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<figureCitation captionStart="Figures 11, 12" captionStartId="F6" captionText="Figures 11, 12. Mesembrius spp., habitus, lateral view 11 M. ingratus (Loew) (♂) 12 M. longipilosus sp. nov. (♂)." figureDoi="10.3897/zookeys.1046.57052.figures11-12" httpUri="https://binary.pensoft.net/fig/557467" pageId="0" pageNumber="1">Figs 12</figureCitation>
<figureCitation captionStart="Figures 5257" captionStartId="F25" captionText="Figures 52 - 57. Mesembrius spp., head, frontal view 52 M. copelandi sp. nov. (♂) 53 M. cyanipennis (Bezzi) (♂) 54 M. ingratus (Loew) (♂) 55 M. longipilosus sp. nov. (♂) 56 M. madagascariensis Keiser (♂) 57 M. minor (Bezzi) (♂)." figureDoi="10.3897/zookeys.1046.57052.figures52-57" httpUri="https://binary.pensoft.net/fig/557486" pageId="0" pageNumber="1">, 55</figureCitation>
<figureCitation captionStart="Figures 8994" captionStartId="F32" captionText="Figures 89 - 94. Mesembrius spp., abdomen, dorsal view 89 M. copelandi sp. nov. (♂) 90 M. cyanipennis (Bezzi) (♂) 91 M. ingratus (Loew) (♂) 92 M. longipilosus sp. nov. (♂) 93 M. madagascariensis Keiser (♂) 94 M. minor (Bezzi) (♂)." figureDoi="10.3897/zookeys.1046.57052.figures89-94" httpUri="https://binary.pensoft.net/fig/557493" pageId="0" pageNumber="1">, 92</figureCitation>
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<figureCitation captionStart="Figures 159162" captionStartId="F47" captionText="Figures 159 - 162. Mesembrius spp., proleg, dorsal view 159 M. tarsatus (Bigot) (♂) 160 M. capensis (Macquart) (♂) 161 M. senegalensis (♂) 162 M. longipilosus sp. nov. (♂). Abbreviations: bt-basitarsus, fem-femur, tib-tibia." figureDoi="10.3897/zookeys.1046.57052.figures159-162" httpUri="https://binary.pensoft.net/fig/557507" pageId="0" pageNumber="1">, 162</figureCitation>
<figureCitation captionStart="Figures 205216" captionStartId="F58" captionText="Figures 205 - 216. Mesembrius spp., male genitalia, lateral view 205 M. arcuatus sp. nov. 206 M. caffer (Loew) (nominal morph) 207 M. caffer (Loew) (spined morph) 208 M. ctenifer Hull syn. nov. 209 M. capensis (Macquart) 210 M. chapini Curran 211 M. copelandi sp. nov. 212 M. cyanipennis (Bezzi) 213 M. ingratus (Loew) 214 M. longipilosus sp. nov. 215 M. madagascariensis Keiser 216 M. minor (Bezzi)." figureDoi="10.3897/zookeys.1046.57052.figures205-216" httpUri="https://binary.pensoft.net/fig/557518" pageId="0" pageNumber="1">, 214</figureCitation>
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<figureCitation id="970148E30CCF7AF86094F7023B0AABAE" captionStart="Figures 131134" captionStartId="F40" captionText="Figures 131 - 134. Mesembrius spp., right wing 131 M. copelandi sp. nov. (♂) 132 M. cyanipennis (Bezzi) (♂) 133 M. ingratus (Loew) (♂) 134 M. longipilosus sp. nov. (♂)." figureDoi="10.3897/zookeys.1046.57052.figures131-134" httpUri="https://binary.pensoft.net/fig/557501" pageId="0" pageNumber="1">, 134</figureCitation>
<figureCitation id="85551D14C89B124C91BE021A98F936F5" captionStart="Figures 159162" captionStartId="F47" captionText="Figures 159 - 162. Mesembrius spp., proleg, dorsal view 159 M. tarsatus (Bigot) (♂) 160 M. capensis (Macquart) (♂) 161 M. senegalensis (♂) 162 M. longipilosus sp. nov. (♂). Abbreviations: bt-basitarsus, fem-femur, tib-tibia." figureDoi="10.3897/zookeys.1046.57052.figures159-162" httpUri="https://binary.pensoft.net/fig/557507" pageId="0" pageNumber="1">, 162</figureCitation>
