Mangrovomyia Grichanov et Gilasian, 2023

Grichanov, Igor Ya. & Gilasian, Ebrahim, 2023, Mangrovomyia, a new genus of long-legged flies from Iranian mangroves (Diptera: Dolichopodidae: Hydrophorinae), Zootaxa 5239 (3), pp. 395-407 : 396

Mangrovomyia Grichanov et Gilasian gen. nov.

Type species. Mangrovomyia naserzadehae Grichanov et Gilasian sp. nov., here designated.

Etymology. Mangrovomyia is formed from the Caribbean “mangrow” (mangrove) and Ancient Greek “μυῖα” (fly). The gender is feminine.

Diagnosis. This genus is readily distinguished from other hydrophorines by the very short and thick aristalike stylus; the trapezoidal postpedicel with oblique transverse furrow; the frons, face and clypeus covered with numerous setae, and the anterior half of mesonotum covered with field of numerous short setae and devoid of strong bristles.

Description. Male and female (generic description based on two species and emphasizes characters considered of generic importance). Body length 5.3–5.6 mm, wing 3.9–4.7 x 1.2–1.4 mm, antenna 0.6 mm. Head. Slightly wider than high in anterior view; occiput flat; upper occiput slightly concave; pair of distinct converging postvertical setae on dorsal postcranium, not in line with postocular setae; pair of strong verticals at level of anterior ocellus and diverging ocellar setae present; face and clypeus wide, clypeus distinctly tectiform in both sexes; eye facets uniform; antenna with scape bare; pedicel simple; postpedicel trapezoidal, bare, with oblique transverse furrow, with apical or strictly preapical arista-like stylus comprised of 2 short aristomeres. Thorax. Mesonotum distinctly flattened or concave posteriorly, covered irregularly with numerous short setae in addition to major bristles; acrostichal setae biserial; at least 5 dorsocentrals present, decreasing in size anteriorly; 1 strong postalar, 1 strong supra-alar, no distinct sutural, 1 strong humeral, 1 strong posthumeral, 2 notopleurals; scutellum with 2 pairs of strong marginal bristles and several short setae dorsally on disc; proepisternum with some simple setae. Legs. Coxae without strong bristles; fore femur swollen, with short anteroventral bristles; fore tibia with apical spines; mid and hind femora with 2 or more strong anterodorsal preapical bristles (hind femur without preapical bristles in M. mofidii sp. nov.); mid and hind tibiae with strong bristles. Wing. Relatively short and narrow; membrane hyaline; R 1 reaching costa behind mid-length of wing; R 2+3 ending in costa before wing apex; R 2+3 and R 4+5 weakly convex, diverging from base; M 1 straight, weakly converging apically with R 4+5, joining costa posteriad of apex; crossvein dm-m straight, shorter than apical part of M 4; anal lobe wide. Male abdomen. Tergites 1–5 wide and rounded; sternites 2–5 well developed; tergite 6 bare; segments 7 and 8 reduced; epandrium short, subrectangular; epandrial foramen basal in position; hypandrium fused to epandrium; phallus simple; epandrial lobe and surstylus well developed; cercus short. Female abdomen with tergites 1–5 wide and rounded, oviscapt with tergites 9+10 divided medially into two hemitergites, each bearing 6 thick spines.