Parathalassiinae , Cumming & Brooks 2019
Creators: name: Brooks, Scott E.
name: Cumming, Jeffrey M.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae

description: Key to male Parathalassiinae in the Australasian Region
Ten species are currently known from the region, although additional species undoubtedly occur. Since a number of species are known only from males, female diagnostic features as they are understood, are summarized in the generic diagnoses above.
1 Wing with vein M 2 present; cell dm usually present (Fig. 52), but sometimes cell dm and crossvein dm-m absent (Shamshev & Grootaert 2005, fig. 12)................................................................................ 5
- Wing with vein M 2, cell dm and crossvein dm-m absent (Fig. 22)............................ Chimerothalassius … 2
2 Palpus elongate and gradually enlarged apically (Figs 12, 14) (New Zealand)..................................... 3
- Palpus abruptly capitate apically, narrow basally (Figs 19, 27, 28) (New Caledonia)................................ 4
3 Head and thorax primarily silver-grey pruinose; mesonotal setae rather short and weak; legs pale yellowish; palpus largely yellow (Fig. 12); genal setae weak and pale (Fig. 12); hypopygium with phallus tip funnel-shaped (Shamshev & Grootaert 2002, fig. 20)................................................................... C. ismayi Shamshev & Grootaert
- Head and thorax primarily dark brown-grey pruinose; mesonotal setae strong; legs brownish; palpus dark brown (Figs 14, 15); genal setae strong and dark (Fig. 14); hypopygium with phallus tip not expanded (Fig. 16).......... C. marshalli sp. nov.
4 Palpus brown (Fig. 19); antennal postpedicel with very short narrow tip (Fig. 20); mesonotum with acrostichal setae absent and dorsocentral setae strong; hypopygium with enlarged hypoproct (Figs 23–25)...................... C. riparius sp. nov.
- Palpus white (Figs 27, 28); antennal postpedicel with long narrow tip (Fig. 27); mesonotum with acrostichal and dorsocentral setae short and weak; hypopygium with short hypoproct (Fig. 33)............................... C. sinclairi sp. nov.
5 Face narrow, about width of anterior ocellus; arista-like stylus lengthened, at least 5X as long as postpedicel (as in Fig. 35; Shamshev & Grootaert 2005, figs 1, 2)...................................................... Eothalassius … 6
- Face broad, about width of combined antennal bases or wider (Fig. 41); arista-like stylus shorter, about 2X as long as postpedicel (Figs 40, 51)....................................................................... Microphorella … 7
6 Wing with cell dm and crossvein dm-m present (as in Fig. 36; Shamshev & Grootaert 2005, fig. 25)............................................................................................ E. gracilis Shamshev & Grootaert
- Wing with cell dm and crossvein dm-m absent (Shamshev & Grootaert 2005, fig. 12)..................................................................................................... E. platypalpus Shamshev & Grootaert
7 Body and legs with pale setation; head and thorax pale grey pollinose; palpus broadly clavate, flattened and pale (New Guinea).................................................................... M. papuana Shamshev & Grootaert
- Body and legs with black setation; head and thorax dark brownish or dark grey pollinose (Figs 39–42, 49–51); palpus narrowly ovate, dark brown (Figs 40, 41, 51) (Australia)............................................................. 8
8 Hypopygium with phallus elongate, tightly curled (Figs 53–55)................................. M. viticula sp. nov.
- Hypopygium with phallus relatively short, not tightly curled (Figs 43–45, 47, 48).................................. 9
9 Hypopygium with phallus tip bent and brush-like (Figs 47, 48)..................................... M. iota Colless
- Hypopygium with phallus tip straight and tubular (Figs 44, 45)................................. M. bungle sp. nov.
description: Published as part of Brooks, Scott E. & Cumming, Jeffrey M., 2022, New Australasian Parathalassiinae (Diptera: Dolichopodidae sensu lato), pp. 521-543 in Zootaxa 5188 (6) on pages 541-542, DOI: 10.11646/zootaxa.5188.6.2, http://zenodo.org/record/7103618