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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.288.4095" ID-GBIF-Dataset="43b6b64a-b86b-4c0b-afcc-229ccecb6e16" ID-PMC="PMC3690914" ID-Pensoft-Pub="1313-2970-288-1" ID-PubMed="23798897" ModsDocAuthor="" ModsDocDate="2013" ModsDocID="1313-2970-288-1" ModsDocOrigin="ZooKeys 288" ModsDocTitle="Generic revision and species classification of the Microdontinae (Diptera, Syrphidae)" checkinTime="1451247431953" checkinUser="pensoft" docAuthor="Reemer, Menno &amp; Stahls, Gunilla" docDate="2013" docId="624815B9D78BCC4F4B137546D3F422A9" docLanguage="en" docName="ZooKeys 288: 1-213" docOrigin="ZooKeys 288" docSource="http://dx.doi.org/10.3897/zookeys.288.4095" docTitle="Masarygus Brethes" docType="treatment" docVersion="3" lastPageNumber="36" masterDocId="582E2572FFD0FFB3884E8864FFF1A15A" masterDocTitle="Generic revision and species classification of the Microdontinae (Diptera, Syrphidae)" masterLastPageNumber="213" masterPageNumber="1" pageNumber="34" updateTime="1668155636847" updateUser="ExternalLinkService">
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<mods:titleInfo>
<mods:title>Generic revision and species classification of the Microdontinae (Diptera, Syrphidae)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Reemer, Menno</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Stahls, Gunilla</mods:namePart>
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<mods:title>ZooKeys</mods:title>
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<mods:date>2013</mods:date>
<mods:detail type="volume">
<mods:number>288</mods:number>
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<mods:start>1</mods:start>
<mods:end>213</mods:end>
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<mods:url>http://dx.doi.org/10.3897/zookeys.288.4095</mods:url>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.288.4095</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-288-1</mods:identifier>
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<treatment ID-GBIF-Taxon="152042648" LSID="urn:lsid:plazi:treatment:624815B9D78BCC4F4B137546D3F422A9" httpUri="http://treatment.plazi.org/id/624815B9D78BCC4F4B137546D3F422A9" lastPageId="35" lastPageNumber="36" pageId="33" pageNumber="34">
<subSubSection pageId="33" pageNumber="34" type="nomenclature">
<paragraph pageId="33" pageNumber="34">
<taxonomicName LSID="http://species-id.net/wiki/Masarygus" authority="Brethes" class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="33" pageNumber="34" phylum="Arthropoda" rank="genus">
Masarygus
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
</taxonomicName>
Figs 136-150
</paragraph>
</subSubSection>
<subSubSection pageId="33" pageNumber="34" type="reference_group">
<paragraph pageId="33" pageNumber="34">
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="33" pageNumber="34" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
, 1909: 441. Type species:
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus planifrons" order="Diptera" pageId="33" pageNumber="34" phylum="Arthropoda" rank="species" species="planifrons">Masarygus planifrons</taxonomicName>
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
, 1909: 442, by original designation.
</paragraph>
</subSubSection>
<subSubSection lastPageId="34" lastPageNumber="35" pageId="33" pageNumber="34" type="description">
<paragraph pageId="33" pageNumber="34">Description.</paragraph>
<paragraph lastPageId="34" lastPageNumber="35" pageId="33" pageNumber="34">
Body length: 4-7 mm. Small, delicate flies with long antennae and flat abdomen. Head slightly to much wider than thorax. Face concave, either entirely or only laterally; wider than an eye. Mouth parts undeveloped: oral opening absent or hardly visible. Vertex more or less flat, not strongly produced or convex. Occiput ventrally narrow or widened, dorsally widened. Eye bare. Eyes in male not converging at level of frons, with mutual distance about 4 times the width of antennal fossa. Antennal fossa about as wide as high or about 1.5 times as wide as high. Antenna as long as or longer than distance between antennal fossa and anterior oral margin; basoflagellomere longer than scape, multifurcate in male (3 to 14 branches), unfurcate in female; bare; arista absent in male, present in female. Postpronotum bare. Scutellum semicircular; without calcars. Anepisternum convex; entirely with sparse, bristle-like pile. Anepimeron bare or pilose. Katepimeron convex; bare; with or without wrinkled
<pageBreakToken pageId="34" pageNumber="35" start="start">texture</pageBreakToken>
. Wing: vein R4+5 without posterior appendix; vein M1 perpendicular to vein R4+5; postero-apical corner of cell r4+5 widely rounded or rectangular, with or without small appendix; crossvein r-m located very close to base of cell dm (within basal 1/10). Abdomen dorsoventrally flattened; more or less trapezoid, with lateral margins gradually widening posteriad, with largest width at tergite 4; 1.5-2.5 times as long as wide. Tergites 3 and 4 fused. Male genitalia: phallus furcate near apex, straight, projecting not or hardly beyond apex of hypandrium; epandrium without ventrolateral ridge; surstylus unfurcate, more or less oval.
