ventral view).
</paragraph>
</caption>
<paragraph id="A8C6127B5017B5FBCB47F89C4AB2075F">
<emphasis id="532230915961F3B25926C83BC085B86A" bold="true">
<emphasis id="7E6D81679A9F38D89201AAA549206396" bold="true" italics="true">Cuticular colouration</emphasis>
.
</emphasis>
Body mainly brown or brownish green (in life) dorsally. Vertex uniformly brown. Antennal scape brown with off-white apex, pedicel off-white, flagellum pale brown. Pronotum mainly brown with irregular dark brown marks, meso- and metanotum mainly brown with irregular cream marks near base of forewing pads and a pair of small cream spots submedially. Legs contrasting bicoloured. Femur off-white with a large dark brown band medially and dark brown macula proximally and apically; tibia off-white with dark brown macula basally and distally; tarsus off-white with dark brown band apically. Abdominal tergites I –
<collectionCode id="6A17968C2B22DE574A16AB86E4506135">IV</collectionCode>
and
<collectionCode id="B98D61DDDD87D96E9391BF977629F024" country="Norway" name="Mykotektet, National Veterinary Institute">VI</collectionCode>
– IX brown with a pair of cream stripes laterally;
<collectionCode id="91898853B9DC3E03D2B0A86D30FE943D" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" type="Museum">V</collectionCode>
brown with a cream, oval macula anterior medially and a pair of cream stripes laterally; X with yellow-brown shading to cream in the anterior portion and brown in posterior 1 / 2; tergites II – VIII with a pair of oblique dark brown medio-anterior sigilla and a pair of medioposterior sigilla (Figs
<figureCitation id="337C5D04C24B09564589DB05ED940820" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Branchiobaetis megasinus sp. nov. a gills I – VII b external margin of gill c posterior margin of abdominal tergite II d posterior margin of tergite IV e posterior margin of tergite VIII." figureDoi="10.3897/zookeys.1216.129803.figure13" httpUri="https://binary.pensoft.net/fig/1159410">13 e</figureCitation>
,
<figureCitation id="96AA9285DB3D1DAAFCE3EC0BA8C45B80" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Branchiobaetis megasinus sp. nov. a middle part of abdominal tergite V b posterior margin of sternite VII c gonostyli bud under cuticle of last instar male larva d paraproct." figureDoi="10.3897/zookeys.1216.129803.figure14" httpUri="https://binary.pensoft.net/fig/1159411">14 a</figureCitation>
). Abdominal sternites with cream shading to pale brown posteriorly. Cerci cream to yellow-brown with dark brown bands medially and distally (Figs
<figureCitation id="187EAF6BC4E7B11EE4E133F3E8C0259F" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Branchiobaetis megasinus sp. nov. larval habitus a female larva (dorsal view) b female larva (lateral view) c female larva (ventral view) d final instar male larva (dorsal view) e final instar male larva (ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure8" httpUri="https://binary.pensoft.net/fig/1159405">8 a – e</figureCitation>
,
<figureCitation id="94A78907F5FFF2EF841AE9E020449A42" captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Branchiobaetis megasinus sp. nov. a, b head of final instar male larva before emergence c female abdomen extracted from last instar larva before emergence d male abdomen extracted from last instar larva before emergence e subimaginal gonostyli extracted from last instar larva f caudalii." figureDoi="10.3897/zookeys.1216.129803.figure15" httpUri="https://binary.pensoft.net/fig/1159412">15 f</figureCitation>
); paracercus cream to yellow-brown with dark brown band near terminal; primary swimming bristles dark brown.
</paragraph>
<paragraph id="9170698727DE2AD041AAD50DC0AE1B51">
<emphasis id="E15BD4E850356C8A5AFC83AD2E8B437C" bold="true" italics="true">Precursors of turbinate eyes</emphasis>
(Figs
<figureCitation id="B3876700B1D73D93F25E96ADF5B39345" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Branchiobaetis megasinus sp. nov. larval habitus a female larva (dorsal view) b female larva (lateral view) c female larva (ventral view) d final instar male larva (dorsal view) e final instar male larva (ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure8" httpUri="https://binary.pensoft.net/fig/1159405">8 d, e</figureCitation>
,
<figureCitation id="09AC4E211BEBBEF4A9A4D0FF6EF2DE1C" captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Branchiobaetis megasinus sp. nov. a, b head of final instar male larva before emergence c female abdomen extracted from last instar larva before emergence d male abdomen extracted from last instar larva before emergence e subimaginal gonostyli extracted from last instar larva f caudalii." figureDoi="10.3897/zookeys.1216.129803.figure15" httpUri="https://binary.pensoft.net/fig/1159412">15 a, b</figureCitation>
) in last instar male larvae normal, without elevated area with well-expressed facets.
</paragraph>
<paragraph id="25650361ADCE7D1C5ADECFFEA5CE9878">
<emphasis id="5274A5DA81B0FA02C1EF23BD9B1180D6" bold="true" italics="true">Antenna</emphasis>
(Fig.
<figureCitation id="5EBAFA4E94A718E6206CB4F8C2AE5EAE" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Branchiobaetis megasinus sp. nov. larval habitus a female larva (dorsal view) b female larva (lateral view) c female larva (ventral view) d final instar male larva (dorsal view) e final instar male larva (ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure8" httpUri="https://binary.pensoft.net/fig/1159405">8 a – c</figureCitation>
). Antenna ~ 3–4 × of head width; scape smooth, without noticeable setae; inner margin of pedicel with tiny triangular denticles distolaterally (Fig.
<figureCitation id="4B3DEF1D6231EF4A2D9887A4A7ACAF56" captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Branchiobaetis megasinus sp. nov. a antennal scape and pedicel b antennal scape and pedicel (final instar) c labrum d left mandible e right mandible." figureDoi="10.3897/zookeys.1216.129803.figure9" httpUri="https://binary.pensoft.net/fig/1159406">9 a, b</figureCitation>
).
