Sphegina crassispina

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

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. [1] 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. [2]

Contents

Etymology

The name comes from the Latin words 'crassus', meaning 'big', and 'spina', meaning 'thorn', referring to the strong spine-like setae on the male sternite IV. [1]

Description

Like other species in its genus, S. crassispina is small, slender, and wasp-like. In male specimens the body length is 8.3–8.4 millimeters (6.0–7.5 in females). The wings are 6.5–6.9 millimeters long (5.4–6.6 in females) and vary from hyaline to weakly brownish, with a brown infuscated pattern and yellowish stigma. The face is black, strongly concave, strongly projected antero-ventrally with a weakly developed frontal prominence. The antenna are brown, the basal flagellomere oval and paler than the scape and pedicel, baso-ventrally reddish; the arista is pilose. The gena is shiny black; frons and vertex dull black; lunula shiny brown; occiput dull black; thorax black; scutellum semicircular with lateral part brown. The pro- and mesoleg are yellow, tarsomeres 4 and 5 black; metaleg with coxa brown, trochanter yellow, simple; metafemur black, the basal 1/3 yellow; metatibia yellow with the apical 1/5 and an annulus on the basal 1/2 brownish, without a distinct apico-ventral tooth-like projection; metatarsus black with golden pile. The surstyli and superior lobes are asymmetrical and there's a short finger-like process sub-basally on the medial side of the dorsal lobe of the surstylus. [1]

S. crassispina is similar to S. carinata , S. malaisei , and S. index , though it can be differentiated by male sternite IV (the four enlarged setae on the left side are steadily diminishing in length towards the medial line instead of being two longer + two shorter ones as in the other species), the right side surstylus (broader than in the other species), and the arrangement of sublobes on the superior lobe (different in all these species).

S. crassispina is also similar to S. bispinosa and S. hansoni , though it differs from both by the hyaline wing (with infuscated pattern in the other species), three short stout setae on the left side of male sternite IV (seven long and strong setae in S. bispinosa, three in S. hansoni), having the metafemur without long setae subapically on the prolateral side (2–3 setae in S. bispinosa), lacking a long seta subapically on the prolateral side of the metafemur (present in S. hansoni), and by the asymmetrical surstyli (nearly symmetrical in S. hansoni). [1]

Related Research Articles

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Sphegina (Asiosphegina) bilobata is a species of hoverfly in the family Syrphidae found in Myanmar. It's set apart from other species by its general pale yellowish color with three black longitudinal stripes on the scutum combined with the infuscated pattern at cross veins on the wing. The male sternite IV with its symmetrical pair of short spinose lobes posteriorly is quite distinct.

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.

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Sphegina culex 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.

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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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References

  1. 1 2 3 4 5 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 11 November 2021.
  2. ↑ Steenis, J. van; Hippa, H.; Mutin, V.A. (2018). "Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae)". European Journal of Taxonomy (489): 1–198. doi: 10.5852/ejt.2018.489 . S2CID   165348351 . Retrieved 13 November 2021.
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