</paragraph>
</subSubSection>
<subSubSection pageId="34" pageNumber="35" type="diagnosis">
<paragraph pageId="34" pageNumber="35">Diagnosis.</paragraph>
<paragraph pageId="34" pageNumber="35">Vein R4+5 without posterior appendix. Postpronotum bare. Antenna at least as long as distance between antennal fossa and anterior oral margin. Antenna inserted on head above dorsal eye margin.</paragraph>
</subSubSection>
<subSubSection lastPageId="35" lastPageNumber="36" pageId="34" pageNumber="35" type="discussion">
<paragraph pageId="34" pageNumber="35">Discussion.</paragraph>
<paragraph pageId="34" pageNumber="35">
Originally, this genus was erected as the first known member of a new family, the
<taxonomicName family="Masarygidae" lsidName="" pageId="34" pageNumber="35" rank="family">Masarygidae</taxonomicName>
(
<bibRefCitation pageId="34" pageNumber="35">
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
1908
</bibRefCitation>
; but journal publication was 1909, see
<bibRefCitation author="Sabrosky, CW" journalOrPublisher="Myia" pageId="85" pageNumber="86" pagination="1 - 576" title="Family-group names in Diptera." volume="10" year="1999">Sabrosky 1999</bibRefCitation>
).
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
associated it with
<taxonomicName family="Conopidae" lsidName="" pageId="34" pageNumber="35" rank="family">Conopidae</taxonomicName>
and
<taxonomicName family="Scenopinidae" lsidName="" pageId="34" pageNumber="35" rank="family">Scenopinidae</taxonomicName>
because of the wing venation, and with
<taxonomicName family="Oestridae" lsidName="" pageId="34" pageNumber="35" rank="family">Oestridae</taxonomicName>
because of the reduced mouthparts. He also noted a superficial resemblance to certain
<taxonomicName family="Stratiomyidae" lsidName="" pageId="34" pageNumber="35" rank="family">Stratiomyidae</taxonomicName>
.
<bibRefCitation author="Bezzi, M" journalOrPublisher="Societas Entomologica" pageId="82" pageNumber="83" pagination="65 - 67" title="Zur Synonymie und systematischen Stellung einiger Dipteren." volume="25" year="1910">Bezzi (1910)</bibRefCitation>
was the first to recognize
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
as belonging to the
<taxonomicName family="Syrphidae" lsidName="" pageId="34" pageNumber="35" rank="family">Syrphidae</taxonomicName>
and related to
<taxonomicName class="Insecta" family="Syrphidae" genus="Microdon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microdon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Microdon</taxonomicName>
, by pointing out its resemblance to
<taxonomicName class="Insecta" family="Syrphidae" genus="Ceratophya" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Ceratophya" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Ceratophya</taxonomicName>
and the apparent relationship with ants (as noted by
<bibRefCitation pageId="34" pageNumber="35">
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
1908
</bibRefCitation>
).
<bibRefCitation author="Shannon, RC" journalOrPublisher="Proceedings of the National Academy of Sciences" pageId="85" pageNumber="86" pagination="211 - 213" title="An extraordinary adult myrmecophile from Panama." volume="10" year="1925">Shannon (1925)</bibRefCitation>
considered
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
as a synonym of
<taxonomicName class="Insecta" family="Syrphidae" genus="Microdon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microdon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Microdon</taxonomicName>
.
