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<document id="71C1D7A717D54FCDAED51CD367DB925C" ID-DOI="10.26107/RBZ-2024-0025" ID-ISSN="2345-7600" ID-Zenodo-Dep="14683054" ID-ZooBank="079CC651-8D4D-4B95-B022-388B2FA51FE2" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatmentCitations_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1737171912946" checkinUser="felipe" docAuthor="Grootaert, Patrick, Velde, &amp; Isabella Van de" docDate="2024" docId="461287F6FFCCFFC121E7119BED64F95C" docLanguage="en" docName="RafflesBZool.72.303-323.pdf" docOrigin="Raffles Bulletin of Zoology 72" docStyle="DocumentStyle:AF09A0581917EACD12E7F0991C3E7C26.5:RafflesBZool.2019-.journal_article" docStyleId="AF09A0581917EACD12E7F0991C3E7C26" docStyleName="RafflesBZool.2019-.journal_article" docStyleVersion="5" docTitle="Chrysotus ubinensis Grootaert, Velde &amp; de, 2024, new species" docType="treatment" docVersion="2" lastPageNumber="309" masterDocId="BA2BFF8EFFC8FFC7222F1366E83BFFEE" masterDocTitle="New long-legged flies from mangroves on Pulau Ubin (Singapore) (Insecta: Diptera: Dolichopodidae)" masterLastPageNumber="323" masterPageNumber="303" pageNumber="307" updateTime="1737175760734" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="7505F752260017AC73EA9A19065CBD5E">New long-legged flies from mangroves on Pulau Ubin (Singapore) (Insecta: Diptera: Dolichopodidae)</mods:title>
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<mods:namePart id="AADBD109209688384609AFF785946117">Grootaert, Patrick</mods:namePart>
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<mods:namePart id="AFFD105C1ED73CCAB5E4D797128A6710">Velde,</mods:namePart>
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<mods:namePart id="F898984BDD82C169A08EF5565B21E042">Isabella Van de</mods:namePart>
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<mods:title id="41C738DBF2E999A4452C3A2096C2181D">Raffles Bulletin of Zoology</mods:title>
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<mods:date id="C99F34B3D3C22DBF7352E106FA2ACE37">2024</mods:date>
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<taxonomicName id="09BB4D63FFCCFFC321E7119BEC92FCFB" authorityName="Grootaert &amp; Velde &amp; Isabella Van de" authorityYear="2024" box="[968,1193,765,789]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="4" pageNumber="307" phylum="Arthropoda" rank="species" species="ubinensis" status="sp. nov.">
<emphasis id="FCCFEAF2FFCCFFC321E7119BEC92FCFB" bold="true" box="[968,1193,765,789]" italics="true" pageId="4" pageNumber="307">Chrysotus ubinensis</emphasis>
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,
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(
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,
<figureCitation id="56802A65FFCCFFC32686107BEC8CFCDB" box="[1193,1207,797,821]" captionStart="Fig" captionStartId="6.[136,171,1104,1126]" captionTargetBox="[138,1472,189,1092]" captionTargetId="figure-8@6.[126,1491,174,1104]" captionTargetPageId="6" captionText="Fig. 5. Chrysotus ubinensis, new species, male terminalia. A, Hypopygium lateral; B, Hypopygium ventral; C, Epandrial lobe and tip ventral surstylus lateral; D, postgonite. Scale bar = 0.1 mm. Drawings by P. Grootaert." figureDoi="http://doi.org/10.5281/zenodo.14683068" httpUri="https://zenodo.org/record/14683068/files/figure.png" pageId="4" pageNumber="307">5</figureCitation>
)
</paragraph>
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<emphasis id="FCCFEAF2FFCCFFC3216C103BEBCFFC9B" bold="true" box="[835,1012,861,885]" pageId="4" pageNumber="307">Type material.</emphasis>
<materialsCitation id="7ED33CBDFFCCFFC3262F103BEBEAFC5B" collectingDate="2019-04-16" collectionCode="LKCNHM" country="Singapore" location="Pulau Ubin" municipality="Sungei Tock Kew" pageId="4" pageNumber="307" specimenCode="PU22" specimenCount="4" specimenCount-female="3" specimenCount-male="1" typeStatus="holotype">
<typeStatus id="11008842FFCCFFC3262F103BEC5CFC9B" box="[1024,1127,861,885]" pageId="4" pageNumber="307" type="holotype">Holotype</typeStatus>
male.
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,
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,
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,
<specimenCount id="D8BDFD69FFCCFFC3263C101BEC65FC7B" box="[1043,1118,893,917]" count="1" pageId="4" pageNumber="307" type="male">1 male</specimenCount>
,
<specimenCount id="D8BDFD69FFCCFFC32645101BECEEFC7B" box="[1130,1237,893,917]" count="3" pageId="4" pageNumber="307" type="female">3 females</specimenCount>
,
<date id="BA051020FFCCFFC326CF101BED41FC7B" box="[1248,1402,893,917]" pageId="4" pageNumber="307" value="2019-04-16">
<collectingDate id="AA41E9C8FFCCFFC326CF101BED41FC7B" box="[1248,1402,893,917]" pageId="4" pageNumber="307" value="2019-04-16">16 April 2019</collectingDate>
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,
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(
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).
