Coenosia setosa Couri & Pont, 2016, sp. nov.
Creators: name: Couri, Marcia S.
name: Pont, Adrian C.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Muscidae
Coenosia
Coenosia setosa

description: Coenosia setosa sp. nov.
(Figs 3, 22–25)
Type material examined. Holotype male, ANGOLA: (A6), Tundavala, 9 mls. NW. Sa da Bandeira, 23.ii. 1972 / Southern African Exp., B.M.1972-1. Paratypes, 2 males (1 MNRJ), 2 females (1 MNRJ), same labels as holotype.
Diagnosis. Scutum and scutellum uniformly silver-grey pollinose from certain angles in male; female with three faint brown vittae; cercal plate very distinct, with long and curly hairs, and with 2 spines on ventral surface.
Description. (Fig. 3) Ground-colour brown, uniformly grey pollinose from certain angles; head with frontal vitta dark brown; ocellar triangle silver pollinose; fronto-orbital plate, face, parafacial and gena silver pollinose; antenna dark brown, tip of pedicel grey pollinose; arista brown; palpus dark brown; scutum and scutellum uniformly silvery-grey pollinose from certain angles in male; female with three faint brown vittae; calypters white; haltere yellow; wing clear; legs dark brown, coxae with grey pollinosity; abdomen uniformly silvery-grey pollinose from certain angles, concolorous with thorax in male; female with brown spots and a median vitta on all tergites; cercal plate with 2 spines and 2 submedian structures on ventral view (Fig. 24).
Male. Body length: 3.3 mm; wing length: 3 mm.
Head. Eye bare; frons very narrow; frontal row with 4 pairs of setae, and 1 pair of reclinate orbitals; inner and outer verticals short, similar in size; ocellars hair-like; antenna inserted at mid-level of eye, with postpedicel about twice the length of pedicel; arista plumose on basal half; palpus filiform.
Thorax. Acrostichal setulae short, in 4 rows, prescutellar pair not differentiated; dorsocentrals 1+3, all long, the last one longer; postpronotal 1, long; 1 presutural and 1 postsutural intra-alar, 1 postsutural supra-alar; 1 postalar; prealar absent; notopleuron with 2 setae, similar in size; anepisternum with a series of 4 long setae, 3 in the upper mid part and 1 posterior; katepisternals 1+1+1, arranged in an equilateral triangle. Scutellum with 1 long basal and 1 long apical pair of setae.
Legs. Fore femur with a complete row of setae on anterodorsal and posterodorsal surfaces; fore tibia with a long posterior median seta, 1 anterodorsal and 1 dorsal preapical, the anterodorsal very long and twice the length of the dorsal seta, 1 posterior, 1 posteroventral and 1 ventral apical, the last two longer than the dorsal seta and similar in size; mid femur with a row of short setae on basal half of anterodorsal surface, 2 anterior setae on middle third, one row of setae on basal two-thirds, 4–5 well-spaced posteroventral setae on basal two-thirds, and 1 anterodorsal and 1posterior preapical; mid tibia with 1 median posterodorsal and 1 median anteroventral, the latter longer, preapicals on dorsal, anterodorsal and posterodorsal surfaces, apicals on anteroventral, ventral and posteroventral surfaces; hind femur with an anterodorsal and an anteroventral row of setae, more spaced and fine on anteroventral surface; hind tibia with 1 anterior and 1 anterodorsal median setae, inserted at almost the same level, 1 long posterodorsal at apical third, 1 anteroventral and 1 ventral apical.
Wing. Veins bare; veins M and R4+5 parallel at wing-tip; lower calypter about twice the length of the upper one.
Abdomen. Tergite 3 with 1 lateral pair of setae; tergites 4–5 each with a marginal row of setae. Sternite 1 bare. Sternite 5 “U” shaped (Fig. 22).
Terminalia. Cercal plate as in Figs 23–24; with 2 spines and 2 submedian structures on ventral view (Fig. 24); surstylus straight, curved at apex. Aedeagal complex as in Fig. 25.
Female: Body length: 3.3 mm; wing length: 3.2 mm. Similar to male.
Etymology. The name refers to the 2 spines on the ventral surface of the cercal plate.
Discussion. C. setosa runs in Emden’s (1940) key to the C. semifumosa -group, and within this group it runs to C. semifumosa Stein, but C. setosa can be differentiated by the very peculiar male terminalia characters.
Geographical distribution. Angola.
description: Published as part of Couri, Marcia S. & Pont, Adrian C., 2016, Coenosia Meigen (Diptera: Muscidae) from Angola: new species and records, pp. 501-512 in Zootaxa 4103 (6) on pages 508-510, DOI: 10.11646/zootaxa.4103.6.1, http://zenodo.org/record/399676