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<document id="B531EAF208F4F82E51693E1168838859" ID-DOI="10.5852/ejt.2016.238" ID-GBIF-Dataset="8b57d1e6-b2b7-4229-912a-c042457efaaf" ID-ISSN="2118-9773" ID-Zenodo-Dep="3849874" 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="1590439951474" checkinUser="valdenar" docAuthor="Doczkal, Dieter, Radenković, Snežana, Lyneborg, Leif &amp; Pape, Thomas" docDate="2016" docId="03EA327EFFEBEC1DFD2FEB7AFD92FAE6" docLanguage="en" docName="ejt-2016-238.pdf.imf" docOrigin="European Journal of Taxonomy 238" docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.14:EJT.2018-.journal_article.type1" docStyleId="EF2B578F1D15862ADE45B0C07C620911" docStyleName="EJT.2018-.journal_article.type1" docStyleVersion="14" docTitle="Megatrigon argenteus Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape 2016" docType="treatment" docVersion="2" lastPageNumber="11" masterDocId="FFD34A06FFE1EC17FF9AEA71FFC7FFFF" masterDocTitle="Taxonomic revision of the Afrotropical genus Megatrigon Johnson, 1898 (Diptera: Syrphidae)" masterLastPageNumber="36" masterPageNumber="1" pageNumber="11" updateTime="1734461804313" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-3.0" zenodo-license-figures="CC-BY-3.0" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="D7782D942BDBE8F5013A75D143177633">Taxonomic revision of the Afrotropical genus Megatrigon Johnson, 1898 (Diptera: Syrphidae)</mods:title>
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<mods:namePart id="3F26BC83A1A997B52CB6EBBD33984EF5">Doczkal, Dieter</mods:namePart>
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<mods:namePart id="7E7C0497C40E842BD175B8502E699F23">Radenković, Snežana</mods:namePart>
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<mods:affiliation id="7D5F0110B1CB672F42736CA4B5A38324">University of Novi Sad, Department of Biology and Ecology, Trg Dositeja Obradovica 2, 21000 Novi Sad, Serbia.</mods:affiliation>
<mods:nameIdentifier id="E6BC6BEBDA9E861D04170EA44E0A514D" type="email">snezana.radenkovic@dbe.uns.ac.rs</mods:nameIdentifier>
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<mods:namePart id="88D8F6F1953B0756D987981237E05D3E">Lyneborg, Leif</mods:namePart>
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<mods:namePart id="B6B6F78BF644FA815299F715D44C4FA6">Pape, Thomas</mods:namePart>
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<mods:affiliation id="AD39D323AD6C872FDA314A7C3A3E640E">Natural History Museum of Denmark, Universitetsparken 15, 2100 Copenhagen, Denmark.</mods:affiliation>
<mods:nameIdentifier id="064E3DF9E258D6BE11761D575CC6B930" type="email">tpape@snm.ku.dk&amp;tpape@snm.ku.dk</mods:nameIdentifier>
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<treatment id="03EA327EFFEBEC1DFD2FEB7AFD92FAE6" ID-DOI="http://doi.org/10.5281/zenodo.3854670" ID-GBIF-Taxon="164283059" ID-Zenodo-Dep="3854670" LSID="urn:lsid:plazi:treatment:03EA327EFFEBEC1DFD2FEB7AFD92FAE6" httpUri="http://treatment.plazi.org/id/03EA327EFFEBEC1DFD2FEB7AFD92FAE6" lastPageNumber="11" pageId="10" pageNumber="11" scope_class="Insecta" scope_family="Syrphidae" scope_order="Diptera" scope_subFamily="Eristalinae" scope_tribe="Merodontini">
<subSubSection id="C359D0E3FFEBEC1DFD2FEB7AFCB9FEDA" box="[693,894,267,293]" pageId="10" pageNumber="11" type="nomenclature">
<paragraph id="8BFC8368FFEBEC1DFD2FEB7AFCB9FEDA" blockId="10.[693,894,267,293]" box="[693,894,267,293]" pageId="10" pageNumber="11">
<emphasis id="B9375F7AFFEBEC1DFD2FEB7AFCB9FEDA" bold="true" box="[693,894,267,293]" pageId="10" pageNumber="11">