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<materialsCitation id="7ED33CBDFFCCFFC3216C10BBED93FBDB" collectingDate="2018-03-19" collectingDateMax="2019-04-16" collectingDateMin="2018-03-19" collectionCode="PU, ZRCBDP" country="Singapore" location="Pulau Ubin" municipality="Sungei Tock Kew" pageId="4" pageNumber="307" specimenCode="PU22, ZRCBDP0317766" specimenCount="3" specimenCount-female="3" typeStatus="paratype">
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<typeStatus id="11008842FFCCFFC3216C10BBEB85FC1B" box="[835,958,989,1013]" pageId="4" pageNumber="307" type="paratype">Paratypes</typeStatus>
.
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<collectingCountry id="B6AC7670FFCCFFC321E010BBEC7FFC1B" box="[975,1092,989,1013]" name="Singapore" pageId="4" pageNumber="307">Singapore</collectingCountry>
,
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,
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,
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,
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; male,
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,
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.
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<emphasis id="FCCFEAF2FFCCFFC3216C173BEBCDFB9B" bold="true" box="[835,1014,1117,1141]" pageId="4" pageNumber="307">Other material.</emphasis>
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Pulau Ubin, Chek Jawa,
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(
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). More than
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were barcoded from Pulau Ubin:
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_YuTing_
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_
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_
<date id="BA051020FFCCFFC32626167BECBCFADB" box="[1033,1159,1309,1333]" pageId="4" pageNumber="307" value="2016-06-23">
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: GenBank accession code: PP893291;
<specimenCode id="9E1D9E9BFFCCFFC321E9165BECB4FABB" box="[966,1167,1341,1365]" collectionCode="ZRCBDP" pageId="4" pageNumber="307">ZRCBDP0257018</specimenCode>
_Nabilah-Kareen_
<specimenCode id="9E1D9E9BFFCCFFC32776165BED8EFABB" box="[1369,1461,1341,1365]" collectionCode="MIPD" pageId="4" pageNumber="307">MIPD19</specimenCode>
_
<specimenCode id="9E1D9E9BFFCCFFC3216C163BEBB8FA9B" box="[835,899,1373,1397]" collectionCode="PU" country="USA" name="Princeton University" pageId="4" pageNumber="307">PU20</specimenCode>
_
<date id="BA051020FFCCFFC321BE163BEC29FA9B" box="[913,1042,1373,1397]" pageId="4" pageNumber="307" value="2018-03-29">
<collectingDate id="AA41E9C8FFCCFFC321BE163BEC29FA9B" box="[913,1042,1373,1397]" pageId="4" pageNumber="307" value="2018-03-29">29Mar2018</collectingDate>
</date>
. GenBank accession code: PP893292; Pulau Semakau, old mangroves,
<specimenCount id="D8BDFD69FFCCFFC32683161BECC3FA7B" box="[1196,1272,1405,1429]" count="1" pageId="4" pageNumber="307" type="male">1 male</specimenCount>
,
<specimenCount id="D8BDFD69FFCCFFC327291618ED49FA7B" box="[1286,1394,1405,1429]" count="7" pageId="4" pageNumber="307" type="female">7 females</specimenCount>
,
<date id="BA051020FFCCFFC32750161BEB43FA5B" pageId="4" pageNumber="307" value="2013-07-04">
<collectingDate id="AA41E9C8FFCCFFC32750161BEB43FA5B" pageId="4" pageNumber="307" value="2013-07-04">4 July 2013</collectingDate>
</date>
(
<specimenCode id="9E1D9E9BFFCCFFC321AA16FBEBF5FA5B" box="[901,974,1437,1461]" collectionCode="SMO" pageId="4" pageNumber="307">SMO2</specimenCode>
) (Ma6107; male terminalia illustrated). 15 from
<specimenCode id="9E1D9E9BFFCCFFC3216C16DBEBBDFA3B" box="[835,902,1469,1493]" collectionCode="SM" country="Malaysia" name="Sarawak Museum" pageId="4" pageNumber="307">SM02</specimenCode>
,
<specimenCode id="9E1D9E9BFFCCFFC321A016DBEBA7FA3B" box="[911,924,1469,1493]" collectionCode="SM" country="Malaysia" name="Sarawak Museum" pageId="4" pageNumber="307">1</specimenCode>
from
<specimenCode id="9E1D9E9BFFCCFFC321F616DBEC20FA3B" box="[985,1051,1469,1493]" collectionCode="SM" country="Malaysia" name="Sarawak Museum" pageId="4" pageNumber="307">SM01</specimenCode>