</paragraph>
<caption id="AC0ECF504AB5C99767F5C565EC58F396" ID-DOI="10.3897/zookeys.1216.129803.figure9" ID-arpha="16026FB3-351C-5CBF-A448-F65BDAA4747E" httpUri="https://binary.pensoft.net/fig/1159406" startId="F9">
<paragraph id="88FC45BA0D8C8813F66CB7387F6A7333">
<label id="21C9B3837CB168C7CCD5769D5F80EEC2">Figure 9.</label>
</paragraph>
<paragraph id="0CF9C3F460A7D0B93F1F2171B6132AC6">
<taxonomicName id="D73A03D2296D6C04736E6FCE7EF3A535" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="53705D7759278B80BA7F3367E3B5C514" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="70B4B7FC976C58094A220EB4D2082D3D" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="18EEF73A869D0C443AF8C14FAD9E080E" bold="true">a</emphasis>
antennal scape and pedicel
<emphasis id="6C276E8072382D73311680E15FBB0D0E" bold="true">b</emphasis>
antennal scape and pedicel (final instar)
<emphasis id="22576BADB4E1CF1A6C2FFB15FE393120" bold="true">c</emphasis>
labrum
<emphasis id="FA631F0340DB273D24BB5CC5431135D2" bold="true">d</emphasis>
left mandible
<emphasis id="28F5129FD51C9B4B5EE4FB27DDA38602" bold="true">e</emphasis>
right mandible.
</paragraph>
</caption>
<paragraph id="4557898C540168B32706306B4F0D188E">
<emphasis id="00AC65D4480EE6A4245311A07EC3AC79" bold="true" italics="true">Labrum</emphasis>
(Fig.
<figureCitation id="ECD5FCE06545248A71611B1FC997F712" captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Branchiobaetis megasinus sp. nov. a antennal scape and pedicel b antennal scape and pedicel (final instar) c labrum d left mandible e right mandible." figureDoi="10.3897/zookeys.1216.129803.figure9" httpUri="https://binary.pensoft.net/fig/1159406">9 c</figureCitation>
) nearly rectangular, width / length ratio ~ 1.5; anterior margin bordered with long and feathered setae and a median notch; dorsally with submedial pair of long, robust bristles and submarginal arc of six or seven long, robust bristles on each side of midline, several fine setae scattered proximally; ventral surface with densely fine setae medially and six or seven short, pointed setae laterally and disto-laterally.
</paragraph>
<paragraph id="61CD58A6DDD8110C0234C10576DF69E4">
<emphasis id="53E4372BBCB2CBBF696187AFC0B6C140" bold="true" italics="true">Left mandible</emphasis>
(Fig.
<figureCitation id="7BFE392ADD4CBDBBFCA8123C9876E3F6" captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Branchiobaetis megasinus sp. nov. a antennal scape and pedicel b antennal scape and pedicel (final instar) c labrum d left mandible e right mandible." figureDoi="10.3897/zookeys.1216.129803.figure9" httpUri="https://binary.pensoft.net/fig/1159406">9 d</figureCitation>
). Incisor and kinetodontium fused; incisor with three denticles, kinetodontium with four main denticles decreasing in length and one additional minute denticle between incisor and kinetodontium; prostheca robust, apex with four bluntly denticles and two or three long, pointed denticles; margin between prostheca and mola straight with two or three fine, pointed minute spines; apex of mola without tuft of setae.
</paragraph>
<paragraph id="C22E0C7CF3F37808E2ACC3EA8137ECC0">
<emphasis id="E055FE957573FED19518FA9381B666A4" bold="true" italics="true">Right mandible</emphasis>
(Fig.
<figureCitation id="936B063C5624ADD477C94EFD76451BB8" captionStart="Figure 9" captionStartId="F9" captionText="Figure 9. Branchiobaetis megasinus sp. nov. a antennal scape and pedicel b antennal scape and pedicel (final instar) c labrum d left mandible e right mandible." figureDoi="10.3897/zookeys.1216.129803.figure9" httpUri="https://binary.pensoft.net/fig/1159406">9 e</figureCitation>
). Incisor and kinetodontium fused; incisor with three denticles; kinetodontium with four denticles, inner margin of innermost denticle with three small denticles (Fig.
<figureCitation id="CAB442E5505E1A8DBBE2C6EFA9EE7584" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10 a</figureCitation>
); prostheca slender and toothbrush-like, with many sharp denticles on inner margin apically; margin between prostheca and mola slightly concave, occasionally with 1–3 fine, pointed minute spines; apex of mola with a tuft of straight setae.
</paragraph>
<caption id="A8A786A4BAC4ABD88F079E45B5B6D980" ID-DOI="10.3897/zookeys.1216.129803.figure10" ID-arpha="76E37FF5-5D73-5921-BE9A-C0E9D14FD76B" httpUri="https://binary.pensoft.net/fig/1159407" startId="F10">
<paragraph id="2181FDB96443371871B7AC96999E70B1">
<label id="337951F827162B8A27BFAD5D03C2DD86">Figure 10.</label>
</paragraph>
<paragraph id="105B6750CBE8D3641962A760FA89F86B">
<taxonomicName id="DBC163CCC15B63F3D80911A56565BD5A" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="42AF860F754BF97EBE97BE065E1CC11E" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="709D098A8F3C4FA713DD545D9B26314D" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="6B8350AE0C3A946294B99B981FB0A1CD" bold="true">a</emphasis>
apex of right mandible
<emphasis id="6C296CA0F726C8994954BD5BFE3267AE" bold="true">b</emphasis>
hypopharynx and superlinguae
<emphasis id="8E938F6E42277C368DD124480C40CF21" bold="true">c</emphasis>
accessory gill between stipes and cardo of maxilla
<emphasis id="2189F5E3D89B0730D245EED87B2C57DE" bold="true">d</emphasis>
apex of maxillary palp
<emphasis id="DA2A90EAA855DB144E7B446B72D49B2A" bold="true">e</emphasis>
maxilla
<emphasis id="C206F1265732DF9B4824A647666EB48E" bold="true">f</emphasis>
villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (
<emphasis id="3EA15F8F2F218C132A9C67291A8A5E0D" bold="true">c, e</emphasis>
).
</paragraph>
</caption>
<paragraph id="28C0B2ABBA426F96A9B6AE3418CB6474">
<emphasis id="6CF4CA5BE93FBCF2E7F4E093915C6F33" bold="true" italics="true">Hypopharynx and superlinguae</emphasis>
(Fig.
