Amblypsilopus martini, Grichanov, 2022

Grichanov, Igor Ya., 2022, Six new species of Amblypsilopus Bigot (Diptera: Dolichopodidae: Sciapodinae) and a key to species of the Afrotropical mainland, European Journal of Taxonomy 789 (1), pp. 49-80 : 70-73

Amblypsilopus martini sp. nov.

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Fig. 6

Diagnosis

Amblypsilopus martini sp. nov. is very close to A. mufindiensis sp. nov. in habitus, differing distinctly by its mid tarsomeres 3–5 bearing white and black elongate setulae ( Fig. 6F ). The male of Amblypsilopus mufindiensis sp. nov. has only black elongate setulae on the mid tarsomeres 3–5 ( Fig. 5E ).

Etymology

The species is named for one of the collectors of the types, Dr O. Martin (ZMUC).

Material examined

Holotype TANZANIA • ♂; East Uzambara , Amani; alt. 1000 m; 2 Feb. 1977; O. Lomholdt and O. Martin leg.; ZMUC.

Paratypes TANZANIA • 3 ♂♂; same data as for holotype; collection dates 28 Jan., 2 Feb., 6 Feb. 1977; ZMUC .

Description

Male ( Fig. 6A )

Similar to A. mufindiensis sp. nov. in all respects except as noted.

MEASUREMENTS. Body length 6.5–7 mm; antenna length 1.6 mm; wing length 6.5–7 mm; wing width 1.6 mm.

HEAD ( Fig. 6B ). Face shining blue-green, silvery-white pollinose at clypeus, broad, strongly bulging, 1.3 times as wide as high, under antennae 3.6 times as wide as postpedicel; clypeus shining, covered with short white hairs at eye margins mainly, large, as wide as high, separated from eyes; antenna ( Fig. 6C ) black, 1/4 as long as body; postpedicel rounded-triangular, slightly shorter than high (11/13); length (mm) of scape, pedicel, postpedicel, stylus (segments 1 and 2), 0.12/0.07/0.11/0.05/1.3.

THORAX. Scutellum with 1 pair of long and strong bristles, 9–10 marginal and 4–6 dorsal long black setae, distinctly shorter than major bristles.

LEGS. Mostly yellow; mid and hind coxae black; tarsi brownish to black from tip of basitarsi; fore femur ( Fig. 6E ) with anteroventral row of 4 long black setae at base, about 2 times as long as femur height, with almost complete posterior and posteroventral rows of white setae becoming black at apex, 1.5–2 times as long as femur height; mid femur ( Fig. 6G ) with anterior row of white setae on basal ⅔, as long as femur height, with almost complete posterior and posteroventral rows of white setae, 1.5–2 times as long as mid femur height; mid tibia with 2–3 short anterior setae, without ventral setae; mid tarsus simple, with tarsomeres 3–5 with anterior rows of elongate white and black setulae ( Fig. 6F ); hind femur with posterior row of white setae on basal ⅓, 1.5–2 times as long as femur height; femur, tibia and tarsomere (from first to fifth) length ratio (mm): fore leg: 1.69/1.76/1.81/0.59/0.47/0.31/0.18, mid leg: 1.86/3.28/2.98/0.74/0.43/0.32/0.15, hind leg: 2.53/3.62/1.75/0.81/0.51/0.31/0.18.

WING ( Fig. 6D ). Ratio of parts of costa between R 2+3 and R 4+5 to those between R 4+5 and M 1, 3/1; crossvein dm-m weakly sinuate; ratio of crossvein dm-m to apical part of M 1+2 (fork-handle) to apical part of M 4, 109/76/34.

ABDOMEN. Thin, 1.4 times as long as head and thorax combined, mostly shining greenish violet, black posteriorly along sutures; hypopygium ( Fig. 6H ) black, with black appendages; cercus simple, 1.3 times as long as epandrium, broader at base, gradually narrowed towards apex, with long black outer bristles, densely covered with long brownish hairs along entire length ventrally, covered with hairs at base dorsally; surstylus ( Fig. 6I ) elongate, bilobate, looking like trilobate; inner lobe of surstylus with short apical process and short subapical setae; outer lobe of surstylus with short apical spine and short subapical setae, with long mid-dorsal arm bearing 2 strong apical setae; 2 long pedunculate epandrial setae at base of surstylus.

Female

Unknown.

Ecology

According to type specimen labels, imagos inhabit forested area of the Amani Nature Reserve at 1000 m above sea level in the East Usambara Mountains of northeastern Tanzania.

Figures

Fig. 6. Amblypsilopus martini sp. nov., holotype, ♂ (A–G: ZMUC); paratype, ♂ (H–I: ZMUC). A. Habitus. B. Head. C. Antenna.D. Wing. E. Fore femur. F. Mid tarsus. G. Mid femur. H. Hypopygium after maceration, left lateral view. I. Surstylus, lateral view.

Fig. 5. Amblypsilopus mufindiensis sp. nov., holotype, ♂ (ZMUC). A. Habitus. B. Head. C. Antenna. D. Fore femur. E. Mid tarsus. F. Wing. G. Hypopygium after maceration, left lateral view. H. Surstylus, lateral view. I. Cerci, dorsal view.