<figureCitation id="27FFDEE2A3B00DE0DF073A274536DC27" captionStart="Figures 205216" captionStartId="F58" captionText="Figures 205 - 216. Mesembrius spp., male genitalia, lateral view 205 M. arcuatus sp. nov. 206 M. caffer (Loew) (nominal morph) 207 M. caffer (Loew) (spined morph) 208 M. ctenifer Hull syn. nov. 209 M. capensis (Macquart) 210 M. chapini Curran 211 M. copelandi sp. nov. 212 M. cyanipennis (Bezzi) 213 M. ingratus (Loew) 214 M. longipilosus sp. nov. 215 M. madagascariensis Keiser 216 M. minor (Bezzi)." figureDoi="10.3897/zookeys.1046.57052.figures205-216" httpUri="https://binary.pensoft.net/fig/557518" pageId="0" pageNumber="1">, 214</figureCitation>
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<paragraph pageId="0" pageNumber="1">Differential diagnosis.</paragraph>
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<emphasis italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
<subSubSection id="631DE44832CD00DB2B8009EE93F19337" pageId="0" pageNumber="1" type="differential diagnosis">
<paragraph id="D37DE0BD64A425A8EA22EFC940EBBD12" pageId="0" pageNumber="1">Differential diagnosis.</paragraph>
<paragraph id="5028C0171358C79B9A6105939AE5A5B6" pageId="0" pageNumber="1">
<taxonomicName id="21FCFA75D36791C121938F75DB5FD555" authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis id="6601CF501FB4EE2DBDD49C7206D3B1F0" italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
</taxonomicName>
sp. nov. males lack an apical pile brush on the profemur and have an unmodified metatibia. The proximal ventral section of the profemur has 3-4 long black pile and the metafemur is covered with long, thin yellow pile and some shorter and thicker black pile on the ventral side, except on the extreme distal end where the black and yellow pile is equally long. The pair of maculae on tergite II are very large and rounded. The species resembles
<taxonomicName lsidName="M. senegalensis" pageId="0" pageNumber="1" rank="species" species="senegalensis">
<emphasis italics="true" pageId="0" pageNumber="1">M. senegalensis</emphasis>
<taxonomicName id="607B9734E6B6FC2266043C2DB2CFBB43" lsidName="M. senegalensis" pageId="0" pageNumber="1" rank="species" species="senegalensis">
<emphasis id="6092F4C3E6EBEA930E3501FB9993587E" italics="true" pageId="0" pageNumber="1">M. senegalensis</emphasis>
</taxonomicName>
, but differs in the shape of the maculae on tergite II (rounded in
<taxonomicName lsidName="M. longipilosus" pageId="0" pageNumber="1" rank="species" species="longipilosus">
<emphasis italics="true" pageId="0" pageNumber="1">M. longipilosus</emphasis>
<taxonomicName id="D9B9C5FDF9C62C1495CFB4C033167DBD" lsidName="M. longipilosus" pageId="0" pageNumber="1" rank="species" species="longipilosus">
<emphasis id="5B80963BF078E9A068E280BD41AFC9F6" italics="true" pageId="0" pageNumber="1">M. longipilosus</emphasis>
</taxonomicName>
sp. nov.; rectangular in
<taxonomicName lsidName="M. senegalensis" pageId="0" pageNumber="1" rank="species" species="senegalensis">
<emphasis italics="true" pageId="0" pageNumber="1">M. senegalensis</emphasis>
<taxonomicName id="3CC7264185F118DBB67F6D013B196AB8" lsidName="M. senegalensis" pageId="0" pageNumber="1" rank="species" species="senegalensis">
<emphasis id="E67E6017DF4C8D097F1013D58DA9D80E" italics="true" pageId="0" pageNumber="1">M. senegalensis</emphasis>
</taxonomicName>
) and the presence of some long black pile on the proximal ventral side of the metafemur (absent in