<taxonomicName id="4C43F8EBFFEBEC1DFD2FEB7AFCEBFEDA" authority="(Walker, 1852)" authorityName="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape" authorityYear="2016" baseAuthorityName="Walker" baseAuthorityYear="1852" box="[693,812,267,293]" class="Insecta" family="Syrphidae" genus="Megatrigon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="10" pageNumber="11" phylum="Arthropoda" rank="species" species="argenteus" status="comb. nov.">
<emphasis id="B9375F7AFFEBEC1DFD2FEB7AFCEBFEDA" bold="true" box="[693,812,267,293]" italics="true" pageId="10" pageNumber="11">argenteus</emphasis>
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group
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<subSubSection id="C359D0E3FFEBEC1DFF27EB3DFD92FAE6" pageId="10" pageNumber="11" type="diagnosis">
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<emphasis id="B9375F7AFFEBEC1DFF27EB3DFEF1FE99" bold="true" box="[189,310,332,358]" pageId="10" pageNumber="11">Diagnosis</emphasis>
</heading>
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<paragraph id="8BFC8368FFEBEC1DFF27EB0AFAE4FDDD" blockId="10.[189,1399,379,546]" pageId="10" pageNumber="11">
Katepisternum with a posterodorsal and a weak (composed of a few setae only) posteroventral pile patch, without setae between them. The bare flat posterior margin of tergite 1 (almost) entirely without microtrichia. Base of wing entirely microtrichiose or at most with small bare areas in cells br, bm, or cup. Anepisternal setae saw-like. Protarsomere 1 anterodorsally with a line of minute black spinules (yellow in
<taxonomicName id="4C43F8EBFFEBEC1DFEA6E878FDE8FDDD" authority="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape, 2016" authorityName="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape" authorityYear="2016" box="[316,559,520,546]" class="Insecta" family="Syrphidae" genus="Megatrigon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="10" pageNumber="11" phylum="Arthropoda" rank="species" species="argentimaculatus" status="sp. nov.">
<emphasis id="B9375F7AFFEBEC1DFEA6E878FDE8FDDD" box="[316,559,520,546]" italics="true" pageId="10" pageNumber="11">M. argentimaculatus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A204E201FFEBEC1DFDADE879FD56FDDD" box="[567,657,520,546]" pageId="10" pageNumber="11" rank="species">sp. nov.</taxonomicNameLabel>
and
<taxonomicName id="4C43F8EBFFEBEC1DFD50E878FCB5FDDD" authority="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape, 2016" authorityName="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape" authorityYear="2016" box="[714,882,520,546]" class="Insecta" family="Syrphidae" genus="Megatrigon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="10" pageNumber="11" phylum="Arthropoda" rank="species" species="tabanoides" status="sp. nov.">
<emphasis id="B9375F7AFFEBEC1DFD50E878FCB5FDDD" box="[714,882,520,546]" italics="true" pageId="10" pageNumber="11">M. tabanoides</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A204E201FFEBEC1DFCE3E879FC12FDDD" box="[889,981,520,546]" pageId="10" pageNumber="11" rank="species">sp. nov.</taxonomicNameLabel>
) between the yellow trichia.
</paragraph>
<paragraph id="8BFC8368FFEBEC1DFF27E836FE21FBF6" blockId="10.[189,1399,583,1034]" pageId="10" pageNumber="11">
♂: sternite 4 with flat caudal lobes, entirely microtrichiose. Genital pouch less than half as wide as abdominal segment 4 at anterior margin. Posterior surstyle lobe directed medially, its apex forming a strong twisted hook (
<figureCitation id="13789FEDFFEBEC1DFE23E8FEFDE3FD55" box="[441,548,655,682]" captionStart="Fig" captionStartId="30.[189,232,1894,1920]" captionTargetBox="[189,1398,875,1852]" captionTargetId="figure@30.[189,1398,875,1852]" captionTargetPageId="30" captionText="Fig. 13. Megatrigon spp., ♂ genitalia, lateral (A, F) and ventral (BE, G) view (SEM). AC. Megatrigon argenteus (Walker, 1852) comb. nov. D. M. magnicornis sp. nov. E. M. jacobi (Hervé-Bazin, 1913) comb. nov. FG. Megatrigon sp. from the sexfasciatus group. Symbols: w = median surstyle; x = inner accessory lobe of median surstyle; y = posterior surstyle; z = subepandrial sclerite." figureDoi="http://doi.org/10.5281/zenodo.3849926" httpUri="https://zenodo.org/record/3849926/files/figure.png" pageId="10" pageNumber="11">Fig. 13A</figureCitation>