,
<specimenCode id="9E1D9E9BFFCCFFC3260B16DBEC0AFA3B" box="[1060,1073,1469,1493]" collectionCode="SM" country="Malaysia" name="Sarawak Museum" pageId="4" pageNumber="307">5</specimenCode>
from
<specimenCode id="9E1D9E9BFFCCFFC3264116DBEC8AFA3B" box="[1134,1201,1469,1493]" collectionCode="SM" country="Malaysia" name="Sarawak Museum" pageId="4" pageNumber="307">SM03</specimenCode>
,
<specimenCode id="9E1D9E9BFFCCFFC3269516DBECFCFA3B" box="[1210,1223,1469,1493]" collectionCode="SM" country="Malaysia" name="Sarawak Museum" pageId="4" pageNumber="307">1</specimenCode>
from SMN2;
<location id="CB64603BFFCCFFC3277916DBED84FA3B" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCCFFC3277916DBED84FA3B" box="[1366,1471,1469,1493]" county="GenBank" municipality="Jayanthi" name="Sarimbun" pageId="4" pageNumber="307">Sarimbun</location>
,
<specimenCode id="9E1D9E9BFFCCFFC3216C16BBEC23FA1B" box="[835,1048,1501,1525]" collectionCode="ZRCBDP" pageId="4" pageNumber="307">ZRCBDP0041305</specimenCode>
_RP161_WTH24_SR03_
<date id="BA051020FFCCFFC3271A16BBED86FA1B" box="[1333,1469,1501,1525]" pageId="4" pageNumber="307" value="2014-05-28">
<collectingDate id="AA41E9C8FFCCFFC3271A16BBED86FA1B" box="[1333,1469,1501,1525]" pageId="4" pageNumber="307" value="2014-05-28">28May2014</collectingDate>
</date>
;
<location id="CB64603BFFCCFFC3216B169BEB89F9FB" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCCFFC3216B169BEB89F9FB" box="[836,946,1533,1557]" county="GenBank" municipality="Jayanthi" name="GenBank" pageId="4" pageNumber="307">GenBank</location>
accession code: PP893294;
<location id="CB64603BFFCCFFC32733169BEC29F9DB" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCCFFC32733169BEC29F9DB" county="GenBank" municipality="Jayanthi" name="Sungei Buloh Wetland Reserve" pageId="4" pageNumber="307">Sungei Buloh Wetland Reserve</location>
,
<specimenCode id="9E1D9E9BFFCCFFC3260C157BECCEF9DB" box="[1059,1269,1565,1589]" collectionCode="ZRCBDP" pageId="4" pageNumber="307">ZRCBDP0084993</specimenCode>
<location id="CB64603BFFCCFFC3272E157BED04F9DB" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCCFFC3272E157BED04F9DB" box="[1281,1343,1565,1589]" county="GenBank" municipality="Jayanthi" name="Minh" pageId="4" pageNumber="307">Minh</location>
_
<specimenCode id="9E1D9E9BFFCCFFC32761157BED8DF9DB" box="[1358,1462,1565,1589]" collectionCode="IDOM" pageId="4" pageNumber="307">IDOM20</specimenCode>
_ SB02_
<date id="BA051020FFCCFFC321A1155BEC2AF9BB" box="[910,1041,1597,1621]" pageId="4" pageNumber="307" value="2016-03-14">
<collectingDate id="AA41E9C8FFCCFFC321A1155BEC2AF9BB" box="[910,1041,1597,1621]" pageId="4" pageNumber="307" value="2016-03-14">14Mar2016</collectingDate>
</date>
;
<location id="CB64603BFFCCFFC32630155BECBDF9BB" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCCFFC32630155BECBDF9BB" box="[1055,1158,1597,1621]" county="GenBank" municipality="Jayanthi" name="GenBank" pageId="4" pageNumber="307">GenBank</location>
accession code: PP893295;
<location id="CB64603BFFCCFFC3216B153BEBC0F99B" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCCFFC3216B153BEBC0F99B" box="[836,1019,1629,1653]" county="GenBank" municipality="Jayanthi" name="Kranji Marshes" pageId="4" pageNumber="307">Kranji Marshes</location>
,
<specimenCode id="9E1D9E9BFFCCFFC32625153BECE0F99B" box="[1034,1243,1629,1653]" collectionCode="ZRCBDP" pageId="4" pageNumber="307">ZRCBDP0329050</specimenCode>
_
<collectingMunicipality id="2E60AC9AFFCCFFC326C5153BED7CF99B" box="[1258,1351,1629,1653]" pageId="4" pageNumber="307">Jayanthi</collectingMunicipality>
_MTJ024_
<specimenCode id="9E1D9E9BFFCCFFC3216C151BEBB1F97B" box="[835,906,1661,1685]" collectionCode="KM" country="Russia" name="Kotel'nich Museum" pageId="4" pageNumber="307">KM04</specimenCode>
_
<date id="BA051020FFCCFFC321B7151BEC20F97B" box="[920,1051,1661,1685]" pageId="4" pageNumber="307" value="2019-05-08">
<collectingDate id="AA41E9C8FFCCFFC321B7151BEC20F97B" box="[920,1051,1661,1685]" pageId="4" pageNumber="307" value="2019-05-08">08May2019</collectingDate>
</date>
.
