Rhinoceromyia dubrovskii Grichanov 2024
- Dataset
- Rhinoceromyia, a peculiar new genus of long-legged flies from Guinea (Diptera: Dolichopodidae: Dolichopodinae)
- Rank
- SPECIES
- Published in
- Grichanov, Igor Ya. (2024): Rhinoceromyia, a peculiar new genus of long-legged flies from Guinea (Diptera: Dolichopodidae: Dolichopodinae). Zootaxa 5471 (4): 489-495, DOI: 10.11646/zootaxa.5471.4.8, URL: http://dx.doi.org/10.11646/zootaxa.5471.4.8
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Diptera
- family
- Dolichopodidae
- genus
- Rhinoceromyia
- species
- Rhinoceromyia dubrovskii
biology_ecology
Ecology. The types were collected from a small plot of tropical forest near Bossou village (D. V. Dubrovskiy, pers. comm.).
description
(Figs 1 – 3)
description
Description. Male (Fig. 1 A). Body length 2.7 mm; wing 2.6 x 0.9 mm; antenna 0.9 mm. Head (Fig. 1 B). Distinctly wider than high (13 / 10), with all major setae of head black; vertex flat; upper occiput flat; frons metallic greenish blue, 7 times wider than distance between antennal bases and ocellar tubercle; ocellar tubercle with one pair of strong, long divergent setae and a few short hairs; 1 strong, long outer vertical seta at upper corner of frons on each side at eye margin; 1 fine, short inner vertical seta between outer vertical seta and ocellar tubercle; ommatrichia between facets distinctly longer on lower half of eye; face mostly brown and light brown, metallic greenish blue under antennae; face under antenna 2 times as wide as basal height of postpedicel, slightly convergent towards clypeus; lower half of face (Fig. 1 C) with large conoid horn bearing 2 brushes of golden setae on narrow apex (male secondary sexual characters); clypeus dark brown, covered with white microtrichia; antenna (Fig. 1 D) mainly yellow-brown, brown along dorsal surface, black at apex of postpedicel; scape with rather strong setae dorsally and subtriangular pointed ventral process; pedicel with ring of rather strong setae, with lateral projections; postpedicel swollen at base, narrow distally, with pointed apex, densely covered with long hairs; arista-like stylus basodorsal, somewhat shifted onto outer surface of postpedicel, with short, thick white segment 1 and thin segment 2, flattened at base, mostly black, white on basal third or quarter, with long sparse pubescence; length (mm) of scape, pedicel, postpedicel, arista-like stylus: 0.09 / 0.09 / 0.26 / 0.66; proboscis projected, dark brown; palpus large, rounded, dark brown, with several black setae; postocular setae black, uniserial; upper postocular setae short, with uppermost seta long; lower setae rather strong. Thorax. Black, without distinct spot above notopleuron, with major setae black; weakly shiny greenish violet, weakly pollinose; five pairs of strong dorsocentral bristles decreasing in length anteriorly with several hairs on anterior slope of mesonotum; acrostichals well developed, uniserial between anterior two pairs of dorsocentrals, irregularly biserial between third and fourth pairs of dorsocentrals; 1 long and 1 short notopleural, 1 strong humeral seta and 1 strong posthumeral seta present; proepimeron with 1 strong seta and a few hairs above fore coxa; katepisternum (above mid coxa) with a few fine setae; katatergite (in front of posterior spiracle) without cluster of setulae; scutellum with 2 strong median setae, 2 lateral and 5 – 6 median marginal hairs. Legs. Mostly brownish yellow; fore coxa brown, mid and hind coxae black with brownish apex; mid femur brown at base; hind femur brown in basal half; last 3 segments of tarsi brown; fore and mid coxae with black hairs anteriorly and several setae in apical half; hind coxa with 1 strong external seta above middle; femora without long hairs; fore tibia with 1 anterodorsal seta at middle; fore tarsus