Sphegina adusta

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Sphegina adusta
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Syrphidae
Genus: Sphegina
Species:
S. adusta
Binomial name
Sphegina adusta
Hippa, Steenis & Mutin, 2015 [1]

Sphegina (Asiosphegina) adusta is a species of hoverfly in the family Syrphidae found in Myanmar. It's easily identified by its large size, left side surstylus with a number of unusual lobes, and general dark-brown coloration. It's similar to S. atricolor and S. furva , but unlike these species it lacks a transverse crest at the base of the lobe located sinistrolaterally at the posterior margin of male sternite IV. [1]

Contents

Etymology

The name comes from Latin 'adusta', meaning 'tanned' or 'brown', referring to its almost entirely dark-brown coloration. [1]

Description

In male specimens, body length is 8.3 millimeters and wing length is 6.3 millimeters. The face is strongly concave, moderately projected antero-ventrally, with a weakly developed frontal prominence. The face is blackish brown, medially slightly paler brown; gena brown; occiput black; antenna blackish; thorax blackish brown; scutellum shiny dark brown, the margin slightly paler brown; pro- and mesolegs brown; terga III and IV brownish black. The wings are slightly brownish with brown stigma. The basal flagellomere is as long as it is broad and semi-quadrangular; the arista is covered in soft hairs. The surstylus is strongly asymmetrical and the superior lobes are symmetrical; the left side surstylus has a number of unusual lobes. Female specimens are much the same except for normal sexual dimorphism; body length is 8.6 millimeters and wing length is 7.7 millimeters. Tergite II is predominantly dark-orange and tergite I has an oblique row of four yellow setae. [1]

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References

  1. 1 2 3 4 Hippa, H.; Steenis, J. van; Mutin, V.A. (2015). "The genus Sphegina Meigen (Diptera, Syrphidae) in a biodiversity hotspot: the thirty-six sympatric species in Kambaiti, Myanmar". Zootaxa. 3954: 1–67. doi:10.11646/zootaxa.3954.1.1. PMID   25947834 . Retrieved 4 November 2021.


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