Sphegina (Asiosphegina) achaeta Hippa, van Steenis & Mutin 2015
Creators: name: Steenis, Jeroen Van
name: Hippa, Heikki
name: Mutin, Valeri A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Sphegina
Sphegina achaeta

description: Sphegina (Asiosphegina) achaeta Hippa, van Steenis &Mutin, 2015
Figs 6 A–B, 13A
Sphegina (Asiosphegina) achaeta Hippa, van Steenis & Mutin, 2015: 58. Type locality: Kambaiti, Myanmar (holotype, ♂, NHRS).
Material examined
MYANMAR • 1 ♀; “ N. E. Burma / Kambaiti, 7000 ft. / 7. v. 1934 / [leg] R. Malaise ” • 1 ♀; “ N. E. Burma / Kambaiti 7000 ft. / 14.5.1934 [leg] Malaise ”; NHM • 1 ♀; same data as for preceding; JSA • 1 ♀; “ N. E. Burma / Kambaiti, 7000 ft. / 9.6.1934 [leg] Malaise ”; JSA • 1 ♀; “ N. E. Burma, / Kambaiti, 2000 m. / 11.5.1934 [leg] Malaise ”; NHRS • 1 ♀; “ N. E. Burma / Kambaiti, 2000 m. / 12.5.1934 [leg] Malaise ”; JSA.
Description
Female
LENGTH. Body 6.1–7.2 mm, wing 5.5–6.3 mm.
HEAD. Face in lateral view concave, strongly projected antero-ventrally; frontal prominence strongly developed. Ratio width of vertex at anterior ocellus: width of head 1: 3.5–3.7; ratio width of ocellar triangle: width of vertex 1: 2.3–2.5; ratio length of ocellar triangle: length of frons 1: 3.5–4.2. Face dark brown; grey pollinose, long pilose along eye-margin. Hypostomal bridge black, long pale pilose. Gena and mouth edge dark brown with large subtriangular non-pollinose shiny area. Frons and vertex black, slightly pollinose, except anterior half of frons non-pollinose and shiny; pile short, light yellow. Frons with wide circular depression medially. Occiput black, light grey pollinose, light yellow pilose. Antenna dark brown with black setae dorsally on scape and pedicel; basoflagellomere short-oval, ratio width: length 1: 1.1; arista pilose, slightly more than 2.5 times as long as basoflagellomere.
THORAX. Colour dark brown to black, postpronotum red-brown; weakly brown pollinose with four grey pollinose vitta on entire scutum, pleuron entirely grey pollinose; scutum and pleuron with very short appressed light yellow pile. Scutellum semi-circular, black, brown pollinose, pile slightly longer than on scutum, with two widely set setae of medium length, ratio length of scutellum: length of seta 1: 1.5–1.7.
WING. Entirely microtrichose; hyaline, stigma yellowish. Crossvein dm-cu meeting vein M obliquely and vein M 1 meeting vein R
4+5
perpendicularly.
LEGS. Pro- and mesoleg with femora and tibiae dark brown to black on apical ⅔ to ¾; tarsi with tarsomeres 2–5 black. Metaleg with coxa dark brown, trochanter yellow; femur black with basal ¼ yellow, incrassate, ratio width: length 1: 3.4–3.6; tibia black and yellow biannulate, without apicoventral dens; tarsus entirely black, basitarsomere thin, ratio width: length 1: 3.8.
ABDOMEN. Length ratio of terga I: II: III: IV: V 1: 2.4–3.5: 1.8–2.4: 2.4–2.8: 0.5–0.9; ratio width at posterior margin: medial length of tergum II and III 1: 1.2–1.8 and 1: 0.6. Terga black, tergum II with sub-anterior light-brown fascia, anterior ⅓ of tergum III with yellow fascia; pile short, light yellow; tergum I, Fig. 8A with oblique row of 5 white and weak setae at lateral margin; sternum III rectangular, ratio width: length 1: 1.3–1.4; sternum IV trapezoidal, ratio width: length 1: 0.6–0.7 and sternum V trapezoidal with widest part anteriorly, ratio width: length 1: 0.7.
Remarks
Only known by the type material from Myanmar, Kambaiti (Hippa et al. 2015) and the female specimens studied here from the same locality.
description: Published as part of Steenis, Jeroen Van, Hippa, Heikki & Mutin, Valeri A., 2018, Revision of the Oriental species of the genus Sphegina Meigen, 1822 (Diptera: Syrphidae), pp. 1-198 in European Journal of Taxonomy 489 on pages 27-29, DOI: 10.5852/ejt.2018.489, http://zenodo.org/record/3830537