| Sphegina atrimanus | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Syrphidae |
| Genus: | Sphegina |
| Species: | S. atrimanus |
| Binomial name | |
| Sphegina atrimanus Hippa, Steenis & Mutin, 2018 [1] | |
Sphegina (Asiosphegina) atrimanus is a species of hoverfly in the family Syrphidae found in Vietnam. [1]
The name comes from Latin ‘atrimanus’, meaning ‘black-hand’, referring to the predominantly black protarsus. [1]
In male specimens, body length is 6.2 millimeters and wing length is 5.2 millimeters. The face is black, ventral half yellow; concave, with a strongly developed frontal prominence. The gena and mouth edge are yellow with a large subtriangular non-pollinose shiny area; frons and vertex black; occiput black with light yellow pilose; scape dark brown; pedicel and basal flagellomere dark yellow; thorax dark brown to black; postpronotum and medial part of pleuron yellow; scutellum black, subtriangular, shiny medially; pro- and mesoleg yellow, protarsus with tarsomere 1 on basal half yellow, on apical half black, tarsomeres 2–5 black and mesotarsus with tarsomeres 4 and 5 dark brown to black; metaleg with coxa black, trochanter yellow; femur black and yellow biannulate, slightly incrassate and club shaped; tibia black and yellow biannulate, without apicoventral dens; tarsus entirely black, basal tarsomere very thick. The basal flagellomere is oval, the arista short and pilose, about three times as long as the basal flagellomere. No female specimens are known. [1]
S. (A.) atrimanus is similar to S. (A.) granditarsis , S. (A.) nigrotarsata , and S. (A.) orientalis , as all have an area of very long setae on the cercus as well as small setae on the surstylar apodeme and the membrane between the apodeme and the ventral margin of tergum IX. However, S. (A.) atrimanus differs by having the angle between dorsal and ventral lobe of the surstylus as a right angle (acute in the others); by having the apex of its ventral lobe long, extending much more ventrally than the posterior part of the surstylar apodeme (both approximately at the same level in the others); and by having the cercus enlarged. S. (A.) atrimanus is similar also to S. (A.) nasuta , but differs by having the dorsal lobe of surstylus slightly angled and dilated on the apical part (evenly curved and evenly tapering towards the apex in S. (A.) nasuta). The genitalia of S. (A.) atrimanus and S. (A.) incretonigra are almost identical, the only difference being that the former has the apical part of the surstylus, especially on the left side, and the superior lobe wider. [1]
Sphegina angustata is a species of hoverfly in the family Syrphidae found in Nepal. It's similar to S. abbreviata, though it's differentiated by having only a dorsal sublobe posteriorly on the male superior lobe instead of both dorsal and ventral, and by having the dorsal sublobe be long and pointed instead of apically short and truncate.
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) 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 dentata is a species of hoverfly in the family Syrphidae found in Taiwan.
Sphegina uncinata is a species of hoverfly in the family Syrphidae found in Myanmar. It's easily identified by a straight dorsal line of frontal prominence that ends just before the ocellar triangle, a strongly projecting mouth edge, and a vibrissal angle more strongly protruding than the frontal prominence.
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) bidens 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 apicalis is a species of hoverfly in the family Syrphidae found in Taiwan.
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.
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