<taxonomicName lsidName="M. senegalensis" pageId="0" pageNumber="1" rank="species" species="senegalensis">
<emphasis italics="true" pageId="0" pageNumber="1">M. senegalensis</emphasis>
<taxonomicName id="F6651F09456CF30E9A073B293B828C2F" lsidName="M. senegalensis" pageId="0" pageNumber="1" rank="species" species="senegalensis">
<emphasis id="78A86670DE7AAC96AC0C297F65C32B96" italics="true" pageId="0" pageNumber="1">M. senegalensis</emphasis>
</taxonomicName>
). The female is unknown.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="materials_examined">
<paragraph pageId="0" pageNumber="1">Examined material.</paragraph>
<paragraph pageId="0" pageNumber="1">
<taxonomicName authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
<subSubSection id="F5055C6C0E8B8E10FFE2B60CBC6FD105" pageId="0" pageNumber="1" type="materials_examined">
<paragraph id="03C8E78E38DFAFC7DBAC100BC36F7BED" pageId="0" pageNumber="1">Examined material.</paragraph>
<paragraph id="F7B8CCE6AC1DB31DE64910A860D6218C" pageId="0" pageNumber="1">
<taxonomicName id="980C809F03CC5A2543004BDF5FC0D200" authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis id="553A7E61ACEA2033CB28574AA6FD041E" italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
</taxonomicName>
<materialsCitation collectingDate="1972-03-02" collectorName="H. Falke, Det J. R. Vockeroth, Det. K. Jordaens" country="UGANDA" county="Smple" determinerName="Det. K. Jordaens" location="Entebbe" municipality="Barcode of Life" specimenCount="1" typeStatus="Holotype">
<materialsCitation id="DF166ABF7C77B599914EDF898CB06C57" collectingDate="1972-03-02" collectorName="H. Falke, Det J. R. Vockeroth, Det. K. Jordaens" country="UGANDA" county="Smple" determinerName="Det. K. Jordaens" location="Entebbe" municipality="Barcode of Life" specimenCount="1" typeStatus="Holotype">
Jordaens, Goergen &amp; De Meyer:
<typeStatus>Holotype</typeStatus>
<typeStatus id="68930F1EA70AB5684B3A0D30183811F1">Holotype</typeStatus>
, male
<normalizedToken originalValue="“HOLOTYPUS”">
<normalizedToken id="FAE19F70F16CFB72A53D43673637CAAC" originalValue="“HOLOTYPUS”">
&quot;
<typeStatus>HOLOTYPUS</typeStatus>
<typeStatus id="672DA69839C785BFC87B0D4A51EA7293">HOLOTYPUS</typeStatus>
&quot;
</normalizedToken>
&quot;
<location LSID="urn:lsid:plazi:treatment:EB0E1ADA963B5287991F97C8F5258A02:82680D09867534457F3FFC83F86671D0" country="UGANDA" county="Smple" municipality="Barcode of Life" name="Entebbe">Entebbe</location>
<location id="82680D09867534457F3FFC83F86671D0" LSID="urn:lsid:plazi:treatment:EB0E1ADA963B5287991F97C8F5258A02:82680D09867534457F3FFC83F86671D0" country="UGANDA" county="Smple" municipality="Barcode of Life" name="Entebbe">Entebbe</location>
,
<collectingCountry name="Uganda">UGANDA</collectingCountry>
<collectingCountry id="A1F91986D975AC6F917DEEC49359348A" name="Uganda">UGANDA</collectingCountry>
//
<collectingDate value="1972-03-02">2.III.1972</collectingDate>
<collectingDate id="783E0492CDC4F29ACC3B97CD9DEB72BD" value="1972-03-02">2.III.1972</collectingDate>
//
<collectorName>H. Falke</collectorName>
<collectorName id="DCA19F1F6C0C4542FEC13C4502BEF2F9">H. Falke</collectorName>
//
<location LSID="urn:lsid:plazi:treatment:EB0E1ADA963B5287991F97C8F5258A02:303A8C9A5920339E0A874E1549244035" country="UGANDA" county="Smple" municipality="Barcode of Life" name="In forest">In forest</location>
