Thinophilus saegeri Grichanov 2023, sp. nov.
Creators: name: Grichanov, Igor Ya.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Thinophilus
Thinophilus saegeri

description: Thinophilus saegeri sp. nov.
urn:lsid:zoobank.org:act: 983B1BFE-4584-431B-BA98-C9CB86C0C58F
Fig. 8
Diagnosis
Thinophilus saegeri sp. nov. is very close to the Palaearctic Thinophilus versutus, differing in the following characters: palp yellow; antenna black; arista-like stylus dorsal; upper and lower propleural bristles white; wing without distinct dark spots; ratio of dm-m to distal part of M 4, 0.2/0.25; hypopygium with black cercus. Thinophilus versutus male has the following characters: palp black; antenna brown-black, yellow ventrally; arista-like stylus apical; upper and lower propleural bristles black; wing with distinct dark spots on dm-m and M 1+2; dm-m about half as long as distal part of M 4; hypopygium with yellow cercus (Parent 1938; Negrobov 1979).
Thinophilus saegeri sp. nov. is also close to the Thinophilus cilifemoratus complex, differing in the following characters: femora mostly brown; coxae with black setae and bristles; fore femur with few short black setae at base, half as long as femur height; hypopygium with black cercus. Thinophilus cilifemoratus male has the following characters: femora yellow; coxae with yellow setae and bristles; fore femur with partly doubled ventral setae, longer than femur height; hypopygium with yellow cercus (Becker 1902; Negrobov 1979; Grootaert & Meuffels 1998).
Etymology
The specific epithet is dedicated to the holotype collector, the Belgian entomologist Dr Henry De Saeger (RMCA).
Material examined
Holotype DR CONGO • ♂; “Congo Belge; P.N.G. [Parc National Garamba]; Miss. H. De Saeger; II/hd/4; 23 Mar. 1951; H. De Saeger leg.; 1444”; RMCA.
Description
Male (Fig. 8A)
MEASUREMENTS. Body length 2.2 mm; antenna length 0.7 mm; wing length 2.2 mm; wing width 0.8 mm.
HEAD (Fig. 8D). Postcranium and frons, face and clypeus bluish black, grey pollinose; face under antennae 1.8 × as wide as height of postpedicel; clypeus half as long as epistoma, as wide as long; palp yellow, bearing black bristly hairs; proboscis black; 2 diverging ocellars; 1 vertical, 1 postvertical (all broken), not in row with upper postoculars; upper postoculars uniseriate, black; middle and lower postoculars biseriate, white, relatively long; antenna black (Fig. 8B); scape small, with short inner projection; pedicel simple, convex on inner side; postpedicel rounded, with short pubescence, higher than long (10/7); arista-like stylus dorsal, black, thick basally, thin distally, pubescent; length ratio of scape to pedicel to postpedicel to stylus, 0.08/0.06/0.07/0.56.
THORAX. Bluish black; no acrostichals; 4 dorsocentrals of almost equal length; scutellum with 2 strong marginals; no laterals; few white upper and lower propleural bristles of different length.
LEGS. Fore coxa brownish yellow; mid and hind coxae black; legs mostly brownish yellow; femora darker and tibiae lighter; tarsi brown-black from tip of basitarsus.
FORE LEG. Coxa with black setae and bristles; femur simple, with few short black setae at base, half as long as femur height; tibia and tarsus simple; tibia with 1 anterodorsal, 3 short apicals; segment 5 weakly widened; length of femur, tibia and tarsal segments (in mm): 0.73/0.71/0.33/0.18/0.15/0.11/0.10.
MID LEG. Coxa with black setae; femur with anteroventral row of dark setae, at most half as long as femur height, and few posteroventrals at apex; tibia bearing 1 anterodorsal and 2 posterodorsal bristles, 3 apicals; tarsal segment 5 inconspicuously thickened; length of femur, tibia and tarsal segments (in mm): 0.83/0.95/0.49/0.23/0.18/0.1/0.11.
HIND LEG. Coxa with 1 black exterior bristle; femur with anteroventral row of setae, ⅓ × as long as femur height; tibia with rather short setae; segments 3–5 broken; length of femur, tibia and tarsal segments (in mm): 0.96/0.97/0.28/0.28/-/-/-.
WING (Fig. 8C). Fumose, without darker shades; veins yellow-brown; distal part of M 1+2 straight; R 4+5 almost 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), 0.36/0.17; crossvein dm-m straight; ratio of dm-m to distal part of M 4, 0.2/0.25; anal vein distinct; halter with yellow stem and brown knob; lower calypter dirty yellow, with white cilia.
ABDOMEN (Fig. 8E). Black, grey pollinose; setae and hind-marginal bristles on tergites black, short; sternites with short setae. Hypopygium (lost during maceration) black, cercus black, short, as long as tergite 5, covered with light setae.
Female
Unknown.
description: Published as part of Grichanov, Igor Ya., 2023, A review of the Afrotropical Thinophilus Wahlberg, 1844 (Diptera: Dolichopodidae), with the descriptions of ten new species, pp. 1-52 in European Journal of Taxonomy 878 on pages 27-29, DOI: 10.5852/ejt.2023.878.2153, http://zenodo.org/record/8110550