<figureCitation id="ABCB4D96827856B05ECD23BEABDF115C" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10 b</figureCitation>
). Lingua slightly longer than superlinguae, with numerous fine setae apically. Superlinguae distally rounded with numerous fine setae along apical margin.
</paragraph>
<paragraph id="7A8EB0BBF546A8A847B79231C7465E09">
<emphasis id="6660DC2930DFE2B6C0C6155074075519" bold="true" italics="true">Maxilla</emphasis>
(Fig.
<figureCitation id="5A307A51EA28800D03B945A5FD8AD410" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10 e</figureCitation>
). Galea-lacinia with three robust canines; crown of galea-lacinia with one regular row of 13–15 medium-size arcuate simple setae, second row compound of three dentisetae and row of 7–9 elongated pectinate setae; ventrally with two simple, apical setae under canines. Base of lacinia with one row of five or six long simple setae and one seta perpendicular to lacinia margin. Maxillary palp 2 - segmented, longer than galea-lacinia, two segments subequal in length; apex of segment II with single tiny scale on small cone-shaped projection (Fig.
<figureCitation id="3758DA29FD36E5A91B57D7DE6F37F93E" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10 d</figureCitation>
). Small tongue-like accessory gill located on outer side of the articulation between stipes and cardo (Fig.
<figureCitation id="4D8A03C43C8A8DF037B4786EB67B1E9A" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10 c, e</figureCitation>
).
</paragraph>
<paragraph id="28311AB3F038578F3B02E74D2BAC97C9">
<emphasis id="3B9CE7F25114CB24C5B5F40DB2FA10CE" bold="true" italics="true">Labium</emphasis>
(Fig.
<figureCitation id="7FFD097354A98FCCA22491422CE92CDD" captionStart="Figure 11" captionStartId="F11" captionText="Figure 11. Branchiobaetis megasinus sp. nov. a labium b glossae and paraglossae (left: ventral view; right: dorsal view) c labial palp (left: dorsal view; right: ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure11" httpUri="https://binary.pensoft.net/fig/1159408">11 a</figureCitation>
). Glossae shorter and narrower than paraglossae, triangular with wide base, narrowing toward apex, inner margin of glossae with 7–10 long, simple setae and distal 1 / 3 of outer margin with ~ 5 long, simple setae, apex with three robust setae; paraglossae with two rows of long, robust, curved setae distoventrally, dorsal surface on distal 1 / 2 with one longitudinal row of two or three long, robust, spine-like setae near inner margin (Fig.
<figureCitation id="CB763B61AEC356D0A8B88E6FC24FB290" captionStart="Figure 11" captionStartId="F11" captionText="Figure 11. Branchiobaetis megasinus sp. nov. a labium b glossae and paraglossae (left: ventral view; right: dorsal view) c labial palp (left: dorsal view; right: ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure11" httpUri="https://binary.pensoft.net/fig/1159408">11 b</figureCitation>
); labial palp 3 - segmented, segment I longer than segments II and III combined, with many micropores dorsally; segment II triangular with distinct protuberance apico-laterally, ~ 1.1 × wider than base of segment III, dorsal surface with one longitudinal row of three medium simple setae and many micropores (Fig.
<figureCitation id="19E5B975473C33DACED6F87D2EBC77AA" captionStart="Figure 11" captionStartId="F11" captionText="Figure 11. Branchiobaetis megasinus sp. nov. a labium b glossae and paraglossae (left: ventral view; right: dorsal view) c labial palp (left: dorsal view; right: ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure11" httpUri="https://binary.pensoft.net/fig/1159408">11 c</figureCitation>
); segment III similar to asymmetrical onion-shaped dome, apex usually with a small cone-shaped projection, ventral surface covered with many spine-like, simple setae accompanied by fine setae distally (Fig.
<figureCitation id="B677B781294140F255CB322C3FD9FE7C" captionStart="Figure 11" captionStartId="F11" captionText="Figure 11. Branchiobaetis megasinus sp. nov. a labium b glossae and paraglossae (left: ventral view; right: dorsal view) c labial palp (left: dorsal view; right: ventral view)." figureDoi="10.3897/zookeys.1216.129803.figure11" httpUri="https://binary.pensoft.net/fig/1159408">11 c</figureCitation>
).
</paragraph>
<caption id="7B0BD8B826EEE00E31593CEF0C563946" ID-DOI="10.3897/zookeys.1216.129803.figure11" ID-arpha="F3BCF96C-2CD1-56A4-B876-F0FE33D25D0E" httpUri="https://binary.pensoft.net/fig/1159408" startId="F11">
<paragraph id="7FC28BAC996A42FEDDA18662C80C0DF8">
<label id="F79E628678E1AC73455C385C8DDCDE54">Figure 11.</label>
</paragraph>
<paragraph id="FE14722D21E1DBBF7FF95A2CF82932C8">
<taxonomicName id="749D1B557D25CF79BBA981F809A5B9D4" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="C2069CACFF70074A8C8EED3DBB558D1E" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="5754E40FC4FD001CB164EB5F1624EF9C" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="8C1F5A698320CDEB88A1DBEE3F8747B7" bold="true">a</emphasis>
labium
<emphasis id="2361BEC8D4EAF3FE7598777AEE4E94DA" bold="true">b</emphasis>
glossae and paraglossae (left: ventral view; right: dorsal view)
<emphasis id="659E53C6BEE448E51971CD99DF459F30" bold="true">c</emphasis>
labial palp (left: dorsal view; right: ventral view).
</paragraph>
</caption>
<paragraph id="199C4D19A730197F6AB2106DBC1038A5">
<emphasis id="E7F602B58CE34E3A6918E99E9F92E855" bold="true" italics="true">Hind wing pads</emphasis>
well developed.
</paragraph>
<paragraph id="BF20673F4D4D3835589353E3E823E63E">
<emphasis id="750DF8EA45C71B707F9E8DA5F7A9A499" bold="true" italics="true">Forelegs</emphasis>
(Fig.
<figureCitation id="1F88F71A389F3123980C9ACD8DA07FEB" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 b – f</figureCitation>
). Ratio of foreleg segments (femur to claw) 6.9: 5.9: 3.5: 1.0.