<location id="303A8C9A5920339E0A874E1549244035" LSID="urn:lsid:plazi:treatment:EB0E1ADA963B5287991F97C8F5258A02:303A8C9A5920339E0A874E1549244035" country="UGANDA" county="Smple" municipality="Barcode of Life" name="In forest">In forest</location>
&quot; &quot;
<taxonomicName authorityName="Rondani" authorityYear="1857" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">Mesembrius</taxonomicName>
<taxonomicName id="496C681945DDBF36904F9372CB38131D" authorityName="Rondani" authorityYear="1857" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">Mesembrius</taxonomicName>
// sp. 7 //
<collectorName>Det J.R. Vockeroth</collectorName>
<collectorName id="7029758D681E08DE107CE5854AF060B6">Det J.R. Vockeroth</collectorName>
&quot; &quot;
<taxonomicName authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">Mesembrius longipilosus</taxonomicName>
<taxonomicName id="1083DC3F16ED49ACF1266ABED1BC2E33" authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">Mesembrius longipilosus</taxonomicName>
//
<determinerName>
<collectorName>Det. K. Jordaens</collectorName>
<determinerName id="030E777C4820CEAF32DB3D4BB72DE4D8">
<collectorName id="09F23AEB1FB93E678CF327983E97F577">Det. K. Jordaens</collectorName>
</determinerName>
, 2019&quot; &quot;
<collectingMunicipality>Barcode of Life</collectingMunicipality>
<collectingMunicipality id="3ACF3FE1A6FFCB9122EE4A74EE1CA481">Barcode of Life</collectingMunicipality>
// DNA voucher specimen //
<collectingCounty>Smple</collectingCounty>
<collectingCounty id="AD0F5F89A033FFF1EBAB8937639EC065">Smple</collectingCounty>
| CNC
<taxonomicName authorityName="Rondani" authorityYear="1857" kingdom="Animalia" lsidName="" order="Diptera" pageId="0" pageNumber="1" rank="order">DIPTERA</taxonomicName>
<taxonomicName id="731A84333EDF2BDE3768A60EDE7AF354" authorityName="Rondani" authorityYear="1857" class="Insecta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="order">DIPTERA</taxonomicName>
102305 // BOLD Proc. ID: CNCDB1109-11&quot; &quot; CNC
<taxonomicName authorityName="Rondani" authorityYear="1857" kingdom="Animalia" lsidName="" order="Diptera" pageId="0" pageNumber="1" rank="order">DIPTERA</taxonomicName>
<taxonomicName id="1B3944E47CEEF8E98C1A9F1267B3A79C" authorityName="Rondani" authorityYear="1857" class="Insecta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="order">DIPTERA</taxonomicName>
// # 102305&quot; [CNC].
</materialsCitation>
</paragraph>
<paragraph pageId="0" pageNumber="1">
<materialsCitation collectingDate="1972-01-23" collectingDateMax="1972-01-31" collectingDateMin="1972-01-23" collectorName="H. Falke" country="Uganda" elevation="1160" location="Entebbe" specimenCount="1" specimenCount-male="1" typeStatus="Paratype">
<emphasis bold="true" pageId="0" pageNumber="1">
<emphasis italics="true" pageId="0" pageNumber="1">
<typeStatus>Paratype</typeStatus>
<paragraph id="FAC1CEFF4F0E639FD21BC34ECB3934BC" pageId="0" pageNumber="1">
<materialsCitation id="91A9658C04C4A2540C02C84E2C0FB4D0" collectingDate="1972-01-23" collectingDateMax="1972-01-31" collectingDateMin="1972-01-23" collectorName="H. Falke" country="Uganda" elevation="1160" location="Entebbe" specimenCount="1" specimenCount-male="1" typeStatus="Paratype">
<emphasis id="1579B3B708CC7493BBAD8BA3A1790F11" bold="true" pageId="0" pageNumber="1">
<emphasis id="63689B158CEF32E5CD29B18AB9956BD1" italics="true" pageId="0" pageNumber="1">
<typeStatus id="F2F1A94C72F0A572D0B439599A4B0543">Paratype</typeStatus>
</emphasis>
:
</emphasis>
<collectingCountry name="Uganda">Uganda</collectingCountry>
