Acerocnema vanga Chagnon & Sinclair 2021, sp. nov.

• Main Authors: Chagnon, Marie-Eve, Sinclair, Bradley J.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Scathophagidae; Acerocnema; Acerocnema vanga; Herschel; Nome; Alaska; Yukon
• Online Access: https://doi.org/10.5281/zenodo.4701404

Acerocnema vanga sp. nov. (Figs 7, 8, 13, 18, 22, 26) urn:lsid:zoobank.org:act: 413C22B3-40E2-455E-B5F2-28638951B664 Type material examined. HOLOTYPE ♂ labelled: “Y. T. British Mts. / 69°13′N 140°05′W / 21–25. VI. 84 320m / G. & M. Wood &/ D. Lafontaine ”; CNC/ 1589605 ”; “ HOLOTYPE / Acerocnema / vanga/ Chagnon & Sinclair [red label]”; “ CNC/ 1589605 ” (CNC). PARATYPES: CANADA. Yukon: same data as holotype (7♀, 13♂, CNC); Firth River [68°50′10.9″N 140°36′00.9″W], 11.vii.1956, R. E. Leech (1♀, CNC); Firth River [68°50′10.9″N 140°36′00.9″W], 14.vii.1956, E.F. Cashman (1♂, CNC); same data except, 17.vii.1956 (1♀, CNC); Herschel Is [69°34′45.7″N 138°54′19.2″W], 7–16.vii.1971, W. R.M. Mason (1♀, CNC); Herschel Is [69°34′45.7″N 138°54′19.2″W], 28–29.vi.1971, D.M. Wood (1♀, CNC). USA. Alaska: Nome Area, mi 17 Kougarok Rd, 64.71°N 163.30°W, 21.vi.2005, MT, J.& R. Skevington (5♂, CNC). Diagnosis. This species is distinguished by the dark postpedicel in both sexes and scutum without pair of shiny vittae. Description. Male. Body primary colour black; pleura black; scutum black; entire body pruinose, without shiny scutal vittae. Setae on head yellow. Head with face and gena yellow; genal width 1/3 eye height; postgena yellow; postocellar triangle brown. Frontal vitta dark yellow, darker than gena; fronto-orbital plate black transitioning to yellow anteriorly; parafacial yellow. Fronto-orbital plate with 3 inclinate frontal setae, 1 proclinate and 1 lateroclinate orbital seta, 1 pair of lateroclinate ocellar setae, 1 pair of short divergent postocellar setae, 1 long yellow inclinate inner vertical seta and 1 lateroclinate outer vertical seta, shorter than inner vertical seta. Vibrissa strong, with 2 short supravibrissal setae and 1–3 short subvibrissal setae, all yellow. Antenna with postpedicel black, about five times as long as pedicel; scape and pedicel black; arista black, bare, not longer than postpediccel. Palpus yellow with pale setulae over surface and slightly flattened at tip. Thorax with scutal ...