<emphasis id="13CA2839B343051B241A824AD454EC99" italics="true">Femur</emphasis>
. Length ~ 3.5 × maximum width. Dorsal surface covered with numerous crescent scale bases accompanied by fine setae; ventral face with sparse crescent scale bases and fine setae. Outer margin with two rows of different
<typeStatus id="101F8F51752858A6A606AAD340CC3366">type</typeStatus>
setae: one row of 10–13 long, robust, blunt pointed setae and proximal row of 13–17 slender long setae (Fig.
<figureCitation id="816FD1A193AD951215817BC0870A0B72" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 d</figureCitation>
); additional row of small, decurved hook-like setae along dorsal margin; ventral margin with small, apically pointed or rounded, spatulate setae. Apex rounded with many short, stout, hook-like setae anteriorly, dorsoapical setal patch formed by two stout setae. Villopore present and well developed (Figs
<figureCitation id="F3130C771B2AE7D5CD9795FA5953DF6C" captionStart="Figure 10" captionStartId="F10" captionText="Figure 10. Branchiobaetis megasinus sp. nov. a apex of right mandible b hypopharynx and superlinguae c accessory gill between stipes and cardo of maxilla d apex of maxillary palp e maxilla f villopore of femur. Abbreviations: st: stipes, ca: cardo. Red arrows indicate the tongue-like accessory gill (c, e)." figureDoi="10.3897/zookeys.1216.129803.figure10" httpUri="https://binary.pensoft.net/fig/1159407">10 f</figureCitation>
,
<figureCitation id="9C088B60B53119929A16456F51C6BA0F" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 d</figureCitation>
). A finger-like accessory gill on inner side of coxal articulation (between coxa and prosternum); hyaline bubble-like membranous swelling between coxa and trochanter (Fig.
<figureCitation id="D17980168CF3A66D1133A8BC5B5B16EF" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 a</figureCitation>
).
<emphasis id="A59B6C0ADE7D185E0FF76F11F87379AC" italics="true">Tibia</emphasis>
. Outer margin with one row of small, apically decurved hook-like setae and fine setae; ventral margin with row of longer, stout spine-like setae. Tibio-patellar suture present (Fig.
<figureCitation id="C4163F9390E3DFE07C73032DC7144E1F" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 e</figureCitation>
). Both surfaces covered with crescent-shaped scale bases, apically oval or pointed spatulate setae alternating with hair-like setae.
<emphasis id="3AA5780BB8E6C91CC6C95AFEFD8EA075" italics="true">Tarsus</emphasis>
. Outer margin with fine setae and one row of short, curved hook-like setae; ventral margin with one row of ~ 11 stout spine-like pointed setae increasing in length toward apex (Fig.
<figureCitation id="A7214749D1794C4DB43FB3BEA6DC0FDC" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 f</figureCitation>
), apex with single robust, spine-like pointed seta. Both surfaces covered with crescent scale bases.
<tp_taxon-name id="142939DC330647A2A95082A5C3B1765A">
<tp_taxon-name-part id="16B6BEF065E5ADC306BCAB29BF93A99C" reg="Claws" taxon-name-part-type="genus">
<emphasis id="A71A208A183A200B76E8F6670CBE7D96" italics="true">Claws</emphasis>
</tp_taxon-name-part>
</tp_taxon-name>
hooked (Fig.
<figureCitation id="BC8CE677A8C521B8FAF9946BBAEF23BF" captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Branchiobaetis megasinus sp. nov. a accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows) b foreleg of final instar larva c claw d foreleg femur e foreleg tibia f foreleg tarsus. Scale bars: 0.5 mm (b); 0.1 mm (d, e, f)." figureDoi="10.3897/zookeys.1216.129803.figure12" httpUri="https://binary.pensoft.net/fig/1159409">12 c</figureCitation>
), with one row of 11–13 acute teeth, subapical setae absent.
</paragraph>
<caption id="A89E480A776C9314817679512217F9E1" ID-DOI="10.3897/zookeys.1216.129803.figure12" ID-arpha="646CCEC9-E52B-547E-A851-8FF106B857CF" httpUri="https://binary.pensoft.net/fig/1159409" startId="F12">
<paragraph id="2E083150DBAE749720F929359C37243D">
<label id="646CBB4A3A880986BB326696B92899CB">Figure 12.</label>
</paragraph>
<paragraph id="E377137A810FDEF146B575C0C2283F54">
<taxonomicName id="D13555280E12C52F8141B916F3CBFEF7" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="67C64926CE1275FF677FD9C4C0D906E7" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="113C1170E81FC40AF5AA41666689B42E" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="E563F257CC4CA0AA640A48A1E6393058" bold="true">a</emphasis>
accessory gills (vertical arrows) between coxa and prosternum on foreleg and bubble-like membranous swellings (horizontal arrows)
<emphasis id="256332B8ED4B12DEBE02F5F9A35D4AAE" bold="true">b</emphasis>
foreleg of final instar larva
<emphasis id="9A531D6859A3EC987B0174BF8F37D83A" bold="true">c</emphasis>
claw
<emphasis id="94060B125AEA84F045FFA3F0D728D8F0" bold="true">d</emphasis>
foreleg femur
<emphasis id="2343174F030C8D3C72C0FC9F8BCBCEA1" bold="true">e</emphasis>
foreleg tibia
<emphasis id="578603A8B3FBA111C3CABC800283D6AE" bold="true">f</emphasis>
foreleg tarsus. Scale bars: 0.5 mm (
<emphasis id="FB537E242D47C983281C89FED3BD31B9" bold="true">b</emphasis>
); 0.1 mm (
<emphasis id="114C14BF91CDFDF8C83A5085EF088091" bold="true">d, e, f</emphasis>
).
</paragraph>
</caption>
<paragraph id="72411CF36558B66C8AB15EB52758A66F">
<emphasis id="D26812BFA4A6B28AB38424047EBD72B6" bold="true" italics="true">Middle and hind legs</emphasis>
similar to foreleg in structure except for lacking the finger-like accessory gills on base of coxa.
</paragraph>
<paragraph id="D71D254E533EC766B3374CB641C784F9">
<emphasis id="D3CA48058358AB910C7C9A290AAF82C2" bold="true">
<emphasis id="6F106178EEBD4339B486CBE41D4FF8B0" bold="true" italics="true">Abdominal tergites and sternites</emphasis>
.