<collectingCounty id="27654E6CFFCCFFC32609151BECB0F97B" box="[1062,1163,1661,1685]" pageId="4" pageNumber="307">GenBank</collectingCounty>
accession code: PP893296
</materialsCitation>
.
</paragraph>
<paragraph id="CE0436E0FFCCFFC3216C15D8ECCFF91B" blockId="4.[835,1474,1725,1781]" pageId="4" pageNumber="307">
In total,
<specimenCount id="D8BDFD69FFCCFFC3218A15DBEC7CF93B" box="[933,1095,1725,1749]" count="225" pageId="4" pageNumber="307" type="generic">225 specimens</specimenCount>
were barcoded and all specimens had less than 1% difference in barcode.
</paragraph>
</subSubSection>
<subSubSection id="86A1656BFFCCFFC3216C147BED2FF7DB" pageId="4" pageNumber="307" type="diagnosis">
<paragraph id="CE0436E0FFCCFFC3216C147BED2FF7DB" blockId="4.[834,1475,1821,2101]" pageId="4" pageNumber="307">
<emphasis id="FCCFEAF2FFCCFFC3216C147BEB83F8DB" bold="true" box="[835,952,1821,1845]" pageId="4" pageNumber="307">Diagnosis.</emphasis>
A small species (
<quantity id="09439B05FFCCFFC3265B147BECC1F8DB" box="[1140,1274,1821,1845]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" metricValueMax="2.2" metricValueMin="1.8" pageId="4" pageNumber="307" unit="mm" value="2.0" valueMax="2.2" valueMin="1.8">1.82.2 mm</quantity>
). Male postpedicel trapezoid, a little longer than high, with a distinct ventral projection. Females with a shorter trapezoid postpedicel, a little shorter than high, also with a short ventral projection. Frons and face broad in both sexes, parallel-sided, twice as wide as postpedicel. Legs yellow, but mid and hind coxae brown, apical 23 tarsomeres of all legs brownish (somewhat variable in males, in females only apical tarsomere brown). Sternite 8 with a pair of weak macrosetae.
</paragraph>
</subSubSection>
<caption id="9AC46668FFCDFFC2225E1747E93BFBBA" ID-DOI="http://doi.org/10.5281/zenodo.14683066" ID-Zenodo-Dep="14683066" httpUri="https://zenodo.org/record/14683066/files/figure.png" pageId="5" pageNumber="308" startId="5.[113,148,1057,1079]" targetBox="[128,1444,189,1033]" targetPageId="5" targetType="figure">
<paragraph id="CE0436E0FFCDFFC2225E1747E93BFBBA" blockId="5.[113,1451,1057,1108]" pageId="5" pageNumber="308">
Fig. 4.
<taxonomicName id="09BB4D63FFCDFFC222951747E944FBD8" authorityName="Grootaert &amp; Velde &amp; Isabella Van de" authorityYear="2024" box="[186,383,1057,1078]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="5" pageNumber="308" phylum="Arthropoda" rank="species" species="ubinensis" status="sp. nov.">
<emphasis id="FCCFEAF2FFCDFFC222951747E944FBD8" box="[186,383,1057,1078]" italics="true" pageId="5" pageNumber="308">Chrysotus ubinensis</emphasis>
</taxonomicName>
,
<taxonomicNameLabel id="E7FC5789FFCDFFC223A11747EA3DFBD9" box="[398,518,1057,1079]" pageId="5" pageNumber="308" rank="species">new species</taxonomicNameLabel>
. A, Habitus paratype male (Ma6107). B, Paratype female (Ma6107). Photographs by Jayanthi Puniamoorthy.
</paragraph>
</caption>
<subSubSection id="86A1656BFFCDFFC2225E17EDEDB3F94C" pageId="5" pageNumber="308" type="etymology">
<paragraph id="CE0436E0FFCDFFC2225E17EDEA71FB2D" blockId="5.[113,751,1163,1219]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E17EDE8CEFB4D" bold="true" box="[113,245,1163,1187]" pageId="5" pageNumber="308">Etymology.</emphasis>
The species is named after the island, Pulau Ubin, where it was found for the first time.
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E178DEA65FAEC" blockId="5.[113,606,1259,1283]" box="[113,606,1259,1283]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E178DE889FAED" bold="true" box="[113,178,1259,1283]" pageId="5" pageNumber="308">Male.</emphasis>
Length: body
<quantity id="09439B05FFCDFFC2237B178DE990FAEC" box="[340,427,1259,1283]" metricMagnitude="-3" metricUnit="m" metricValue="1.8" pageId="5" pageNumber="308" unit="mm" value="1.8">1.8 mm</quantity>
; wing
<quantity id="09439B05FFCDFFC223D9178DEA61FAEC" box="[502,602,1259,1283]" metricMagnitude="-3" metricUnit="m" metricValue="1.75" pageId="5" pageNumber="308" unit="mm" value="1.75">1.75 mm</quantity>
.
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E164DE9E4FA8D" blockId="5.[113,752,1323,1379]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E164DE88EFAAD" bold="true" box="[113,181,1323,1347]" pageId="5" pageNumber="308">Head.</emphasis>
Frons and face grey dusted, both parallel-sided, wide, two times as wide as postpedicel.