:y). Median surstyle lobe setose along ventral margin on full length, on median surface extensively covered by microtrichia and posteriorly with a small inner accessory lobe pointing medially (
<figureCitation id="13789FEDFFEBEC1DFE39E8A7FDC8FD0F" box="[419,527,726,752]" captionStart="Fig" captionStartId="30.[189,232,1894,1920]" captionTargetBox="[189,1398,875,1852]" captionTargetId="figure@30.[189,1398,875,1852]" captionTargetPageId="30" captionText="Fig. 13. Megatrigon spp., ♂ genitalia, lateral (A, F) and ventral (BE, G) view (SEM). AC. Megatrigon argenteus (Walker, 1852) comb. nov. D. M. magnicornis sp. nov. E. M. jacobi (Hervé-Bazin, 1913) comb. nov. FG. Megatrigon sp. from the sexfasciatus group. Symbols: w = median surstyle; x = inner accessory lobe of median surstyle; y = posterior surstyle; z = subepandrial sclerite." figureDoi="http://doi.org/10.5281/zenodo.3849926" httpUri="https://zenodo.org/record/3849926/files/figure.png" pageId="10" pageNumber="11">Fig. 13D</figureCitation>
:x). Cerci (
<figureCitation id="13789FEDFFEBEC1DFD0EE8A7FD29FD0F" box="[660,750,726,752]" captionStart="Fig" captionStartId="16.[189,232,1825,1851]" captionTargetBox="[216,1374,263,1796]" captionTargetId="figure@16.[216,1374,263,1796]" captionTargetPageId="16" captionText="Fig. 10. Megatrigon spp., ♂ terminalia, epandrium, left lateral view. A. Megatrigon argenteus (Walker, 1852) comb. nov. B. M. argentifrons sp. nov. C. M. argentimaculatus sp. nov. D. M. magnicornis sp. nov. E. M. natalensis sp. nov. F. M. sexmaculatus sp. nov. G. M. apiformis sp. nov. H. M. cooksoni sp. nov. I. M. immaculatus sp. nov. J. M. ochreatus (Hull, 1964) comb. nov. K. M. tabanoides sp. nov. L. Megatrigon sp. from sexfasciatus group. M. M. nivalis. Symbols: x = ventral margin of median surstyle; y = posterior surstyle; z = cercus; w = subepandrial sclerite." figureDoi="http://doi.org/10.5281/zenodo.3849914" httpUri="https://zenodo.org/record/3849914/files/figure.png" pageId="10" pageNumber="11">Fig. 10</figureCitation>
:z) with blunt apex, ventral surface membraneous and without setae. Subepandrial sclerite strongly curved (in lateral view,
<figureCitation id="13789FEDFFEBEC1DFC67E888FB91FCEC" box="[1021,1110,761,787]" captionStart="Fig" captionStartId="16.[189,232,1825,1851]" captionTargetBox="[216,1374,263,1796]" captionTargetId="figure@16.[216,1374,263,1796]" captionTargetPageId="16" captionText="Fig. 10. Megatrigon spp., ♂ terminalia, epandrium, left lateral view. A. Megatrigon argenteus (Walker, 1852) comb. nov. B. M. argentifrons sp. nov. C. M. argentimaculatus sp. nov. D. M. magnicornis sp. nov. E. M. natalensis sp. nov. F. M. sexmaculatus sp. nov. G. M. apiformis sp. nov. H. M. cooksoni sp. nov. I. M. immaculatus sp. nov. J. M. ochreatus (Hull, 1964) comb. nov. K. M. tabanoides sp. nov. L. Megatrigon sp. from sexfasciatus group. M. M. nivalis. Symbols: x = ventral margin of median surstyle; y = posterior surstyle; z = cercus; w = subepandrial sclerite." figureDoi="http://doi.org/10.5281/zenodo.3849914" httpUri="https://zenodo.org/record/3849914/files/figure.png" pageId="10" pageNumber="11">Fig. 10</figureCitation>
:w), and its anterior end sclerotized at the sides only, sclerotized but translucent in the middle, posterior part with a strongly trichiose pillow-like structure, which is densely furnished by unusually long and thick microtrichia (