</emphasis>
Both tergites and sternites densely covered with crescent scale bases and sparse hair-like setae, without any spatulate setae. Posterior margins of tergites I – X with triangular spines increasing in length from I to X (Figs
<figureCitation id="42E9777185115F609F5B9AEAC982791A" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Branchiobaetis megasinus sp. nov. a gills I – VII b external margin of gill c posterior margin of abdominal tergite II d posterior margin of tergite IV e posterior margin of tergite VIII." figureDoi="10.3897/zookeys.1216.129803.figure13" httpUri="https://binary.pensoft.net/fig/1159410">13 c – e</figureCitation>
,
<figureCitation id="AC70DBF1C60E18514107A2533F6DE52E" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Branchiobaetis megasinus sp. nov. a middle part of abdominal tergite V b posterior margin of sternite VII c gonostyli bud under cuticle of last instar male larva d paraproct." figureDoi="10.3897/zookeys.1216.129803.figure14" httpUri="https://binary.pensoft.net/fig/1159411">14 a</figureCitation>
). Posterior margins of sternites I – IX smooth medially, but with row of dentate protuberances laterally (Fig.
<figureCitation id="7DC14BD3ECA92276026219E393E7D64F" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Branchiobaetis megasinus sp. nov. a middle part of abdominal tergite V b posterior margin of sternite VII c gonostyli bud under cuticle of last instar male larva d paraproct." figureDoi="10.3897/zookeys.1216.129803.figure14" httpUri="https://binary.pensoft.net/fig/1159411">14 b</figureCitation>
).
</paragraph>
<caption id="AAF7F5730AA7CF3AE806BB4B77480F8F" ID-DOI="10.3897/zookeys.1216.129803.figure13" ID-arpha="186519A0-848B-5103-9882-6917C6C71B5F" httpUri="https://binary.pensoft.net/fig/1159410" startId="F13">
<paragraph id="50F9A222C1ADA7D439ACEADBDE6D8B25">
<label id="DF3CBD0E14D971E32DBA7AB531F3DF03">Figure 13.</label>
</paragraph>
<paragraph id="01AB3AAEE6168BDA35B52C22F928E999">
<taxonomicName id="602303FA0BCD9ADE4024299300D8437A" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="532A89DB77CEE29EF9638FB835035497" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="4BA64AA01368EDAD5297B3D312A6F6AD" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="AAEBDF464604DED5C1DE96847AFB0622" bold="true">a</emphasis>
gills I – VII
<emphasis id="57B0CF59A0F04799B8B346248ED8E46B" bold="true">b</emphasis>
external margin of gill
<emphasis id="4025EC64458CEA600C2160647B46FFDC" bold="true">c</emphasis>
posterior margin of abdominal tergite II
<emphasis id="20BD8BAC5D357D721F1F007786DE343E" bold="true">d</emphasis>
posterior margin of tergite IV
<emphasis id="D6E4854FBF9BA627AB28AFB6A5738461" bold="true">e</emphasis>
posterior margin of tergite VIII.
</paragraph>
</caption>
<caption id="88168E0A3854CAB53FA5B8E83D8D3C68" ID-DOI="10.3897/zookeys.1216.129803.figure14" ID-arpha="1950C0E1-D30C-5F95-8B68-18148844C66F" httpUri="https://binary.pensoft.net/fig/1159411" startId="F14">
<paragraph id="EAC2E2FB49B3EBA96EF37943D055DAFF">
<label id="C0B42ECB40A1D57444A20807848B0B34">Figure 14.</label>
</paragraph>
<paragraph id="F2D40B256C81F9F961948AB90803295E">
<taxonomicName id="C2BD26AC00C4832981052B3D7948B438" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="C972CD093B428DFFEDFBB41AF6559ECF" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="E55C5FF04F8719C0D979DD1AD84F1826" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="7CC4887C485F0AB792E5A0EE5E6058F0" bold="true">a</emphasis>
middle part of abdominal tergite V
<emphasis id="4F80FA44C4B7D51F564E626A76968FF2" bold="true">b</emphasis>
posterior margin of sternite VII
<emphasis id="E25026FB0C6B9F1D10F6D0E4EABE8114" bold="true">c</emphasis>
gonostyli bud under cuticle of last instar male larva
<emphasis id="1C870F089552F1A608AF527D53D975D0" bold="true">d</emphasis>
paraproct.
</paragraph>
</caption>
<paragraph id="4386A6E9C21585858A0B9D0F8E1D08C8">
<emphasis id="27ACFCF846CEFA98F142C306A20D3EA7" bold="true" italics="true">Gills</emphasis>
(Fig.
<figureCitation id="C27F6315B55510FEA2C338A4BAC552A3" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Branchiobaetis megasinus sp. nov. a gills I – VII b external margin of gill c posterior margin of abdominal tergite II d posterior margin of tergite IV e posterior margin of tergite VIII." figureDoi="10.3897/zookeys.1216.129803.figure13" httpUri="https://binary.pensoft.net/fig/1159410">13 a</figureCitation>
) present on segments I – VII and well tracheated, ratio of gill length from I – VII = 1.0: 1.8: 2.0: 1.9: 1.6: 1.3: 1.0. External margins of all gills with small denticles intercalating fine hair-like setae (Fig.
<figureCitation id="2BAC93A8B61B43FB37B5C798693DD2C9" captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Branchiobaetis megasinus sp. nov. a gills I – VII b external margin of gill c posterior margin of abdominal tergite II d posterior margin of tergite IV e posterior margin of tergite VIII." figureDoi="10.3897/zookeys.1216.129803.figure13" httpUri="https://binary.pensoft.net/fig/1159410">13 b</figureCitation>
), without any marginal spines or spatulate setae.
</paragraph>
<paragraph id="3DA3BAC17F626C9FAB2EC443F800D1C0">
<emphasis id="BC54D86D3FB7A6E28C58C3CF2345A06C" bold="true" italics="true">Paraproct</emphasis>
(Fig.
<figureCitation id="A11A0D898DA3279900D47DA60949507C" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Branchiobaetis megasinus sp. nov. a middle part of abdominal tergite V b posterior margin of sternite VII c gonostyli bud under cuticle of last instar male larva d paraproct." figureDoi="10.3897/zookeys.1216.129803.figure14" httpUri="https://binary.pensoft.net/fig/1159411">14 d</figureCitation>
). Surface scattered with several crescent scale bases, fine setae and many micropores; margin with ~ 12 triangular spines; surface of cercotractor smooth, with 12–15 spines marginally.
