Sphegina (Asiosphegina) mirifica Hippa, van Steenis & Mutin, 2015

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 : 125-126

Sphegina (Asiosphegina) mirifica Hippa, van Steenis & Mutin, 2015

Figs 63B , 77A

Sphegina (Asiosphegina) mirifica Hippa, van Steenis & Mutin, 2015: 36 . Type locality: Kambaiti, Myanmar (holotype, ♂, NHM).

Material examined

MYANMAR • 1 ♀; “ N.E. Burma / Kambaiti 2000 m / 12–17.6.[19]34 [leg] Malaise”; JSA .

Description

Female

LENGTH. Body 6.9 mm, wing 5.9 mm.

HEAD. Face in lateral view concave, weakly projected antero-ventrally; frontal prominence weakly developed. Ratio width of vertex at anterior ocellus: width of head 1: 3.5; ratio width of ocellar triangle: width of vertex 1: 2.3; ratio length of ocellar triangle: length of frons 1: 3.0. Face dark brown to black; grey pollinose, long pilose along eye-margin. Hypostomal bridge dark brown, long pale pilose. Gena black, mouth edge red-brown with large subtriangular non-pollinose shiny area. Frons and vertex dark brown, slightly greyish pollinose, except frons with semi-circular non-pollinose and shiny part posteriorly from lunula; pile short, light yellow. Frons with weak, wide pit antero-medially. Occiput black, light grey pollinose, light yellow pilose. Eye without enlarged facets at anterior margin. Antenna dark brown with black setae dorsally on scape and pedicel; basoflagellomere missing.

THORAX. Colour dark brown to black, grey pollinose, pleuron entirely more heavily grey pollinose; scutum and pleuron with very short adpressed light yellow pile. Scutellum semicircular, dark brown, sub-shiny, faintly 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 setae 1: 0.9.

WING. Entirely microtrichose; hyaline, stigma yellowish, membrane brown infuscated at junction of veins R 2+3 and R 4+5, along veins bm-cu, dm-cu, r-m, M 1, the extra crossvein between R 2+3 and R 1, at the junction of veins M 1 and R 4+5 and at apical appendix of vein R 2+3. Crossvein dm-cu meeting vein M perpendicularly and vein M 1 meeting vein R 4+5 perpendicularly. Apical part of vein R 2+3 with long appendix and extra crossvein between veins R

1

and R

2+3

.

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 and trochanter yellow; femur yellow to orangeyellow, incrassate, ratio width: length 1: 4.2; tibia black and yellow biannulate, without apicoventral dens; tarsus entirely black, basitarsomere thick, ratio width: length 1: 3.3.

ABDOMEN. Length ratio of terga I: II: III: IV: V 1: 2.7: 2.3: 1.6: 0.8; ratio width at posterior margin: medial length of tergum II and III 1: 2.1 and 1: 0.9. Tergum I brown, terga II–V orange-yellow; pile

pale, on terga short, laterally on terga I and II long; tergum I, Fig. 77A with 2 strong light yellow setae at lateral margin; sternum III ellipsoidal, ratio width: length 1: 2.8; sternum IV trapezoidal, ratio width: length 1: 1.6, and sternum V squarish with strong transverse rim at posterior margin, ratio width: length 1: 1.1.

Remarks

Known only from the type material from Myanmar, Kambaiti ( Hippa et al. 2015) and the here studied specimen.

Figures

Fig. 63. Habitus, lateral view. A. Sphegina (Asiosphegina) minuta Hippa, van Steenis & Mutin, 2015, paratype, Ƌ, Myanmar. B. S. (A.) mirifica Hippa, van Steenis & Mutin, 2015, ♀, Myanmar. C. S. (A.) nigerrima Shiraki, 1930, Ƌ, Taiwan. D. S. (A.) nigrotarsata sp. nov., paratype, Ƌ, Vietnam. E. S. (A.) nubicola sp. nov., holotype, Ƌ, Thailand. F. S. (A.) ornata sp. nov., holotype, Ƌ, China. Scale bars = 1.0 mm.

Fig. 77. Tergum I, dorsal view (A, E–F) and lateral view (B–D). A. Sphegina (Asiosphegina) mirifica Hippa, van Steenis & Mutin, 2015, ♀, Myanmar. B. S. (A.) nigerrima Shiraki, 1930, Ƌ, Taiwan. C. S. (A.) bispinosa Brunetti, 1915, Ƌ, Nepal. D. S. (A.) philippina Thompson, 1999, paratype, ♀, Philippines. E. S. (A.) raduloides Hippa, van Steenis & Mutin, 2015, paratype, Ƌ, Myanmar. F. S. (A.) cf. spathigera sp. nov., ♀, Philippines. Scale bars = 0.5 mm.