Sphegina (Asiosphegina) collicola, 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 : 58-61

Sphegina (Asiosphegina) collicola sp. nov.

urn:lsid:zoobank.org:act:BABAB4E8-692E-45E8-BAEB-01F3A141D5BC

Figs 19E , 21 K–L, 22, 23A

Differential diagnosis

Similar to Sphegina (Asiosphegina) bifida sp. nov. and S. (A.) inventum sp. nov. For distinguishing characters, see under S. (A.) inventum sp. nov.

Etymology

The specific epithet is from the Latin ‘ collicola ’, meaning ‘inhabitant of hills’ and referring to the type locality on hills.

Material examined

Holotype

MALAYSIA • ♂; “ Malaysia, / Penang Island / Penang Hill / 22.xi.1979 / Peter Nielsen leg.”; head damaged, antennae missing, slightly discoloured; ZMUC.

Paratype

MALAYSIA • 1 ♂; “Malaya / 16 mi NE / Kuala Lumpur / 1000’ VIII–12–[19]62”; “Collectors: / E.S. Ross / D.Q. Cavagnaro ”; most of the legs missing and wings shriveled; CAS .

Description

Male

LENGTH. Body 5.8–6.0 mm, wing 5.1–5.4 mm.

HEAD. Face in lateral view ( Fig. 21K ) concave, less projected antero-ventrally than frontal prominence; frontal prominence very weakly developed. Ratio width of vertex at anterior ocellus: width of head 1: 7.9; ratio width of ocellar triangle: width of vertex 1: 1.1; ratio length of ocellar triangle: length of frons 1: 3.7. Face black, light grey pollinose, long pilose along eye-margin. Hypostomal bridge black, long pale pilose. Gena and mouth edge black with large subtriangular non-pollinose shiny area. Frons and vertex black, velvet black pollinose, a narrow oval area posterior of lunula shiny non-pollinose and 2 squarish anterolateral grey pollinose macula along eye-margin ( Fig. 21L ); pile short, light yellow. Occiput black, light grey pollinose, light yellow pilose. Eye with an area of enlarged facets at anterior margin. Antenna with scape and pedicel black, basoflagellomere dark brown with several black setae dorsally on scape and pedicel; basoflagellomere oval, ratio width: length 1: 1.5; arista long pilose, about 2.5 times as long as basoflagellomere.

THORAX. Colour black, greyish pollinose; posterior margin of katepisternum narrowly non-pollinose, shiny; scutum and pleuron with very short adpressed light yellow pile. Scutellum sublunalar, black, greyish pollinose, with pile slightly longer than on scutum, marginal setae broken off in the single specimen.

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 yellow, tarsomeres 4 and 5 brown to dark brown. Metaleg, Fig. 14D , with coxa black, trochanter yellow; femur with basal 1/6 yellow, incrassate, ratio width: length 1: 3.5; tibia yellow with apical ⅓ black, with short pointed apicoventral dens; tarsus entirely black, basitarsomere thick, ratio width: length 1: 3.1.

ABDOMEN. Length ratio of terga I: II: III: IV 1: 4.0: 2.0: 1.9; ratio width at posterior margin: medial length of tergum II and III 1: 3.6 and 1: 0.8. Terga black, anterior ⅜ of tergum III with yellow fascia; pile pale, on terga short, laterally on terga I and II long; tergum I with 3 evenly separated strong light yellow setae at lateral margin; sternum III undifferentiated; sternum IV, Fig. 22B ; sterna VI, VII and VIII ( Fig. 22B ) with long yellow pile, sternum VII with conical rounded tubercle. Genitalia, Fig. 22 C–F: note the almost symmetrical surstyli and superior lobes.

Female

Unknown.

Figures

Fig. 19. Metaleg, anterior view. A. Sphegina (Sphegina) abbreviata sp. nov., paratype, ♀, Nepal. B. S. (S.) angustata sp. nov., paratype, ♀, Nepal. C. S. (S.) uncinata Hippa, van Steenis & Mutin, 2015, Ƌ, Myanmar. D. Sphegina (Asiosphegina) brevipilis sp. nov., paratype, Ƌ, China, abbreviations: a = length of basitarsus of metatarsus; b = width of basitarsus of metatarsus. E. S. (A.) collicola sp. nov., holotype, Ƌ, Malaysia. F. S. (A.) crinita sp. nov., paratype, ♀, Java, abbreviations: a = length of metafemur; b = width of metafemur. Scale bars = 0.5 mm.

Fig. 21. Head, lateral view (A, D, F, J–K), dorsal view (B, C, G–H, L), frontal view (E, I). A–B. Sphegina (Asiosphegina) albolobata sp. nov., holotype, Ƌ, Vietnam. C. S. (A.) amplistylus sp. nov., holotype, Ƌ, Philippines. D. S. (A.) apicalis Shiraki, 1930, ♀, Taiwan. E. S. (A.) bifida sp. nov., holotype, Ƌ, Sabah, Malaysia. F–G. S. (A.) bracon sp. nov., paratype, Ƌ, Vietnam. H–I. S. (A.) bispinosa Brunetti, 1915, Ƌ, Nepal. J. S. (A.) brevipilis sp. nov., holotype, Ƌ, China. K–L. S. (A.) collicola sp. nov., paratype, Ƌ, Malaysia. Scale bars = 0.5 mm.

Fig. 14. Sphegina (Asiosphegina) bifida sp. nov., holotype, Ƌ. A. Sternum IV, ventral view. B. Left surstylus, lateral view. C. Left superior lobe, lateral view. D. Genitalia, right side, lateral view. Scale bars = 0.5 mm.

Fig. 22. Sphegina (Asiosphegina) collicola sp. nov., holotype, Ƌ. A. Posterior part of abdomen, left side, lateral view. B. Sternum IV, left side, ventral view. C. Left surstylus, lateral view. D. Left surstylus, in more latero-ventral view. E. Left superior lobe, lateral view. F. Genitalia, right side, lateral view. Scale bars = 0.5 mm.