</paragraph>
<paragraph id="AB26C7EB6D3B2C95E2E77B011132CB11">
<emphasis id="DC1A870D9269D711F4FCB63FBAAD233E" bold="true" italics="true">Caudalii</emphasis>
(Fig.
<figureCitation id="F939CDD3849F4B4EC2942CD249F26F6F" captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Branchiobaetis megasinus sp. nov. a, b head of final instar male larva before emergence c female abdomen extracted from last instar larva before emergence d male abdomen extracted from last instar larva before emergence e subimaginal gonostyli extracted from last instar larva f caudalii." figureDoi="10.3897/zookeys.1216.129803.figure15" httpUri="https://binary.pensoft.net/fig/1159412">15 f</figureCitation>
). Cerci with a row of swimming bristles on inner side of intersegment, each segment with row of pointed spines distally; paracercus with swimming bristles on both sides of intersegment.
</paragraph>
<caption id="763FA7CFD078BC820C154F1523ECD271" ID-DOI="10.3897/zookeys.1216.129803.figure15" ID-arpha="3A042E1E-89CD-570E-A533-E3D9BB44D2B5" httpUri="https://binary.pensoft.net/fig/1159412" startId="F15">
<paragraph id="467975E84F8AB8C082C3E36B6E938028">
<label id="6D7D10E039D2D8C215F9F2B6F70268BA">Figure 15.</label>
</paragraph>
<paragraph id="B36E2B3472061C53E77FA60105CB09CC">
<taxonomicName id="970DD7BA49AF6C8314B1E662DCEE66B6" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="58B4A4B0CD744F2B1DC804E886D880C2" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="113A37644E62F24D5A1B06A2B963C41C" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="9B2398084553B212BE9B48AD1E7B095F" bold="true">a, b</emphasis>
head of final instar male larva before emergence
<emphasis id="84CC46C4091F9BB20FDD0F3B78F94438" bold="true">c</emphasis>
female abdomen extracted from last instar larva before emergence
<emphasis id="C4AD61566E5A2BFB076A1E09FC455140" bold="true">d</emphasis>
male abdomen extracted from last instar larva before emergence
<emphasis id="708064A19069E580607C41FB38C7BCA7" bold="true">e</emphasis>
subimaginal gonostyli extracted from last instar larva
<emphasis id="EC0E1F8379A431237D07CF7276593384" bold="true">f</emphasis>
caudalii.
</paragraph>
</caption>
<paragraph id="0EEB770DAAC8A1DFBA33CB338807CBD2">
<emphasis id="560833F26AE944BCA029A7E87B9C599D" bold="true" italics="true">Gonostyli bud</emphasis>
folded under cuticle of last instar larvae, segment II of gonostylus bud sharply bent towards middle and segment III sharply bent towards posterolaterally (Fig.
<figureCitation id="09C5C42493155B9A5DA9BB5FA498AD0E" captionStart="Figure 14" captionStartId="F14" captionText="Figure 14. Branchiobaetis megasinus sp. nov. a middle part of abdominal tergite V b posterior margin of sternite VII c gonostyli bud under cuticle of last instar male larva d paraproct." figureDoi="10.3897/zookeys.1216.129803.figure14" httpUri="https://binary.pensoft.net/fig/1159411">14 c</figureCitation>
); subimaginal gonostyli extracted from last instar larva as Fig.
<figureCitation id="37D6323DBF37D60B84FA670BDA67F4D5" captionStart="Figure 15" captionStartId="F15" captionText="Figure 15. Branchiobaetis megasinus sp. nov. a, b head of final instar male larva before emergence c female abdomen extracted from last instar larva before emergence d male abdomen extracted from last instar larva before emergence e subimaginal gonostyli extracted from last instar larva f caudalii." figureDoi="10.3897/zookeys.1216.129803.figure15" httpUri="https://binary.pensoft.net/fig/1159412">15 e</figureCitation>
.
</paragraph>
<paragraph id="AA471691AEF7EFA74C884D4E3F06A523">
<emphasis id="0F8CAB394CE6B5703CC96792936C4A09" bold="true">Male imago.</emphasis>
Body length
<quantity id="F7C85020ECABDCA79AD4576E15E4A2DE" metricMagnitude="-3" metricUnit="m" metricValue="6.4" unit="mm" value="6.4">6.4 mm</quantity>
. Forewing
<quantity id="7FE96381AE83CB272349D5270459292A" metricMagnitude="-3" metricUnit="m" metricValue="6.3" unit="mm" value="6.3">6.3 mm</quantity>
. Cerci 18.0 mm. Turbinate eyes cylindrical (Fig.
<figureCitation id="E011A1D098897C092339B27D6F5F768C" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 b, c</figureCitation>
), slightly widened apically, stalk and facetted surface orange; ocelli off-white with dark brown basal ring. Antennae longer than head capsule; flagella pale brown, pedicels and scapes cream. Pronotum pale with dark brown maculae medially; mesonotum pale to pale brown with brown markings medially and posterolaterally; metanotum yellow-brown to dark brown; thorax dark brown laterally. Forewings hyaline (Fig.
<figureCitation id="0A1330D5984162E4739CEC3708F6BE65" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 d</figureCitation>
), longitudinal veins and paired marginal intercalaries yellow-brown, double intercalary veins longer than distance between corresponding longitudinal veins; costa serrated with pointed spines on basal portion (Fig.
<figureCitation id="597D6086B4EEB474F00CA08A94EE2740" captionStart="Figure 16" captionStartId="F16" captionText="Figure 16. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b costa of fore wing on basal portion c pterostigma area of fore wing." figureDoi="10.3897/zookeys.1216.129803.figure16" httpUri="https://binary.pensoft.net/fig/1159413">16 b</figureCitation>
), pterostigma area transparent washed pale yellow-brown, with four or five slanting cross veins (Figs
<figureCitation id="84034DB5FCE61B51132D0E131C596BE8" captionStart="Figure 16" captionStartId="F16" captionText="Figure 16. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b costa of fore wing on basal portion c pterostigma area of fore wing." figureDoi="10.3897/zookeys.1216.129803.figure16" httpUri="https://binary.pensoft.net/fig/1159413">16 c</figureCitation>
,
<figureCitation id="1CD9FCCAD0A2C629CBA728282EAFA98D" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 d</figureCitation>
); hindwings (Fig.