<bibRefCitation author="Brethes, J" journalOrPublisher="Revista de la Sociedad Entomologica Argentina" pageId="82" pageNumber="83" pagination="73 - 74" title="A proposito de Masarygus Brethes y de Sarcophaga Caridei Brethes." volume="7" year="1928">
<normalizedToken originalValue="Brèthes">Brethes</normalizedToken>
(1928)
</bibRefCitation>
objected by pointing out that
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
differs from
<taxonomicName class="Insecta" family="Syrphidae" genus="Microdon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microdon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Microdon</taxonomicName>
in the distinct sexual dimorphism and also in wing venation. All subsequent authors have included
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
in the
<taxonomicName lsidName="" pageId="34" pageNumber="35" rank="subFamily" subFamily="Microdontinae">Microdontinae</taxonomicName>
.
</paragraph>
<paragraph pageId="34" pageNumber="35">
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
was the first described syrphid taxon with a furcate basoflagellomere (in the male sex only). A few other taxa with this character were described during the 20th century:
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
Carrera, Lopes &amp; Lane, 1947,
<taxonomicName class="Insecta" family="Syrphidae" genus="Johnsoniodon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Johnsoniodon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Johnsoniodon</taxonomicName>
Curran, 1947 and
<taxonomicName class="Insecta" family="Syrphidae" genus="Carreramyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Carreramyia" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Carreramyia</taxonomicName>
Doesburg, 1966.
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
,
<taxonomicName genus="Schizoceratromyia" lsidName="Schizoceratromyia" pageId="34" pageNumber="35" rank="genus">Schizoceratromyia</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Johnsoniodon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Johnsoniodon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Johnsoniodon</taxonomicName>
were considered synonymous by
<bibRefCitation author="Hull, FM" journalOrPublisher="Transactions of the Zoological Society" pageId="84" pageNumber="85" pagination="257 - 408" title="The morphology and inter-relationships of the genera of syrphid flies, recent and fossil." url="10.1111/j.1096-3642.1949.tb00224.x" volume="26" year="1949">Hull (1949)</bibRefCitation>
, who also regarded &quot;
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
as a
<taxonomicName class="Insecta" family="Syrphidae" genus="Rhoga" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Rhoga" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Rhoga</taxonomicName>
with fissicorn antennae&quot;, without explicitly including all of these taxa in
<taxonomicName class="Insecta" family="Syrphidae" genus="Rhoga" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Rhoga" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Rhoga</taxonomicName>
(the oldest name).
<bibRefCitation author="Papavero, N" journalOrPublisher="Papeis Avulsos do Departamento de Zoologia" pageId="85" pageNumber="86" pagination="317 - 326" title="Quatro novas especies de Microdontinae do Brasil (Diptera, Syrphidae)." volume="15" year="1962">Papavero (1962)</bibRefCitation>
also considered
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
,
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Johnsoniodon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Johnsoniodon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Johnsoniodon</taxonomicName>
synonymous, because he found that the number of branches on the basoflagellomere (four in
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus planifrons" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="species" species="planifrons">Masarygus planifrons</taxonomicName>
, two in the other taxa) was a species-level character rather than a generic character.
<bibRefCitation author="van Doesburg, Sr PH" journalOrPublisher="Studies on the Fauna of Suriname and other Guyanas" pageId="87" pageNumber="88" pagination="61 - 107" title="Syrphidae from Suriname. Additional records and descriptions." volume="9" year="1966">Van Doesburg (1966)</bibRefCitation>
did not agree and considered
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
(including
<taxonomicName class="Insecta" family="Syrphidae" genus="Johnsoniodon" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Johnsoniodon" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Johnsoniodon</taxonomicName>
) as distinct genera, because of distinct differences in shape of head, antenna and abdomen.
<bibRefCitation author="Thompson, FC" journalOrPublisher="A catalogue of the Diptera of the Americas south of the United States" pageId="87" pageNumber="88" pagination="1 - 195" title="Family Syrphidae." volume="46" year="1976">Thompson et al. (1976)</bibRefCitation>
followed the opinion of
<bibRefCitation author="Papavero, N" journalOrPublisher="Papeis Avulsos do Departamento de Zoologia" pageId="85" pageNumber="86" pagination="317 - 326" title="Quatro novas especies de Microdontinae do Brasil (Diptera, Syrphidae)." volume="15" year="1962">Papavero (1962)</bibRefCitation>
.
