Thinophilus manambato, Grichanov, 2023

Grichanov, Igor Ya., 2023, A review of the Afrotropical Thinophilus Wahlberg, 1844 (Diptera: Dolichopodidae), with the descriptions of ten new species, European Journal of Taxonomy 878, pp. 1-52 : 34-36

Thinophilus manambato sp. nov.

urn:lsid:zoobank.org:act:C2866EE5-976A-4775-859C-BBD06301A798

Fig. 11

Diagnosis

Thinophilus manambato sp. nov. is close in habitus to T. capensis , T. cataractae sp. nov. and T. fluvialis sp. nov. (see key above), differing in fore coxa with mainly white setae, with at most 2–3 black apical bristles; mid coxa with white setae and one black bristle. The last three species have fore coxa with mainly black bristles and setae; mid coxa with black bristle and setae. The hypopygium of T. manambato is similar to that in T. fluvialis , but the surstylus of the latter is thin (lateral view), bearing about seven short spine-like apicoventral setae; the surstylus of T. manambato is broad (lateral view), with simple ventral and apical setae.

Etymology

The specific epithet refers to the Manambato village at the Lake Rasoabe near Toamasina city, where the type was collected.

Material examined

Holotype MADAGASCAR • ♂; “ Toamasina Region, Manambato ; 18.75° S, 49.15° E; 24–30 Nov. 2012; A.Medvedev leg.”; ZMUM.

Paratype MADAGASCAR • 1 ♂; same collection data as for holotype; ZMUM .

Description

Male ( Fig. 11A )

MEASUREMENTS. Body length 4.3 mm; antenna length 0.9 mm; wing length 3.7 mm; wing width 1.2 mm.

HEAD ( Fig. 11B ). Postcranium blackish blue, white pollinose; frons copper green, with violet spot under ocellar tubercle; face greenish blue; clypeus blackish blue, grey pollinose; face under antennae 1.7 × as wide as height of postpedicel; clypeus about ⅓ as long as epistoma, about 2 × as wide as long; palp yellow, bearing black bristly hairs; proboscis dark brown; 2 diverging ocellars; 1 vertical, 1 postvertical, much stronger and longer than, and not in row with upper postoculars; upper postoculars uniseriate, black; middle and lower postoculars multiseriate, white, long; antennal scape, pedicel and postpedicel blackish dorsally, yellow ventrally ( Fig. 11C ); scape with scale-like inner projection; pedicel simple, convex on inner side; postpedicel apically browned, rounded, with short pubescence, slightly higher than long (15/11); arista-like stylus dorsal, black and thick basally, whitish and thin distally, shortly pubescent; length ratio of scape to pedicel to postpedicel to stylus, 0.1/0.1/0.11/0.7.

THORAX. Metallic, grey dusted; mesonotum blue-green; pleura bluish black; no acrostichals; 6 dorsocentrals decreasing in length anteriorly; scutellum with 2 strong marginals and 2 minute laterals; 7–8 upper and 7–8 lower, white propleural bristles of different length.

LEGS. Fore coxa yellow; mid and hind coxae black, yellow at apex; legs mostly yellow; tarsi gradually darkened from tip of basitarsus.

FORE LEG. Coxa with mainly white setae, with at most 2–3 black apical bristles; femur simple, with some short fine ventral setae at base; tibia bearing 3 anterodorsal, 2 posterodorsal, 2–3 ventral and 3–4 apical short bristles, glabrous anteriorly on distal ⅓; tarsal segments 1–4 ventrally with short simple setulae; segments 3–5 with elongate apicodorsal setulae; segment 5 inconspicuously widened; length of femur, tibia and tarsal segments (in mm): 1.24/1.16/0.51/0.25/0.19/0.13/0.17.

MID LEG. Coxa with white setae and 1 black bristle; femur with anteroventral row of short white hairs on basal half; 1 preapical posteroventral; tibia bearing 2 anterodorsal; 2 posterodorsal, 2 ventral short bristles, 4 apicals; tarsal segments 1–4 ventrally with short setae; segment 5 inconspicuously flattened dorso-ventrally and widened; length of femur, tibia and tarsal segments (in mm): 1.44/1.52/0.88/0.35/ 0.24/0.16/0.17.

HIND LEG. Coxa with 1 black exterior bristle; femur ventrally without remarkable setae; 6–7 anterodorsal bristles; tibia bearing 4 anterodorsal, 4 posterodorsal bristles, 3 short ventrals, 4 apicals; tarsal segments 1–4 ventrally with short setae; segment 5 with elongate apicodorsal setulae; segment 5 inconspicuously widened; length of femur, tibia and tarsal segments (in mm): 1.68/1.9/0.61/0.45/0.28/0.21/0.2.

WING ( Fig. 11D ). Hyaline, without darker shades; veins yellow-brown, more yellowish at base; distal part of M 1+2 convex; tip of R 4+5 parallel with M 1+2; ratio of part of costa between R 2+3 and R 4+5 to that between R 4+5 and M 1+2 (in mm), 0.40/0.26; crossvein dm-m straight; ratio of dm-m to distal part of M 4, 0.33/0.35; anal vein distinct; halter yellow; lower calypter yellow, with white cilia.

ABDOMEN. Blackish violet, grey dusted; tergite 6 shining blue; setae and hind-marginal bristles on tergites black, short; sternites with short white setae. Hypopygium ( Fig. 11E–G ) black with black appendages; epandrial lobe reduced; hypandrium fused with epandrium, short and broad, apically concave; phallosoma broad, narrow at apex, not reaching apex of surstyli; phallus short, simple, apically broad, hidden under phallosoma; surstylus straight and broad (lateral view), with 3 long dorsal bristles and several short and long ventral and apical setae ( Fig. 11F ); cerci dorsally adjoined, leaflike, with long marginal bristles ( Fig. 11G ).

Female

Unknown.

Figures

Fig. 11. Thinophilus manambato sp. nov. A–D. Holotype, ♂ (ZMUM). E–G. Paratype, ♂ (ZMUM). A. Habitus. B. Head. C. Antenna. D. Wing. E. Hypopygium after maceration, lateral view. F. Distal appendages of hypopygium after maceration, lateral view. G. Distal appendages of hypopygium after maceration, ventral view.