<figureCitation id="EE37CB5F7D582002DE17F9C50ACC4C33" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 e</figureCitation>
) with acute costal process and three longitudinal veins. Fore femur pale, arched medially (Fig.
<figureCitation id="21DCAEB860F2280E4BE08D1BC197209D" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">
<quantity id="8B109BACBE6BBEEA57044BA7976C3877" metricMagnitude="-2" metricUnit="kg" metricValue="1.7" unit="g" value="17.0">17 g</quantity>
</figureCitation>
), fore tibia yellow-brown, fore tarsus pale yellow-brown; ratio of foreleg femur / tibia / tarsus = 1: 1.4: 1.4; ratio of foreleg tarsal segments = 1.0: 6.6: 5.7: 3.3: 2.0; middle and hind legs similar to foreleg in colouration except with straight femora and apical spine on fused 1
<superScript id="204CB55EFF2EE72327006C1DBE812822">st</superScript>
+ 2
<superScript id="21AA1A4C98905E3D2220FF78609A7C90">nd</superScript>
and 3
<superScript id="C04840581D35D30F4C1690B5F990335B">rd</superScript>
tarsal segments (Fig.
<figureCitation id="D2200B72265A4AD06F46EE49275077B6" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 f</figureCitation>
); all claws with one oval lobe and one pointed curved hook. Abdominal tergites I – VIII rust-red with anterior submedial pair of pale streaks, each with single purple-brown transverse streak along posterior margin, tergites IX – X pale. Genitalia (Figs
<figureCitation id="33108818E50CA5830DA648E655C051A5" captionStart="Figure 16" captionStartId="F16" captionText="Figure 16. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b costa of fore wing on basal portion c pterostigma area of fore wing." figureDoi="10.3897/zookeys.1216.129803.figure16" httpUri="https://binary.pensoft.net/fig/1159413">16 a</figureCitation>
,
<figureCitation id="BEE3F6451BDAED3E39C6C7F9E0BD9B0D" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 a</figureCitation>
): unistyliger cylindrical, inner margin of segment I of gonostylus with distomedial swelling and outer margin with protuberance basally (Fig.
<figureCitation id="77ABF75585A928689145ADB027420638" captionStart="Figure 17" captionStartId="F17" captionText="Figure 17. Male imago of Branchiobaetis megasinus sp. nov. a genitalia b head (anterior view, ) c head (lateral view) d fore wing e hind wing (enlarge, ) f hind leg g foreleg. Scale bars: 0.1 mm (a); 0.5 mm (e, f); 1.0 mm (b, d, g)." figureDoi="10.3897/zookeys.1216.129803.figure17" httpUri="https://binary.pensoft.net/fig/1159414">17 a</figureCitation>
), segment III of gonostylus oblong. Cerci grey-white with rust tints basally.
</paragraph>
<caption id="57BD07F274440F8A3798ED01B461C89B" ID-DOI="10.3897/zookeys.1216.129803.figure16" ID-arpha="7365FCA9-C6ED-5777-B60C-9561FEE1808D" httpUri="https://binary.pensoft.net/fig/1159413" startId="F16">
<paragraph id="589466CFFFAB170DBB5A1F1B8F0D0CB2">
<label id="CCF4572492A6AD3BA8B5C8F57E04F69B">Figure 16.</label>
</paragraph>
<paragraph id="94F75F701E0B0ADFB4A24DDD4A82FC83">
Male imago of
<taxonomicName id="08B7795B4A478440E7E48977ACDEB81E" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="5B22ED08FED827A448D9F3D76463E94C" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="41961C5AB1587147B2A36AE01462DDD8" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="C32E201C3040DB45B29F282B4E78844D" bold="true">a</emphasis>
genitalia
<emphasis id="353C49ECC1822507CC0FCD47F9C3981D" bold="true">b</emphasis>
costa of fore wing on basal portion
<emphasis id="73E04E6B29A2052720E5341DF5F1D926" bold="true">c</emphasis>
pterostigma area of fore wing.
</paragraph>
</caption>
<caption id="323A8DA83D04A9C600910B11A946F8DB" ID-DOI="10.3897/zookeys.1216.129803.figure17" ID-arpha="D3FED087-0FF3-5F26-9631-9744CAF82DF8" httpUri="https://binary.pensoft.net/fig/1159414" startId="F17">
<paragraph id="F36A1872F4BCB2971E1FD9D56D7CA07A">
<label id="71D63B2ECE592756B5BDC19B03435224">Figure 17.</label>
</paragraph>
<paragraph id="409A593A78667FF0191023064F767F85">
Male imago of
<taxonomicName id="F68004911D7D2F3E56A4AC70967799A0" authorityName="Tong &amp; Zhou &amp; Wu" authorityYear="2024" class="Insecta" family="Baetidae" genus="Branchiobaetis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ephemeroptera" phylum="Arthropoda" rank="species" species="megasinus" status="sp. nov.">
<emphasis id="1690AE96CA34E82CCCB0F1E73AA70A38" italics="true">Branchiobaetis megasinus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="D9F9B394134809E00FEC7C4AE86012B5" rank="species">sp. nov.</taxonomicNameLabel>
<emphasis id="B9F6364ACC8FA9E2A8B2129C74EF0E8C" bold="true">a</emphasis>
genitalia
<emphasis id="765C826E31A97B6363B1EAAFDECF137B" bold="true">b</emphasis>
head (anterior view,)
<emphasis id="1C45F008E2FF6FDFDEAD1C3D0DB68B2A" bold="true">c</emphasis>
head (lateral view)
<emphasis id="92800D156B829276567B119B59F9F832" bold="true">d</emphasis>
fore wing
<emphasis id="562938FCB0F35E3E97A18A7DFB8A8B4B" bold="true">e</emphasis>
hind wing (enlarge,)
<emphasis id="20086EB0861C61BAAACB3CD0DF64EBC7" bold="true">f</emphasis>
hind leg
<emphasis id="0881985404B3EE9A2CE4B1C8344C74B3" bold="true">g</emphasis>
foreleg. Scale bars: 0.1 mm (
<emphasis id="FAB2C2C59805208DB2D6F6545A3B145B" bold="true">a</emphasis>
); 0.5 mm (
<emphasis id="61FBC1598C810F4953BFE19902DE9421" bold="true">e, f</emphasis>
); 1.0 mm (
<emphasis id="96D9F7EB88A820022AA00350AA168C6A" bold="true">b, d, g</emphasis>
).