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E16EDE9B1F9AD" blockId="5.[113,753,1419,1603]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E16EDE8DDFA4D" bold="true" box="[113,230,1419,1443]" pageId="5" pageNumber="308">Antennae.</emphasis>
Black. Scape as long as pedicel. Pedicel lacking a long dorsal bristle. Postpedicel trapezoid, a little longer than high, with a distinct ventral projection. Vertical bristle short, ¼ length of ocellar bristle (verticals much longer in female). Palpus yellow, apical bristle not distinct from the other small black bristles.
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E150DE9ECF8CD" blockId="5.[112,753,1643,1827]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E150DE8F7F96D" bold="true" box="[113,204,1643,1667]" pageId="5" pageNumber="308">Thorax.</emphasis>
Mesoscutum metallic green, grey dusted. All bristles pale brownish. 45 pairs of short acrostichal bristles; 6 dorsocentral bristles, anterior most very short, the following dc becoming longer toward scutellum, prescutellar longest and outside the row. A pair of very long marginal scutellar bristles, no bristle at the outside.
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E142DEAFDF86D" blockId="5.[113,753,1867,1923]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E142DE895F88D" bold="true" box="[113,174,1867,1891]" pageId="5" pageNumber="308">Legs.</emphasis>
Yellow, except for brown mid and hind coxae and apical 23 tarsomeres of all legs brownish (not black).
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E14CDEAD4F80D" blockId="5.[112,752,1963,2019]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E14CDE881F82D" bold="true" box="[113,186,1963,1987]" pageId="5" pageNumber="308">Wings.</emphasis>
With a greyish tinge, veins yellowish brown. Squama yellowish with a row of 5 pale brown bristles. Haltere white.
</paragraph>
<paragraph id="CE0436E0FFCDFFC2225E1B6DECA9FAED" blockId="5.[112,753,2059,2115]" lastBlockId="5.[813,1451,1163,1283]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2225E1B6DE8DEF7CD" bold="true" box="[113,229,2059,2083]" pageId="5" pageNumber="308">Abdomen.</emphasis>
Brown in ground-colour with metallic green shine. Sternites with a few long, fine bristles. Male terminalia (
<figureCitation id="56802A65FFCDFFC220EC1B4DEB07FB4D" box="[707,828,1163,2115]" captionStart="Fig" captionStartId="6.[136,171,1104,1126]" captionTargetBox="[138,1472,189,1092]" captionTargetId="figure-8@6.[126,1491,174,1104]" captionTargetPageId="6" captionText="Fig. 5. Chrysotus ubinensis, new species, male terminalia. A, Hypopygium lateral; B, Hypopygium ventral; C, Epandrial lobe and tip ventral surstylus lateral; D, postgonite. Scale bar = 0.1 mm. Drawings by P. Grootaert." figureDoi="http://doi.org/10.5281/zenodo.14683068" httpUri="https://zenodo.org/record/14683068/files/figure.png" pageId="5" pageNumber="308">Fig. 5</figureCitation>
). Eighth sternite with a pair of weak macrosetae. Cercus yellowish, ventral surstylus brown with a black apical spine (
<figureCitation id="56802A65FFCDFFC2211A17ADEB8BFB0D" box="[821,944,1227,1251]" captionStart="Fig" captionStartId="6.[136,171,1104,1126]" captionTargetBox="[138,1472,189,1092]" captionTargetId="figure-8@6.[126,1491,174,1104]" captionTargetPageId="6" captionText="Fig. 5. Chrysotus ubinensis, new species, male terminalia. A, Hypopygium lateral; B, Hypopygium ventral; C, Epandrial lobe and tip ventral surstylus lateral; D, postgonite. Scale bar = 0.1 mm. Drawings by P. Grootaert." figureDoi="http://doi.org/10.5281/zenodo.14683068" httpUri="https://zenodo.org/record/14683068/files/figure.png" pageId="5" pageNumber="308">Fig. 5AC</figureCitation>
). Tip of phallus simple (
<figureCitation id="56802A65FFCDFFC226E717ADED18FB0D" box="[1224,1315,1227,1251]" captionStart="Fig" captionStartId="6.[136,171,1104,1126]" captionTargetBox="[138,1472,189,1092]" captionTargetId="figure-8@6.[126,1491,174,1104]" captionTargetPageId="6" captionText="Fig. 5. Chrysotus ubinensis, new species, male terminalia. A, Hypopygium lateral; B, Hypopygium ventral; C, Epandrial lobe and tip ventral surstylus lateral; D, postgonite. Scale bar = 0.1 mm. Drawings by P. Grootaert." figureDoi="http://doi.org/10.5281/zenodo.14683068" httpUri="https://zenodo.org/record/14683068/files/figure.png" pageId="5" pageNumber="308">Fig. 5A</figureCitation>
). Postgonite conical in lateral view (
<figureCitation id="56802A65FFCDFFC22600178DECBDFAED" box="[1071,1158,1259,1283]" captionStart="Fig" captionStartId="6.[136,171,1104,1126]" captionTargetBox="[138,1472,189,1092]" captionTargetId="figure-8@6.[126,1491,174,1104]" captionTargetPageId="6" captionText="Fig. 5. Chrysotus ubinensis, new species, male terminalia. A, Hypopygium lateral; B, Hypopygium ventral; C, Epandrial lobe and tip ventral surstylus lateral; D, postgonite. Scale bar = 0.1 mm. Drawings by P. Grootaert." figureDoi="http://doi.org/10.5281/zenodo.14683068" httpUri="https://zenodo.org/record/14683068/files/figure.png" pageId="5" pageNumber="308">Fig. 5C</figureCitation>
).