<bibRefCitation author="Cheng, X-Y" journalOrPublisher="Zootaxa" pageId="82" pageNumber="83" pagination="21 - 48" title="A generic conspectus of the Microdontinae (Diptera: Syrphidae) with the description of two new genera from Africa and China." volume="1879" year="2008">Cheng and Thompson (2008)</bibRefCitation>
considered
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
as distinct groups.
</paragraph>
<paragraph pageId="34" pageNumber="35">
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus palmipalpus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="species" species="palmipalpus">Masarygus palmipalpus</taxonomicName>
sp. n. is considered related to
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus planifrons" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="species" species="planifrons">Masarygus planifrons</taxonomicName>
because of the following shared characters: male basoflagellomere multifurcate; base of antenna in lateral view placed above dorsal eye margin; head strongly flattened; face concave; oral opening absent; abdomen dorsoventrally flattened; gradually widening hindward, with widest point at tergite 4; phallus furcate near apex, with both processes equally long.
</paragraph>
<paragraph lastPageId="35" lastPageNumber="36" pageId="34" pageNumber="35">
In addition to
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus planifrons" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="species" species="planifrons">Masarygus planifrons</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus palmipalpus" order="Diptera" pageId="34" pageNumber="35" phylum="Arthropoda" rank="species" species="palmipalpus">Masarygus palmipalpus</taxonomicName>
, two undescribed species are considered to belong to this genus. These species are included in the phylogenetic
<pageBreakToken pageId="35" pageNumber="36" start="start">analyses</pageBreakToken>
of
<bibRefCitation pageId="35" pageNumber="36">
Reemer and
<normalizedToken originalValue="Ståhls">Stahls</normalizedToken>
(in press)
</bibRefCitation>
under the names
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
sp. 1 and sp. 2. The latter has three branches on the basoflagellomere, the first approximately 14. Whereas sp. 1 is placed in the same clade as
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus planifrons" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="species" species="planifrons">Masarygus planifrons</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus palmipalpus" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="species" species="palmipalpus">Masarygus palmipalpus</taxonomicName>
by
<bibRefCitation pageId="35" pageNumber="36">
Reemer and
<normalizedToken originalValue="Ståhls">Stahls</normalizedToken>
(in press)
</bibRefCitation>
(based on adult morphology), sp. 2 is placed in the clade containing
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
and
<taxonomicName class="Insecta" family="Syrphidae" genus="Carreramyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Carreramyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Carreramyia</taxonomicName>
. Species 2 is nevertheless included in
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
, because of the following characters: basoflagellomere multifurcate and bare (instead of bifurcate and pilose as in
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
); arista absent (present in
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
); base of antenna inserted on head above dorsal eye margin (not below as in
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
); vertex not strongly produced (in contrast with
<taxonomicName class="Insecta" family="Syrphidae" genus="Carreramyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Carreramyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Carreramyia</taxonomicName>
); crossvein r-m located within basal 1/10 of cell dm (between basal 1/4 and 1/8 in
<taxonomicName class="Insecta" family="Syrphidae" genus="Schizoceratomyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Schizoceratomyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Schizoceratomyia</taxonomicName>
); hind tibia not swollen and without long, brush-like pile (in contrast with
<taxonomicName class="Insecta" family="Syrphidae" genus="Carreramyia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Carreramyia" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Carreramyia</taxonomicName>
). Unfortunately, the genitalia of the only known specimen of
<taxonomicName class="Insecta" family="Syrphidae" genus="Masarygus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Masarygus" order="Diptera" pageId="35" pageNumber="36" phylum="Arthropoda" rank="genus">Masarygus</taxonomicName>
species 2 are lost: there is a microvial containing postabdominal segments attached to the pin, but there are no genitalia in it.
</paragraph>
</subSubSection>
<subSubSection pageId="35" pageNumber="36" type="distribution">
<paragraph pageId="35" pageNumber="36">Diversity and distribution.</paragraph>
<paragraph pageId="35" pageNumber="36">
Described species: 2. Neotropical. At least two undescribed species are known to occur (see
<taxonomicName genus="Discussion" lsidName="Discussion" pageId="35" pageNumber="36" rank="genus">Discussion</taxonomicName>
). All species known so far, including the undescribed ones, have only been collected on one occasion.
</paragraph>
</subSubSection>
</treatment>
</document>
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