<collectingCountry id="B0F349482766C85E315749B110E1E19B" name="Uganda">Uganda</collectingCountry>
<specimenCount type="male">1♂</specimenCount>
<specimenCount id="B1CEA7505A2EF83BBB98E3771A450BE5" type="male">1♂</specimenCount>
; near
<location LSID="urn:lsid:plazi:treatment:EB0E1ADA963B5287991F97C8F5258A02:B0BE1B5905D2901E44473B098892BA74" country="Uganda" name="Entebbe">Entebbe</location>
<location id="B0BE1B5905D2901E44473B098892BA74" LSID="urn:lsid:plazi:treatment:EB0E1ADA963B5287991F97C8F5258A02:B0BE1B5905D2901E44473B098892BA74" country="Uganda" name="Entebbe">Entebbe</location>
;
<collectingDate value="1972-01-23" valueMax="1972-01-31" valueMin="1972-01-23">23-31 Jan 1972</collectingDate>
<collectingDate id="2581C56B5F9B04E5C5C1D0EDD3EEDA9C" value="1972-01-23" valueMax="1972-01-31" valueMin="1972-01-23">23-31 Jan 1972</collectingDate>
;
<quantity metricMagnitude="3" metricUnit="m" metricValue="1.16" unit="m" value="1160.0">
<elevation metricMagnitude="3" metricUnit="m" metricValue="1.16" unit="m" value="1160.0">1160 m</elevation>
<quantity id="059DA73AA2AAA934373144262A06F421" metricMagnitude="3" metricUnit="m" metricValue="1.16" unit="m" value="1160.0">
<elevation id="6782240063E95C73451D7E7FE877D815" metricMagnitude="3" metricUnit="m" metricValue="1.16" unit="m" value="1160.0">1160 m</elevation>
</quantity>
;
<collectorName>H. Falke</collectorName>
<collectorName id="CF63754630858CCF785229429B7E0514">H. Falke</collectorName>
leg.; CNC
<taxonomicName authorityName="Rondani" authorityYear="1857" kingdom="Animalia" lsidName="" order="Diptera" pageId="0" pageNumber="1" rank="order">Diptera</taxonomicName>
<taxonomicName id="77859292967A6D1B6CEB5ECA79AF7C8D" authorityName="Rondani" authorityYear="1857" class="Insecta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="order">Diptera</taxonomicName>
102306 (head and abdomen lost) [CNC]
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="description">
<paragraph pageId="0" pageNumber="1">Description male</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">
<subSubSection id="6AB76DF04F39AB64E643D7F8D255C1AE" pageId="0" pageNumber="1" type="description">
<paragraph id="2B5E2096094E41710201F1D019B659F0" pageId="0" pageNumber="1">Description male</paragraph>
<paragraph id="87ECE8844EEE079500CC96CBEE3DA51B" pageId="0" pageNumber="1">
<emphasis id="CB0A66D56906460F7459E72A7140FC67" bold="true" pageId="0" pageNumber="1">
(Fig.
<figureCitation captionStart="Figures 11, 12" captionStartId="F6" captionText="Figures 11, 12. Mesembrius spp., habitus, lateral view 11 M. ingratus (Loew) (♂) 12 M. longipilosus sp. nov. (♂)." figureDoi="10.3897/zookeys.1046.57052.figures11-12" httpUri="https://binary.pensoft.net/fig/557467" pageId="0" pageNumber="1">12</figureCitation>
<figureCitation id="64EB0EDCEAB7D9063561819A29EA2387" captionStart="Figures 11, 12" captionStartId="F6" captionText="Figures 11, 12. Mesembrius spp., habitus, lateral view 11 M. ingratus (Loew) (♂) 12 M. longipilosus sp. nov. (♂)." figureDoi="10.3897/zookeys.1046.57052.figures11-12" httpUri="https://binary.pensoft.net/fig/557467" pageId="0" pageNumber="1">12</figureCitation>
).
</emphasis>
Body length: 8.6 mm. Wing length: 7.2-7.7 mm.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Head</emphasis>
<paragraph id="F00E3B031FC2E3FF4C3C92A8F3AC5092" pageId="0" pageNumber="1">
<emphasis id="58289841A4EC1C1F1E9A072ADBB89233" bold="true" italics="true" pageId="0" pageNumber="1">Head</emphasis>
(Fig.