simple, fore basitarsus with 2 short basiventral setae; mid femur with 1 strong anterior seta and 1 strong posteroventral preapical seta in addition to fine terminal posteroventral seta; mid tibia with 2 pairs of anterodorsal and posterodorsal setae at base and at middle, 1 anteroventral at middle and 5 apical setae; mid tarsus simple; hind femur with strong anterior seta at about distal 2 / 5 of femur; hind tibia simple, with 2 pairs of anterodorsal and posterodorsal setae at 1 / 3 and 2 / 3, 1 anteroventral, 2 apical setae; hind basitarsus with 1 basiventral seta and small posterior basal denticle; femur, tibia and tarsomere (from first to fifth) length (mm): fore leg: 0.73 / 0.69 / 0.38 / 0.13 / 0.12 / 0.09 / 0.11, mid leg: 0.96 / 1.07 / 0.43 / 0.22 / 0.15 / 0.09 / 0.09, hind leg: 1.04 / 1.06 / 0.31 / 0.37 / 0.18 / 0.12 / 0.13. Wing (Fig. 1 E). Mostly brown, with brown veins, with 5 transparent spots in basal half and 5 transparent spots in distal half; lengths of costa between R 2 + 3 and R 4 + 5 and between R 4 + 5 and M 1 (in mm), 39 / 22; R 4 + 5 and M 1 subparallel in distal part of wing; M 1 almost straight; dm-m slightly convex; ratio of dm-m to distal part of M 4, 28 / 19; anal vein distinct, anal lobe developed, anal angle obtuse; calypter brown, with black setae; halter brown-black. Abdomen. Black, grey pollinose, with black hairs and marginal setae; sterna 5 – 6 weakly sclerotized; segment 6 small, with several fine setae; segment 7 reduced to narrow ring, bare; segment 8 light brown, rounded, covered with sparse black setae; hypopygium (Fig. 1 F) mostly light brown; epandrium (Fig. 2 A) cylindrical, as long as tergites 4 – 6 combined, more than 2 times longer than high, with left basolateral foramen, covered with white microtrichia; hypandrium narrow, simple, reaching apex of epandrium, fused with epandrium at base; phallus long and thin, concealed; distoventral epandrial lobe (Fig. 2 B) long, with 1 dorsal seta at middle and 2 ventral setae at apex; postgonite broad and parallel-sided to apex (dorsal view); surstylus small, straight, with 2 short finger-like lobes; ventral lobe 2 times longer than dorsal one; both lobes bearing a few short setae at apex; cercus (Fig. 2 C) brown-black, secondarily segmented, with distal section of cercus articulated with basal section; epandrium with distodorsal lobe supporting distal section of cercus; basal section of cercus covered with white dorsal cilia; distal section of cercus (Fig. 2 D) rounded, with white cilia and 4 ventral and 1 dorsal strong, black marginal setae. Female (Fig. 3). Similar to male except lacking male secondary sexual characters. Body length 2.7 mm, wing 2.5 mm, antenna 0.7 mm. Face (Fig. 3 B) nearly parallel-sided, with bulging clypeus; face and clypeus metallic greenish black, without horn; antenna (Fig. 3 A) with postpedicel subtriangular, swollen at base, angular at apex, slightly longer than high (16 / 14); arista-like stylus with short thick white segment 1 and thin black segment 2; abdomen with 6 visible segments; terga 9 + 10 (Fig. 3 C) divided medially into two short hemitergites, each bearing 5 thick spines; cercus yellow, elongate, with a few long white setae; anal plate subtriangular, covered with numerous tubercles.
distribution
Distribution. Guinea: Nzérékoré Province, Lola Prefecture.
etymology
Etymology. The species is named after the collector of the type material, Dmitriy V. Dubrovskiy, Moscow, Russia.
materials_examined
Type material. HOLOTYPE ♂, labelled: “ Guinea: Nzérékoré prov., subpref. Lola, Bossou vill., 7.64452 ° N, 8.50187 ° W, 2 – 5 August 2023, D. Dubrovskiy leg. ” (ZIN). Holotype in good condition (male with terminalia dissected and stored in glycerin in microvial pinned with the specimen). PARATYPES: 1 ♂, 1 ♀, same data as holotype (dried and mounted on pins; ZIN).