</paragraph>
<paragraph id="CE0436E0FFCDFFC22102164DED97FAAC" blockId="5.[813,1452,1323,1347]" box="[813,1452,1323,1347]" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC22102164DEBBCFAAD" bold="true" box="[813,903,1323,1347]" pageId="5" pageNumber="308">Female.</emphasis>
Length: body
<quantity id="09439B05FFCDFFC2260B164DECF9FAAC" box="[1060,1218,1323,1347]" metricMagnitude="-3" metricUnit="m" metricValue="1.97" metricValueMax="2.18" metricValueMin="1.76" pageId="5" pageNumber="308" unit="mm" value="1.97" valueMax="2.18" valueMin="1.76">1.762.18 mm</quantity>
; wing
<quantity id="09439B05FFCDFFC22726164DED93FAAC" box="[1289,1448,1323,1347]" metricMagnitude="-3" metricUnit="m" metricValue="1.615" metricValueMax="1.95" metricValueMin="1.28" pageId="5" pageNumber="308" unit="mm" value="1.615" valueMax="1.95" valueMin="1.28">1.281.95 mm</quantity>
.
</paragraph>
<paragraph id="CE0436E0FFCDFFC22102160DEDB3F94C" blockId="5.[811,1453,1387,1699]" pageId="5" pageNumber="308">Face as wide as frons, both parallel-sided and two times as wide as postpedicel. Clypeus protruding. Proboscis much stronger than in males, palpus also larger than in males, yellow with black bristles with a distinct apical bristle. Postpedicel in females also trapezoid, a little shorter than high, with a shorter ventral projection. Vertical bristle longer than in males, proclinate and half as long the brown retroclinate ocellar. A postvertical bristle, upper postoculars uniserial brown and becoming pale and longer below. Apical tarsomere of all legs brownish in contrast to the other tarsomeres.</paragraph>
</subSubSection>
<subSubSection id="86A1656BFFCDFFC1210215ADED64F95C" lastPageId="6" lastPageNumber="309" pageId="5" pageNumber="308" type="discussion">
<paragraph id="CE0436E0FFCDFFC1210215ADEB33FA5C" blockId="5.[811,1453,1739,2083]" lastBlockId="6.[136,776,1210,1458]" lastPageId="6" lastPageNumber="309" pageId="5" pageNumber="308">
<emphasis id="FCCFEAF2FFCDFFC2210215ADEB94F90D" bold="true" box="[813,943,1739,1763]" pageId="5" pageNumber="308">Comments.</emphasis>
<taxonomicName id="09BB4D63FFCDFFC2219815ADECAAF90D" authorityName="Grootaert &amp; Velde &amp; Isabella Van de" authorityYear="2024" box="[951,1169,1739,1763]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="5" pageNumber="308" phylum="Arthropoda" rank="species" species="ubinensis" status="sp. nov.">
<emphasis id="FCCFEAF2FFCDFFC2219815ADECAAF90D" box="[951,1169,1739,1763]" italics="true" pageId="5" pageNumber="308">Chrysotus ubinensis</emphasis>
</taxonomicName>
,
<taxonomicNameLabel id="E7FC5789FFCDFFC2268E15ADED1DF90D" box="[1185,1318,1739,1763]" pageId="5" pageNumber="308" rank="species">new species</taxonomicNameLabel>
, is part of a group of six cryptic species in
<collectingCountry id="B6AC7670FFCDFFC2265E158DECE6F8ED" box="[1137,1245,1771,1795]" name="Singapore" pageId="5" pageNumber="308">Singapore</collectingCountry>
that are recognised thanks to the barcoding differing from at least 6.3% to more than 10%. They all have yellow legs, with only the mid and hind coxae brownish, as well as the apical tarsomere that is brownish and, in some species, contrastingly black. All species of this group have a more or less triangular third antennal segment that in the new species is rather large, almost trapezoidal in males with a distinct ventral projection. The third antennal segment is smaller in females and the ventral projection is shorter. In the other species, the third antennal segment is smaller and a ventral projection is indistinct. This means that identification on morphological grounds is difficult and barcoding is necessary, especially because females are more similar than males. On Pulau Ubin, three other species—in addition to the new species—were also found and are very rare. All were females and two species were only found in the secondary forests on Pulau Ubin, Nee Soon, Bukit Timah Nature Reserve, and Kranji Marshes.