<figureCitation captionStart="Figures 5257" captionStartId="F25" captionText="Figures 52 - 57. Mesembrius spp., head, frontal view 52 M. copelandi sp. nov. (♂) 53 M. cyanipennis (Bezzi) (♂) 54 M. ingratus (Loew) (♂) 55 M. longipilosus sp. nov. (♂) 56 M. madagascariensis Keiser (♂) 57 M. minor (Bezzi) (♂)." figureDoi="10.3897/zookeys.1046.57052.figures52-57" httpUri="https://binary.pensoft.net/fig/557486" pageId="0" pageNumber="1">55</figureCitation>
<figureCitation id="F5AD53DD78F80EABA2227E01C400AB2B" captionStart="Figures 5257" captionStartId="F25" captionText="Figures 52 - 57. Mesembrius spp., head, frontal view 52 M. copelandi sp. nov. (♂) 53 M. cyanipennis (Bezzi) (♂) 54 M. ingratus (Loew) (♂) 55 M. longipilosus sp. nov. (♂) 56 M. madagascariensis Keiser (♂) 57 M. minor (Bezzi) (♂)." figureDoi="10.3897/zookeys.1046.57052.figures52-57" httpUri="https://binary.pensoft.net/fig/557486" pageId="0" pageNumber="1">55</figureCitation>
). Eyes bare; dichoptic, distance between eyes approx. the width of ocellus. Face yellow with dark medial vitta; white pilose; white pollinose. Vertical triangle black with yellow and black pile; yellow pollinose on lower half. Distance between lateral ocellus and eye margin approx. 1/2 width of ocellus. Frontal triangle black; white pilose; white pollinose. Frontal prominence shiny black. Occiput yellow; yellow pilose with interspersed short, black setulae; yellow and white pollinose. Antenna black; postpedicel white pollinose, antennal arista reddish-brown.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Thorax.</emphasis>
<paragraph id="D703FF8CAD402BB67AD0029FEC731661" pageId="0" pageNumber="1">
<emphasis id="D6287F47F7E4C79F62772E3F1644582C" bold="true" italics="true" pageId="0" pageNumber="1">Thorax.</emphasis>
Scutum black; white pilose, with three dorsal, well-demarcated yellow-white pollinose vitta which are connected at posterior end; with lateral, yellow-white pollinose vitta. Scutellum yellow-brown; yellow pilose.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Legs.</emphasis>
<paragraph id="79190354EEB18F565A05D31664615149" pageId="0" pageNumber="1">
<emphasis id="9F699CD22BC769E1C933D9869B648520" bold="true" italics="true" pageId="0" pageNumber="1">Legs.</emphasis>
Femora dark chocolate-brown, tibia and tarsi orange-brown. Proleg (Fig.
<figureCitation captionStart="Figures 159162" captionStartId="F47" captionText="Figures 159 - 162. Mesembrius spp., proleg, dorsal view 159 M. tarsatus (Bigot) (♂) 160 M. capensis (Macquart) (♂) 161 M. senegalensis (♂) 162 M. longipilosus sp. nov. (♂). Abbreviations: bt-basitarsus, fem-femur, tib-tibia." figureDoi="10.3897/zookeys.1046.57052.figures159-162" httpUri="https://binary.pensoft.net/fig/557507" pageId="0" pageNumber="1">162</figureCitation>
<figureCitation id="5C43AA84EBFDE122F0E5598026D0C447" captionStart="Figures 159162" captionStartId="F47" captionText="Figures 159 - 162. Mesembrius spp., proleg, dorsal view 159 M. tarsatus (Bigot) (♂) 160 M. capensis (Macquart) (♂) 161 M. senegalensis (♂) 162 M. longipilosus sp. nov. (♂). Abbreviations: bt-basitarsus, fem-femur, tib-tibia." figureDoi="10.3897/zookeys.1046.57052.figures159-162" httpUri="https://binary.pensoft.net/fig/557507" pageId="0" pageNumber="1">162</figureCitation>
): Femur without apical pile brush; yellow pile ventrally long in proximal half, shorter in distal half; ventrally 3-4 black pile at basal 1/3. Tibia yellow and black pilose. Tarsi black pilose dorsally, yellow-orange pilose ventrally. Mesoleg: Similar to proleg; with black and yellow pile on basitarsus. Metaleg: Femur with long yellow pile anteriorly and shorter pile, posteriorly; ventral pile scarce, yellow and black, the black pile is longer at proximal half than at distal half. Tibia unmodified; with long, yellowish pile and scarce black pile on distal half. Tarsi black pilose dorsally, orange pilose ventrally.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Wing</emphasis>
<paragraph id="5991F23D562820039CC41C664C917978" pageId="0" pageNumber="1">
<emphasis id="3C06B9BDF1389B59D7790AEDA41F01B8" bold="true" italics="true" pageId="0" pageNumber="1">Wing</emphasis>
(Fig.
