| Sphegina dentata | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Syrphidae |
| Genus: | Sphegina |
| Subgenus: | Asiosphegina |
| Species: | S. dentata |
| Binomial name | |
| Sphegina dentata Hippa, Steenis & Mutin, 2018 [1] | |
Sphegina dentata is a species of hoverfly in the family Syrphidae found in Taiwan. [1]
The name comes from Latin ‘dentata’, meaning ‘dentate’, referring to the dentate male cercus.
In male specimens, the body length is 7.1–7.9 millimeters. The wings are 5.4–5.9 millimeters, entirely microtrichose and hyaline, with brownish stigma. The face is black, concave, strongly projected antero-ventrally, with a weakly developed frontal prominence and long pilose along the eye-margin. The gena and mouth edge are black, with a large subtriangular non-pollinose shiny area; frons and vertex black; a large trapezoidal area posterior of the lunula non-pollinose and shiny; occiput black, with light yellow pilose; antenna dark brown to black with black setae dorsally on scape and pedicel, basal flagellomere round; arista only basally short and pilose, slightly more than three times as long as the basal flagellomere. The thorax is black; scutellum black, semicircular, black, and shiny; pro- and mesoleg yellow on basal 1/10 of femora and basal ¼–⅓ of tibiae, tarsomeres 1–2 dark yellow; metafemur black with basal 1/5 yellow, slightly incrassate; metatibia black and yellow biannulate, without apicoventral dens; metatarsus entirely black, basal tarsomere rather thin; terga black. The surstyli and superior lobes are only slightly asymmetrical and the cerci are dentate and asymmetrical. No female specimens are known. [1]
S. dentata is similar to S. nigerrima , though it differs by having the lower epimeron with entirely grey pollinose (anterior half of the lower epimeron non-pollinose and shiny in S. nigerrima) as well as squarish and dentate cerci (cerci non-dentate in S. nigerrima). The male genitalia are similar to S. tricoloripes and S. umbrosa , though it differs from the latter by having a strongly sclerotized subapical tooth on the cercus and from the former by having only one cercal tooth instead of a row of 3–4 teeth. All three species resemble the East-Palaearctic species S. elongata , S. freyana , and S. grunini , but differ by having entirely grey pollinose pleura (instead of having the pleura extensively non-pollinose and shiny). [1]
Sphegina (Asiosphegina) amplistylus is a species of hoverfly in the family Syrphidae found in the Philippines. It's similar to S. inflata, S. philippina, and S. spathigera.
Sphegina (Asiosphegina) atrimanus is a species of hoverfly in the family Syrphidae found in Vietnam.
Sphegina (Asiosphegina) bifida is a species of hoverfly in the family Syrphidae found in Malaysia. It's similar to S. (A.) inventum, though it's differentiated by having the male superior lobe on both sides longer than wide instead of wider than long.
Sphegina bracon is a species of hoverfly in the family Syrphidae found in Vietnam along with specimens of S. (A.) lucida, S. (A.) nigrotarsata, S. (A.) spenceri, S. (A.) verrucosa, and S. (A.) vietnamensis.
Sphegina (Asiosphegina) brevipilus is a species of hoverfly in the family Syrphidae found in China. It's similar to both S. (A.) plautus and S. (A.) simplex; it and S. (A.) plautus are the only known species with a sclerite between the bases of surstyli as well as posteriorly from the cerci.
Sphegina clavigera is a species of hoverfly in the family Syrphidae found in Vietnam. It's similar to S. crassispina and S. hauseri.
Sphegina collicola is a species of hoverfly found in Malaysia.
Sphegina crinita is a species of hoverfly in the family Syrphidae found in Malaysia and Indonesia. It's easily identified by its superior lobes, the left side one being pushed over the medial line of the hypandrium to the right side so that the right side one seems bilobed. Otherwise, the genitalia are nearly identical to those in S. fimbriata.
Sphegina (Asiosphegina) achaeta is a species of hoverfly in the family Syrphidae found in Myanmar. It's easily identified by the weak setae on abdominal tergite I. It's similar in appearance to S. adusta but easily differentiated upon closer examination. The male genitalia are similar to S. pollex and S. culex, though it can be distinguished by having an acute posterodorsal corner of the superior lobe and a broader surstylus; it differs further from S. pollex by lacking a sub-basal dorsal thumb-like lobe. The arrangement of bristles on tergite I is similar to S. japonica.
Sphegina (Asiosphegina) albolobata is a species of hoverfly in the genus Sphegina found in Vietnam. It's similar to S. (A.) licina, but differs by having the ventral lobe of both gonostyli narrower, apicodorsal part of the right superior lobe shorter, and the ventral part of the left superior lobe with more prominent anterior, medial, and posterior lobes.
Sphegina (Asiosphegina) atricolor is a species of hoverfly in the family Syrphidae found in Myanmar.
Sphegina (Asiosphegina) carinata is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level.
Sphegina crassispina is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level. A specimen was found in China that fits the description of S. crassispina save for the more extensively shiny frons and the slightly more protruding frontal prominence.
Sphegina crucivena is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level.
Sphegina cultrigera is a species of hoverfly in the family Syrphidae found in Kambaiti Pass, Myanmar, a montane forest with swampy areas and streams located 2000 meters above sea level.
Sphegina apicalis is a species of hoverfly in the family Syrphidae found in Taiwan.
Sphegina (Asiosphegina) asciiformis is a species of syrphid fly in the family Syrphidae found in India.
Sphegina (Asiosphegina) bispinosa is a species of hoverfly in the family Syrphidae found in India, Nepal, and Bhutan. It's similar to S. (A.) hansoni, but easily differentiated by the strongly asymmetrical surstyli.
Sphegina guptai is a species of hoverfly in the family Syrphidae found in India. It's similar to S. elegans in general appearance and characters of the male genitalia. It differs from known Oriental species of Sphegina by the shiny black abdomen with widened terga III and IV. Only S. quadrisetae has a somewhat similar appearance.
Sphegina quadrisetae is a species of hoverfly in the family Syrphidae found in China. It's characterized by the long black pile posterior of the posteromedial corner of the eye, the scutellum with four long black setae at posterior margin, and the black and extremely strongly antero-ventrally projected face.
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