</paragraph>
<caption id="9AC46668FFCEFFC122A71736EBE4FB6C" ID-DOI="http://doi.org/10.5281/zenodo.14683068" ID-Zenodo-Dep="14683068" httpUri="https://zenodo.org/record/14683068/files/figure.png" pageId="6" pageNumber="309" startId="6.[136,171,1104,1126]" targetBox="[138,1472,189,1092]" targetPageId="6" targetType="figure">
<paragraph id="CE0436E0FFCEFFC122A71736EBE4FB6C" blockId="6.[136,1474,1104,1155]" pageId="6" pageNumber="309">
Fig. 5.
<taxonomicName id="09BB4D63FFCEFFC122FD1736E9A3FB8B" authorityName="Grootaert &amp; Velde &amp; Isabella Van de" authorityYear="2024" box="[210,408,1104,1125]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="6" pageNumber="309" phylum="Arthropoda" rank="species" species="ubinensis" status="sp. nov.">
<emphasis id="FCCFEAF2FFCEFFC122FD1736E9A3FB8B" box="[210,408,1104,1125]" italics="true" pageId="6" pageNumber="309">Chrysotus ubinensis</emphasis>
</taxonomicName>
,
<taxonomicNameLabel id="E7FC5789FFCEFFC123881736EA1AFB88" box="[423,545,1104,1126]" pageId="6" pageNumber="309" rank="species">new species</taxonomicNameLabel>
, male terminalia. A, Hypopygium lateral; B, Hypopygium ventral; C, Epandrial lobe and tip ventral surstylus lateral; D, postgonite. Scale bar = 0.1 mm. Drawings by P. Grootaert.
</paragraph>
</caption>
<paragraph id="CE0436E0FFCEFFC122A716BCEC8AFB1C" blockId="6.[134,778,1498,2098]" lastBlockId="6.[835,1473,1210,1266]" pageId="6" pageNumber="309">
<emphasis id="FCCFEAF2FFCEFFC122A716BCE9B6FA1C" bold="true" box="[136,397,1498,1522]" pageId="6" pageNumber="309">National distribution.</emphasis>
<materialsCitation id="7ED33CBDFFCEFFC123B716BCEC96FB1C" collectionCode="SMO, SMN" country="Singapore" county="The" location="Although" municipality="It" pageId="6" pageNumber="309" specimenCount="200">
Confirmed by the 225 available barcodes,
<taxonomicName id="09BB4D63FFCEFFC122DC169CE94DF9FC" authorityName="Grootaert &amp; Velde &amp; Isabella Van de" authorityYear="2024" box="[243,374,1530,1554]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="6" pageNumber="309" phylum="Arthropoda" rank="species" species="ubinensis" status="new species">
<emphasis id="FCCFEAF2FFCEFFC122DC169CE94DF9FC" box="[243,374,1530,1554]" italics="true" pageId="6" pageNumber="309">C. ubinensis</emphasis>
</taxonomicName>
,
<taxonomicNameLabel id="E7FC5789FFCEFFC123AE169CEA38F9FC" box="[385,515,1530,1554]" pageId="6" pageNumber="309" rank="species">new species</taxonomicNameLabel>
, is very common in back mangroves on Pulau Ubin (nearly
<specimenCount id="D8BDFD69FFCEFFC123D3157CEAA7F9DC" box="[508,668,1562,1586]" count="200" pageId="6" pageNumber="309" type="generic">200 specimens</specimenCount>
barcoded from 14 of the 26
<collectingMethod id="17FA4EF7FFCEFFC1237E155CEB33F9BF" box="[337,776,1594,1618]" pageId="6" pageNumber="309">stations ever sampled with Malaise traps</collectingMethod>
all over the island). The species is also common in the old back mangroves of Pulau Semakau (
<collectionCode id="A8AAAE25FFCEFFC12066151CEABDF97C" box="[585,646,1658,1682]" pageId="6" pageNumber="309">SMO</collectionCode>
) with more than 20 barcoded specimens, while there was only a single record from the replanted mangroves (
<collectionCode id="A8AAAE25FFCEFFC1200B15DCEA58F93C" box="[548,611,1722,1746]" country="China" lsid="urn:lsid:biocol.org:col:14058" name="Simao District National Medical and Pharmaceutical Institute" pageId="6" pageNumber="309" type="Herbarium">SMN</collectionCode>
), which did not have established back mangroves during the two-year study (20122014).