<figureCitation captionStart="Figures 131134" captionStartId="F40" captionText="Figures 131 - 134. Mesembrius spp., right wing 131 M. copelandi sp. nov. (♂) 132 M. cyanipennis (Bezzi) (♂) 133 M. ingratus (Loew) (♂) 134 M. longipilosus sp. nov. (♂)." figureDoi="10.3897/zookeys.1046.57052.figures131-134" httpUri="https://binary.pensoft.net/fig/557501" pageId="0" pageNumber="1">134</figureCitation>
<figureCitation id="3CBCC009B7C98E300358DE50A77C9B43" captionStart="Figures 131134" captionStartId="F40" captionText="Figures 131 - 134. Mesembrius spp., right wing 131 M. copelandi sp. nov. (♂) 132 M. cyanipennis (Bezzi) (♂) 133 M. ingratus (Loew) (♂) 134 M. longipilosus sp. nov. (♂)." figureDoi="10.3897/zookeys.1046.57052.figures131-134" httpUri="https://binary.pensoft.net/fig/557501" pageId="0" pageNumber="1">134</figureCitation>
). Entire wing uniformly dense microtrichose.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Abdomen</emphasis>
<paragraph id="BC80DEC73EC7B4D4333E3561D27B0805" pageId="0" pageNumber="1">
<emphasis id="964449573F24D0ED5B7BDD9BB185C13E" bold="true" italics="true" pageId="0" pageNumber="1">Abdomen</emphasis>
(Fig.
<figureCitation captionStart="Figures 8994" captionStartId="F32" captionText="Figures 89 - 94. Mesembrius spp., abdomen, dorsal view 89 M. copelandi sp. nov. (♂) 90 M. cyanipennis (Bezzi) (♂) 91 M. ingratus (Loew) (♂) 92 M. longipilosus sp. nov. (♂) 93 M. madagascariensis Keiser (♂) 94 M. minor (Bezzi) (♂)." figureDoi="10.3897/zookeys.1046.57052.figures89-94" httpUri="https://binary.pensoft.net/fig/557493" pageId="0" pageNumber="1">92</figureCitation>
<figureCitation id="35AC0E01FCD1548B080CABB4DA6BD4EB" captionStart="Figures 8994" captionStartId="F32" captionText="Figures 89 - 94. Mesembrius spp., abdomen, dorsal view 89 M. copelandi sp. nov. (♂) 90 M. cyanipennis (Bezzi) (♂) 91 M. ingratus (Loew) (♂) 92 M. longipilosus sp. nov. (♂) 93 M. madagascariensis Keiser (♂) 94 M. minor (Bezzi) (♂)." figureDoi="10.3897/zookeys.1046.57052.figures89-94" httpUri="https://binary.pensoft.net/fig/557493" pageId="0" pageNumber="1">92</figureCitation>
). Tergite II with pair of very large, yellow to orange rounded maculae; black marking hourglass-shaped, but the posterior part is smaller compared to the anterior part; yellow pilose. Tergite III almost entirely orange with small medial black maculae; yellow pilose. Tergite IV with anterior white pollinose band; black on posterior 1/3; yellow pilose.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Genitalia</emphasis>
<paragraph id="B8189FEF5DB0FB38FF568892382424B7" pageId="0" pageNumber="1">
<emphasis id="FA2C53A6A39D14CB0AF62808D1A35B01" bold="true" italics="true" pageId="0" pageNumber="1">Genitalia</emphasis>
(Fig.
<figureCitation captionStart="Figures 205216" captionStartId="F58" captionText="Figures 205 - 216. Mesembrius spp., male genitalia, lateral view 205 M. arcuatus sp. nov. 206 M. caffer (Loew) (nominal morph) 207 M. caffer (Loew) (spined morph) 208 M. ctenifer Hull syn. nov. 209 M. capensis (Macquart) 210 M. chapini Curran 211 M. copelandi sp. nov. 212 M. cyanipennis (Bezzi) 213 M. ingratus (Loew) 214 M. longipilosus sp. nov. 215 M. madagascariensis Keiser 216 M. minor (Bezzi)." figureDoi="10.3897/zookeys.1046.57052.figures205-216" httpUri="https://binary.pensoft.net/fig/557518" pageId="0" pageNumber="1">214</figureCitation>
<figureCitation id="64C075D5580AE72D514E633A5B0DF77B" captionStart="Figures 205216" captionStartId="F58" captionText="Figures 205 - 216. Mesembrius spp., male genitalia, lateral view 205 M. arcuatus sp. nov. 206 M. caffer (Loew) (nominal morph) 207 M. caffer (Loew) (spined morph) 208 M. ctenifer Hull syn. nov. 209 M. capensis (Macquart) 210 M. chapini Curran 211 M. copelandi sp. nov. 212 M. cyanipennis (Bezzi) 213 M. ingratus (Loew) 214 M. longipilosus sp. nov. 215 M. madagascariensis Keiser 216 M. minor (Bezzi)." figureDoi="10.3897/zookeys.1046.57052.figures205-216" httpUri="https://binary.pensoft.net/fig/557518" pageId="0" pageNumber="1">214</figureCitation>