<figureCitation id="13789FEDFFEBEC1DFF5CE912FE90FC82" box="[198,343,867,893]" captionStart="Fig" captionStartId="30.[189,232,1894,1920]" captionTargetBox="[189,1398,875,1852]" captionTargetId="figure@30.[189,1398,875,1852]" captionTargetPageId="30" captionText="Fig. 13. Megatrigon spp., ♂ genitalia, lateral (A, F) and ventral (BE, G) view (SEM). AC. Megatrigon argenteus (Walker, 1852) comb. nov. D. M. magnicornis sp. nov. E. M. jacobi (Hervé-Bazin, 1913) comb. nov. FG. Megatrigon sp. from the sexfasciatus group. Symbols: w = median surstyle; x = inner accessory lobe of median surstyle; y = posterior surstyle; z = subepandrial sclerite." figureDoi="http://doi.org/10.5281/zenodo.3849926" httpUri="https://zenodo.org/record/3849926/files/figure.png" pageId="10" pageNumber="11">Fig. 13C, D</figureCitation>
:z), otherwise bare. Hypandrium (
<figureCitation id="13789FEDFFEBEC1DFD6AE912FC8CFC82" box="[752,843,867,893]" captionStart="Fig" captionStartId="18.[189,232,1794,1820]" captionTargetBox="[189,1399,442,1753]" captionTargetId="figure@18.[189,1399,442,1753]" captionTargetPageId="18" captionText="Fig. 12. Megatrigon spp., ♂ terminalia, hypandrium, ventral view. A. Megatrigon argenteus (Walker, 1852) comb. nov. B. M. argentifrons sp. nov. C. M. argentimaculatus sp. nov. D. M. magnicornis sp. nov. E. M. natalensis sp. nov. F. M. apiformis sp. nov. G. M. cooksoni sp. nov. H. M. immaculatus sp. nov. I. M. ochreatus (Hull, 1964) comb. nov. J. M. tabanoides sp. nov. K. Megatrigon sp. from the sexfasciatus group. L. M. nivalis (Hull, 1964) comb. nov. Symbol: x = lateral shoulders." figureDoi="http://doi.org/10.5281/zenodo.3849922" httpUri="https://zenodo.org/record/3849922/files/figure.png" pageId="10" pageNumber="11">Fig. 12</figureCitation>
:AJ) with a moderately wide base (in ventral view), without shoulders between wide base and narrower distal half, apex distinctly produced beyond ctenidium and pointed. Ejaculatory apodeme small. The male terminalia of all included species are very similar (
<figureCitation id="13789FEDFFEBEC1DFEBBE9BDFE6BFC19" box="[289,428,972,998]" captionStart-0="Fig" captionStart-1="Fig" captionStart-2="Fig" captionStartId-0="16.[189,232,1825,1851]" captionStartId-1="17.[189,232,1758,1784]" captionStartId-2="18.[189,232,1794,1820]" captionTargetBox-0="[216,1374,263,1796]" captionTargetBox-1="[189,1399,340,1716]" captionTargetBox-2="[189,1399,442,1753]" captionTargetId-0="figure@16.[216,1374,263,1796]" captionTargetId-1="figure@17.[189,1399,340,1716]" captionTargetId-2="figure@18.[189,1399,442,1753]" captionTargetPageId-0="16" captionTargetPageId-1="17" captionTargetPageId-2="18" captionText-0="Fig. 10. Megatrigon spp., ♂ terminalia, epandrium, left lateral view. A. Megatrigon argenteus (Walker, 1852) comb. nov. B. M. argentifrons sp. nov. C. M. argentimaculatus sp. nov. D. M. magnicornis sp. nov. E. M. natalensis sp. nov. F. M. sexmaculatus sp. nov. G. M. apiformis sp. nov. H. M. cooksoni sp. nov. I. M. immaculatus sp. nov. J. M. ochreatus (Hull, 1964) comb. nov. K. M. tabanoides sp. nov. L. Megatrigon sp. from sexfasciatus group. M. M. nivalis. Symbols: x = ventral margin of median surstyle; y = posterior surstyle; z = cercus; w = subepandrial sclerite." captionText-1="Fig. 11. Megatrigon spp., ♂ terminalia, hypandrium (AM) and phallus (N), left lateral view. A. Megatrigon argenteus (Walker, 1852) comb. nov. B. M. argentifrons sp. nov. C. M. argentimaculatus sp. nov. D. M. magnicornis sp. nov. E. M. natalensis sp. nov. F. M. sexmaculatus sp. nov. G. M. apiformis sp. nov. H. M. cooksoni sp. nov. I. M. immaculatus sp. nov. J. M. ochreatus (Hull, 1964) comb. nov. K. M. tabanoides sp. nov. L. M. sp. from sexfasciatus group. MN. M. nivalis (Hull, 1964) comb. nov. Symbol: