Shamshevia Grichanov, 2012

Grichanov, Igor Ya., 2012, Shamshevia, a new genus of long-legged flies from Namibia (Diptera: Dolichopodidae: Diaphorinae), Journal of Natural History 46 (9 - 10), pp. 557-563 : 558-561

publication ID	https://doi.org/ 10.1080/00222933.2011.651631
DOI	https://doi.org/10.5281/zenodo.10536929
persistent identifier	https://treatment.plazi.org/id/CE1887B0-D127-8413-FE27-FE4C6630FD30
treatment provided by	Felipe
scientific name	Shamshevia Grichanov
status	gen. nov.

Treatment

Genus Shamshevia Grichanov View in CoL , gen. nov.

( Figures 1–5 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 )

Etymology

The genus is named after the Russian dipterist Dr Igor Shamshev (St Petersburg). The gender is feminine.

Type species

Shamshevia hoanibensis Grichanov , sp. nov.

Diagnosis

The generic diagnosis is based on a single species, and notes characters considered to be of generic importance; however, a complete species description is also provided below.

The following character states place Shamshevia in the subfamily Diaphorinae (see Yang et al. 2006, 2011). Short postvertical bristle; vertical bristle located just behind lateral ocellus. Mid and hind femora without anterior preapical bristle; hind coxa with one seta at upper third. Hypopygium small and encapsulated; hypandrium reduced; epandrial lobe well developed; surstylus branched; one subepandrial process, postgonite distinct. The following characters bring the new genus closer to Xanthochlorus . Thorax and / or abdomen mainly yellow with yellow bristles; mesonotum with flat mid-posterior slope. Having yellow–brown body and very long antennal postpedicel (possibly male secondary sexual characters), Shamshevia is also close to diaphorine genus Dactylonotus , differing from the latter in peculiar characters of male antenna, wing and genitalia.

The following character states distinguish Shamshevia from most diaphorine genera. Body and wing length less than 2 mm (versus 3 mm and longer in Dactylonotus ); body and legs with all bristles white (versus at least some bristles black). Antennal scape with long pointed ventral process (versus simple); pedicel with short visible base, with long concealed conus reaching basal third of postpedicel (versus pedicel without conus, but with finger-like dorsal projection in Dactylonotus ); postpedicel flat, long, band-like, with pointed apex (versus postpedicel usually about as long as high, often with indistinct apex, but very long in Dactylonotus ). Arista-like stylus basodorsal, with long segment 1 and short segment 2 (versus stylus apical or subapical, with short segment 1 and long segment 2). Palpus large, ovate, white, with short apical seta (versus palpus small, rounded, dark, with strong apical seta). Thorax entirely dark brown. Wing with R 4+5 and M 1+2 subparallel in middle part and slightly divergent on apical part of wing (versus subparallel on apical half of wing); M 1+2 broadly curved anteriorly in apical half (versus nearly straight or slightly sinuate); dm-cu faint, located at wing base, at level of r-m (versus dm-cu distinct, located at middle of wing, but often shifted basally in Asyndetus Loew and absent in Cryptophleps Lichtwardt ). Abdomen in Shamshevia has hypandrium weakly sclerotized, fused with epandrium, simple, triangular (ventral aspect); parameral sheath long, narrow, simple, cylindrical; postgonite exposed, reaching apex of surstylus.

The complex set of characters supports the generic status of Shamshevia .