). Epandrium: Dorsal lobe of surstylus elongated, more or less rectangular with upwardly curved apex, with short, black spines in distal half; dorsolaterally with a few longer, black setulae; dorsally and laterally with long, yellow pile. Ventral lobe of surstylus with large expansion ventrally, with, on ventral side of the expansion, short black setulae.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="female">
<paragraph pageId="0" pageNumber="1">Female.</paragraph>
<paragraph pageId="0" pageNumber="1">Unknown.</paragraph>
<subSubSection id="921A2A1CDF4C411624D483D944602A9F" pageId="0" pageNumber="1" type="female">
<paragraph id="AB6E338B2B0D4CEE3EAD51DAB2AA278F" pageId="0" pageNumber="1">Female.</paragraph>
<paragraph id="72193BFDD92DE4FBE771CA47F694457B" pageId="0" pageNumber="1">Unknown.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="distribution">
<paragraph pageId="0" pageNumber="1">Distribution.</paragraph>
<paragraph pageId="0" pageNumber="1">Uganda.</paragraph>
<subSubSection id="61299E8DF406ECECF361EA3C7FCEAED9" pageId="0" pageNumber="1" type="distribution">
<paragraph id="8794E8B6E9DF38F94B4AB1A61C8044DE" pageId="0" pageNumber="1">Distribution.</paragraph>
<paragraph id="235FC991E3039A85CE8C9A5B40DCECC4" pageId="0" pageNumber="1">Uganda.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="comments">
<paragraph pageId="0" pageNumber="1">Comments.</paragraph>
<paragraph pageId="0" pageNumber="1">
<taxonomicName authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
<subSubSection id="D8B27B105E4D72ACD771330FA99303EB" pageId="0" pageNumber="1" type="comments">
<paragraph id="FE21923464450E68ED2342D458848F1A" pageId="0" pageNumber="1">Comments.</paragraph>
<paragraph id="9DA3ECBFD11B1B3578F1F732DF073873" pageId="0" pageNumber="1">
<taxonomicName id="8EA8847D52FAF45AF2FE894D644908BD" authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis id="77FD23D32E08B65DA6CB23F5258256D2" italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
</taxonomicName>
sp. nov. is a new species which is only known from two male specimens from Uganda (Entebbe). The male genitalia look similar to those of
<taxonomicName lsidName="M. capensis" pageId="0" pageNumber="1" rank="species" species="capensis">
<emphasis italics="true" pageId="0" pageNumber="1">M. capensis</emphasis>
<taxonomicName id="3B4B1A03D5E9ABABF269EF06763F3383" lsidName="M. capensis" pageId="0" pageNumber="1" rank="species" species="capensis">
<emphasis id="6BF01ACE6870CA4C960D44ACA6DCBE4B" italics="true" pageId="0" pageNumber="1">M. capensis</emphasis>
</taxonomicName>
, but the black setulae on the ventral expansion of the ventral lobe of the surstylus are fewer in number and much shorter. No DNA barcodes are available.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="etymology">
<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="1">
<subSubSection id="A78E633E5E2B479CD4839B996913BB29" pageId="0" pageNumber="1" type="etymology">
<paragraph id="A741A35F828A51DD7542E678FF4EA302" pageId="0" pageNumber="1">Etymology.</paragraph>
<paragraph id="CDBB1450717D9A9F2D6C53201189EA32" pageId="0" pageNumber="1">
The specific epithet
<taxonomicName authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
<taxonomicName id="9AD894F8119A3A71C4116B61902A04DC" authorityName="Jordaens, Goergen &amp; De Meyer" authorityYear="2021" class="Insecta" family="Syrphidae" genus="Mesembrius" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mesembrius longipilosus" order="Diptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="longipilosus">
<emphasis id="AB4E166B37FE2ECBA7E4C3163C905A7D" italics="true" pageId="0" pageNumber="1">Mesembrius longipilosus</emphasis>
</taxonomicName>
(Latin for hairy, covered with long pili) refers to the long, thin yellow pile on the metalegs. It is to be treated as an adjective (nominative singular masculine).
</paragraph>