</paragraph>
</caption>
<paragraph id="309509F46AE0AD7E97DB5CFBF02ABC35">
<emphasis id="062390EA7ECF81A13D46CD85A0B14A56" bold="true">Female imago.</emphasis>
Unknown.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EJJAG" type="etymology">
<paragraph id="723F220CB2F97B76D4730DDE94F388F7">
<heading id="01E7F38FA387E4109204A23E7492DAD0" reason="title">Etymology.</heading>
</paragraph>
<paragraph id="6675666DF0398BEFFF9A49BC7CC1A56E">
The specific epithet is a combination of
<emphasis id="12ADE95562E9A663A127BF4A41FA77A2" italics="true">mega</emphasis>
- (derived from the Greek, meaning huge, large) and
<emphasis id="56F8076DEB38EBA9B31808F923B7EB41" italics="true">sinus</emphasis>
(from Latin masculine adjective meaning bay or gulf). Thus, the name refers to the fact that the
<typeStatus id="278B159E5870DDCAB9EA3D778D0D3ABA">type</typeStatus>
series of the new species was found from the Guangdong-Hong Kong-Macao Greater Bay Area (Greater Bay Area).
</paragraph>
</subSubSection>
<subSubSection id="SECID0ETJAG" type="distribution">
<paragraph id="48D5305EDD2E31200521C5F9B346B632">
<heading id="CE2D01F551C24055E437EC0A7C25942D" reason="title">Distribution</heading>
</paragraph>
<paragraph id="08DA299A2452F58AA4BFEF2A789CC158">
<emphasis id="F0227871B7AB97E41D3E0CBB9D4BA016" bold="true">
(Fig.
<figureCitation id="5D88E2DD647E7E331C621A01EA82CF4C" captionStart="Figure 23" captionStartId="F23" captionText="Figure 23. Distribution map of the genera Branchiobaetis and Megabranchiella in China." figureDoi="10.3897/zookeys.1216.129803.figure23" httpUri="https://binary.pensoft.net/fig/1159420">23</figureCitation>
).
</emphasis>
<collectingCountry id="8F4796D7CAE52ECDBC05E84460D73E3A" name="China">China</collectingCountry>
:
<collectingRegion id="A602F507DBA89B133E3910500DA555EB" country="China" name="Guangdong">Guangdong</collectingRegion>
(Shenzhen, Guangzhou, Boluo, Longmen) and
<collectingCountry id="E9B5D8E8856DEE6A49D65FF81E693A4C" name="Hong Kong">Hong Kong</collectingCountry>
(Tai Po Kau Forest Stream, Shing Mun, Chuen Lung, Ma Po Mei, Ng Tung Chai, Mui Tsz Lam, Shek Mun Kap).
</paragraph>
</subSubSection>
<subSubSection id="SECID0EAKAG" type="Larval habitat">
<paragraph id="2D75664D18EAD03206086AC8998253C3">
<heading id="CF3A2B2ABFFE8388ED7FD69B24704D61" reason="title">Larval habitat</heading>
</paragraph>
<paragraph id="212CBAB5C5EC61F9601767E3D712BED8">
<emphasis id="1CD29EBD4693686C02CE1564046DF564" bold="true">
(Fig.
<figureCitation id="28FA9879109E4309A3BB7DE0C270B384" captionStart="Figure 22" captionStartId="F22" captionText="Figure 22. Representative sites of larval habitat a Branchiobaetis megasinus sp. nov. Upper reaches of Liuxihe River, Conghua, Guangdong b Branchiobaetis borealis sp. nov. Lapu River, Weixi, Yunnan c Megabranchiella longusa Phlai-ngam &amp; Tungpairojwong. Bajiao River, Lushui, Yunnan." figureDoi="10.3897/zookeys.1216.129803.figure22" httpUri="https://binary.pensoft.net/fig/1159419">22 a</figureCitation>
).
</emphasis>
The species usually live in moderately rapid, well-aerated riffles at low-altitude (&lt;
<quantity id="DAC1B80842126C69A6DEBD2BB536FBA0" metricMagnitude="2" metricUnit="m" metricValue="3.0" unit="m" value="300.0">300 m</quantity>
a. s. l.) forest streams with gravel and cobble substrates. The physicochemical parameters of the
<typeStatus id="16355D5D254E56EECD8BAC3C6F1CE3FB">type</typeStatus>
locality (Wutongshan River, Shenzhen in December) are as follows: river width
<quantity id="42FBE33BB076AC0BA466F556F95361C1" metricMagnitude="0" metricUnit="m" metricValue="6.0" metricValueMax="7.0" metricValueMin="5.0" unit="m" value="6.0" valueMax="7.0" valueMin="5.0">5–7 m</quantity>
, water depth
<quantity id="C669EA8281427F5FD50096DFE320C90C" metricMagnitude="-1" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" unit="cm" value="15.0" valueMax="20.0" valueMin="10.0">10–20 cm</quantity>
, water temperature 18.3 ° C, current velocity
<quantity id="BF7BD7AEF848917DC5EF8EDD6F980419" metricMagnitude="-1" metricUnit="m" metricValue="2.5" unit="m" value="0.25">0.25 m</quantity>
/ s,
<abbrev id="ABBRID0ENKAG" xlink_title="dissolved oxygen">DO</abbrev>
<quantity id="ED7C317DCE622591DCC3C4DAE050C91F" metricMagnitude="-6" metricUnit="kg" metricValue="9.4" unit="mg" value="9.4">9.4 mg</quantity>
/ l, pH 8.0 and TDS
<quantity id="B4A4DC7799F3C7DC3A91A3DA1B867571" metricMagnitude="-5" metricUnit="kg" metricValue="4.39" unit="mg" value="43.9">43.9 mg</quantity>
/ l.
</paragraph>
</subSubSection>
</treatment>
</document>
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