x = hamus." captionText-2="Fig. 12. Megatrigon spp., ♂ terminalia, hypandrium, ventral view. A. Megatrigon argenteus (Walker, 1852) comb. nov. B. M. argentifrons sp. nov. C. M. argentimaculatus sp. nov. D. M. magnicornis sp. nov. E. M. natalensis sp. nov. F. M. apiformis sp. nov. G. M. cooksoni sp. nov. H. M. immaculatus sp. nov. I. M. ochreatus (Hull, 1964) comb. nov. J. M. tabanoides sp. nov. K. Megatrigon sp. from the sexfasciatus group. L. M. nivalis (Hull, 1964) comb. nov. Symbol: x = lateral shoulders." figureDoi-0="http://doi.org/10.5281/zenodo.3849914" figureDoi-1="http://doi.org/10.5281/zenodo.3849918" figureDoi-2="http://doi.org/10.5281/zenodo.3849922" httpUri-0="https://zenodo.org/record/3849914/files/figure.png" httpUri-1="https://zenodo.org/record/3849918/files/figure.png" httpUri-2="https://zenodo.org/record/3849922/files/figure.png" pageId="10" pageNumber="11">Figs 1012</figureCitation>
), the significance of the observed small differences between species needs to be proved by more material.
</paragraph>
<paragraph id="8BFC8368FFEBEC1DFF27EE40FEC6FB91" blockId="10.[189,1399,1073,1134]" pageId="10" pageNumber="11">
<specimenCount id="9D4548E1FFEBEC1DFF27EE40FF12FBB4" box="[189,213,1073,1099]" pageId="10" pageNumber="11" type="female"></specimenCount>
: tergite 5 and sternite 5 with posteriorly directed setae, ovipositor with moderately thick setae, without tooth.
</paragraph>
<paragraph id="8BFC8368FFEBEC1DFF27EEE4FD92FAE6" blockId="10.[189,1399,1173,1306]" pageId="10" pageNumber="11">
The
<taxonomicName id="4C43F8EBFFEBEC1DFF68EEE7FEA2FB50" authorityName="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape" authorityYear="2016" baseAuthorityName="Walker" baseAuthorityYear="1852" box="[242,357,1174,1199]" class="Insecta" family="Syrphidae" genus="Megatrigon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="10" pageNumber="11" phylum="Arthropoda" rank="species" species="argenteus">
<emphasis id="B9375F7AFFEBEC1DFF68EEE7FEA2FB50" box="[242,357,1174,1199]" italics="true" pageId="10" pageNumber="11">argenteus</emphasis>
</taxonomicName>
group can be subdivided into two subgroups, at least the first being monophyletic. A full description is given for
<taxonomicName id="4C43F8EBFFEBEC1DFE48EECBFDABFB2C" authorityName="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape" authorityYear="2016" baseAuthorityName="Walker" baseAuthorityYear="1852" box="[466,620,1210,1235]" class="Insecta" family="Syrphidae" genus="Megatrigon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="10" pageNumber="11" phylum="Arthropoda" rank="species" species="argenteus" status="comb. nov.">
<emphasis id="B9375F7AFFEBEC1DFE48EECBFDABFB2C" box="[466,620,1210,1235]" italics="true" pageId="10" pageNumber="11">M. argenteus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A204E201FFEBEC1DFDE9EEC8FD30FB2C" box="[627,759,1209,1235]" pageId="10" pageNumber="11" rank="species">comb. nov.</taxonomicNameLabel>
, which is the only fairly common species of this group (all others being rare or known from singletons only). The descriptions of the remaining species focus on the differences to
<emphasis id="B9375F7AFFEBEC1DFE2EEF71FD92FAE6" box="[436,597,1280,1305]" italics="true" pageId="10" pageNumber="11">
<taxonomicName id="4C43F8EBFFEBEC1DFE2EEF71FD96FAE6" authorityName="Doczkal &amp; Radenković &amp; Lyneborg &amp; Pape" authorityYear="2016" baseAuthorityName="Walker" baseAuthorityYear="1852" box="[436,593,1280,1305]" class="Insecta" family="Syrphidae" genus="Megatrigon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="10" pageNumber="11" phylum="Arthropoda" rank="species" species="argenteus">M. argenteus</taxonomicName>
.
</emphasis>
</paragraph>
</subSubSection>
</treatment>
</document>