<location id="CB64603BFFCEFFC12335159CE946F8FC" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCEFFC12335159CE946F8FC" box="[282,381,1786,1810]" country="Singapore" county="The" municipality="It" name="Although" pageId="6" pageNumber="309">Although</location>
many other mangroves were surveyed in
<collectingCountry id="B6AC7670FFCEFFC1228E147CE936F8DC" box="[161,269,1818,1842]" name="Singapore" pageId="6" pageNumber="309">Singapore</collectingCountry>
during the last 15 years, the new species is very rare in other sites; there is a single record from
<location id="CB64603BFFCEFFC120B8145CEB3AF8BC" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCEFFC120B8145CEB3AF8BC" box="[663,769,1850,1874]" country="Singapore" county="The" municipality="It" name="Sarimbun" pageId="6" pageNumber="309">Sarimbun</location>
, a single record from
<location id="CB64603BFFCEFFC1235A143CEAE9F89F" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCEFFC1235A143CEAE9F89F" box="[373,722,1882,1906]" country="Singapore" county="The" municipality="It" name="Sungei Buloh Wetland Reserve" pageId="6" pageNumber="309">Sungei Buloh Wetland Reserve</location>
, and a single record from
<location id="CB64603BFFCEFFC12342141CEA2CF87C" LSID="urn:lsid:plazi:treatment:461287F6FFCCFFC121E7119BED64F95C:CB64603BFFCEFFC12342141CEA2CF87C" box="[365,535,1914,1938]" country="Singapore" county="The" municipality="It" name="Kranji Marshes" pageId="6" pageNumber="309">Kranji Marshes</location>
, which were formerly mangroves but has turned into a freshwater swamp forest.
<collectingMunicipality id="2E60AC9AFFCEFFC122A714DCE8A3F83F" box="[136,152,1978,2001]" pageId="6" pageNumber="309">It</collectingMunicipality>
was also the only record of the species that is not a true back mangrove species. A noteworthy observation is that the haplotypes in the new species do not vary much (less than 0.3%) over all the mangroves in
<collectingCountry id="B6AC7670FFCEFFC120031B7CEAA7F7DC" box="[556,668,2074,2098]" name="Singapore" pageId="6" pageNumber="309">Singapore</collectingCountry>
.
<collectingCounty id="27654E6CFFCEFFC120871B7CEAEAF7DC" box="[680,721,2074,2098]" pageId="6" pageNumber="309">The</collectingCounty>
new species was not yet recognised outside of
<collectingCountry id="B6AC7670FFCEFFC1271F17DCED9BFB3C" box="[1328,1440,1210,1234]" name="Singapore" pageId="6" pageNumber="309">Singapore</collectingCountry>
as morpho-species nor as haplotype
</materialsCitation>
.
</paragraph>
<paragraph id="CE0436E0FFCEFFC1216C167CED64F95C" blockId="6.[835,1475,1305,1714]" pageId="6" pageNumber="309">
<emphasis id="FCCFEAF2FFCEFFC1216C167CECFAFADC" bold="true" box="[835,1217,1305,1330]" pageId="6" pageNumber="309">
General comments on
<taxonomicName id="09BB4D63FFCEFFC12664167FEC81FADF" authorityName="Meigen" authorityYear="1824" box="[1099,1210,1305,1329]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="6" pageNumber="309" phylum="Arthropoda" rank="genus">
<emphasis id="FCCFEAF2FFCEFFC12664167FEC81FADF" bold="true" box="[1099,1210,1305,1329]" italics="true" pageId="6" pageNumber="309">Chrysotus</emphasis>
</taxonomicName>
.
</emphasis>
The barcoding showed that there are several cryptic species of
<taxonomicName id="09BB4D63FFCEFFC126D0165CED50FABC" authorityName="Meigen" authorityYear="1824" box="[1279,1387,1338,1362]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="6" pageNumber="309" phylum="Arthropoda" rank="genus">
<emphasis id="FCCFEAF2FFCEFFC126D0165CED50FABC" box="[1279,1387,1338,1362]" italics="true" pageId="6" pageNumber="309">Chrysotus</emphasis>
</taxonomicName>
present in the same samples. There were at least 10 cryptic species hidden in a
<taxonomicName id="09BB4D63FFCEFFC121FB161CEC7BFA7C" authorityName="Meigen" authorityYear="1824" box="[980,1088,1402,1426]" class="Insecta" family="Dolichopodidae" genus="Chrysotus" kingdom="Animalia" order="Diptera" pageId="6" pageNumber="309" phylum="Arthropoda" rank="genus">
<emphasis id="FCCFEAF2FFCEFFC121FB161CEC7BFA7C" box="[980,1088,1402,1426]" italics="true" pageId="6" pageNumber="309">Chrysotus</emphasis>
</taxonomicName>
with black legs, of which the males are morphologically difficult to distinguish. A thorough study of the male terminalia of this group is needed to see whether they belong to species already described (
<bibRefCitation id="AA2A4B11FFCEFFC127A216BCEB44F9FC" author="Wei L" pageId="6" pageNumber="309" pagination="1 - 158" refId="ref15479" refString="Wei L (2018) A review of the genus Chrysotus Meigen (Diptera: Dolichopodidae) from China with definition of the leigongshanus species group. Oriental Insects, 52 (1): 1 - 158." type="journal article" year="2018">Wei, 2018</bibRefCitation>
). Association of females, representing 6080% of the population, to males is generally very difficult because firstly, females were generally not described and, secondly, they are very similar in morphology. Genetic barcoding is mandatory to provide reliable identifications so that accurate data will become available for ecological studies.
</paragraph>
</subSubSection>
</treatment>
</document>