Sphegina (Asiosphegina) karnataka, Steenis & Hippa & Mutin, 2018

Steenis, Jeroen Van, Hippa, Heikki & Mutin, Valeri A., 2018, Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae), European Journal of Taxonomy 489, pp. 1-198 : 111-114

publication ID

https://doi.org/10.5852/ejt.2018.489

publication LSID

lsid:zoobank.org:pub:B234C53F-BB56-4F3D-B400-F214E19DCF90

DOI

https://doi.org/10.5281/zenodo.3850125

persistent identifier

https://treatment.plazi.org/id/5189A7C3-FA7B-45CA-8083-528F13F3DABE

taxon LSID

lsid:zoobank.org:act:5189A7C3-FA7B-45CA-8083-528F13F3DABE

treatment provided by

Valdenar

scientific name

Sphegina (Asiosphegina) karnataka
status

sp. nov.

Sphegina (Asiosphegina) karnataka sp. nov.

urn:lsid:zoobank.org:act:5189A7C3-FA7B-45CA-8083-528F13F3DABE

Figs 50F View Fig , 52F View Fig , 53 View Fig , 54 View Fig D–E, 56A

Differential diagnosis

Very different from all other Sphegina and easily distinguished by the characters given in the key. The spoon-shaped lobe posteriorly on male sternum IV (without expanded apical part in other species) and the deeply bilobed surstylus, with the ventral lobe on the right side as long as the dorsal one (much shorter) are easily observed and unique characters.

Etymology

The specific epithet is derived from the type locality, Karnataka State in India. The name is a noun in apposition.

Material examined

Holotype

INDIA • ♂; “ S. India: Karnataka / Kemmangundi 1200–1500 m / 11–16.ix.1977 / Zool. Mus. Copenhagen Exp”; ZMUC.

Paratype

INDIA • 1 ♂; same data as for holotype; arista missing; JSA .

Description

Male

LENGTH. Body 6.9–7.2 mm, wing 5.3–5.5 mm.

HEAD. Face in lateral view ( Fig. 54D View Fig ) concave, strongly projected antero-ventrally; frontal prominence very weakly developed. Ratio width of vertex at anterior ocellus: width of head 1: 6.1–6.5; ratio width of ocellar triangle: width of vertex 1: 1.1–1.2; ratio length of ocellar triangle: length of frons 1: 2.1–2.4. Face yellow, light grey pollinose, long pilose along eye-margin. Hypostomal bridge yellow, long pale pilose. Gena and mouth edge yellow with large subtriangular non-pollinose shiny area. Frons and vertex black, predominantly grey pollinose, a trapezoidal area posterior of lunula non-pollinose and shiny, a wide subtriangular macula of heavier grey pollinosity at eye-margin posterior of the shiny part, and medial part with sooty-black pollinosity ( Fig. 54E View Fig ); pile short, light yellow. Frons with weak medial furrow. Occiput black, light grey pollinose, light yellow pilose. Eye with an area of enlarged facets at anterior margin. Antenna yellow with black setae dorsally on scape and pedicel; basoflagellomere elongate, ratio width: length 1: 1.8–2.0; arista long pilose, about 3 times as long as basoflagellomere.

THORAX. Colour brown to dark brown, weakly greyish pollinose, scutum with more densely grey pollinose vitta submedially and laterally; postpronotum, postalar callus and dorso-medial part of anepisternum and anepimeron brown-yellow; posterior margin of katepisternum widely non-pollinose, shiny; scutum and pleuron with very short adpressed light yellow pile. Scutellum sub-rectangular, black, slightly pollinose, with pile slightly longer than on scutum, with two very widely set, very short setae medially at posterior margin, ratio length of scutellum: length of seta 1: 0.8–0.9.

WING. Microtrichose, extensively bare on basal cells; hyaline, stigma yellowish, infuscated along veins bm-cu, dm-cu, M1 and R4+5 apically from junction with vein M1 and at junction of veins R2+3 and R4+5. Crossvein dm-cu meeting vein M slightly oblique to nearly perpendicular and vein M1 meeting vein R4+5 perpendicularly.

LEGS. Pro- and mesoleg yellow, tarsomeres 3–5 black. Metaleg, Fig. 52F View Fig , with coxa and trochanter black; femur black and yellow biannulate, strongly incrassate, ratio width: length 1: 3.3–3.5; tibia black and yellow biannulate with long apicoventral dens; tarsus entirely black, basitarsomere rather thin, ratio width: length 1: 3.5–3.7.

ABDOMEN. Length ratio of terga I: II: III: IV 1: 3.8–4.0: 1.8–2.1: 1.3–1.5; ratio width at posterior margin: medial length of tergum II and III 1: 3.2–3.5 and 1: 0.7–0.8. Terga dark brown, anterior ⅓ of tergum III with brown-yellow fascia which is medially strongly constricted; pile pale, on terga short, laterally on terga I and II long; tergum I with a horizontal row of 3 strong brown-yellow setae at lateral margin; sternum III not sclerotized; sternum IV, Fig. 53B View Fig ; sterna VI, VII and VIII simple, with long yellow pile. Genitalia, Fig. 53 View Fig C–F: note the slightly asymmetrical surstyli with the transversely expanded apex of dorsal lobe on the left side one, and the asymmetrical superior lobes.

Female

Unknown.

ZMUC

Zoological Museum, University of Copenhagen

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Sphegina