Eucoryphus

Pusch, Martina H. E., Stark, Andreas & Pollet, Marc, 2020, Description of a new Eucoryphus species from the island of Corsica, France (Diptera: Dolichopodidae, Hydrophorinae), Zootaxa 4816 (4), pp. 527-540 : 534

Key to males of Eucoryphus

1 Leg I with tarsomeres concolorous, brown or yellowish brown; tarsomere 3 roughly as long as broad, about half as long as tarsomere 4, with a dense comb of posterior setae ( Figs 9C, D ); scape of antenna visible, postpedicel bifurcate ( Fig. 10 ), with acute upper and lower apex (European Alps)................................................................ 2

- Leg I with tarsomere 1 whitish-yellow, with only tip slightly darkened; tarsomeres 2–4 brownish and of equal length, about as long as wide; tarsomeres 3–4 with pairs of hook-like setae as long as depth of tarsus ( Fig. 9B ); scape covered by strongly hypertrophied, reniform pedicel, with blunt upper and lower apex; postpedicel barge- or bean-shaped with tuft of 7–8 strong setae roughly as long as postpedicel ( Fig. 4 ) (mountains of southern Corsica).................. E. piscariviverus sp. nov.

2 Comb of setae on tarsomeres 2–3 of leg I of equal length, curled backwards, setae only slightly longer than depth of tarsal segments ( Fig. 9C ); ventral extension of postpedicel only with very short apical setulae ( Fig. 10 ).......... E. coeruleus Becker

- Comb of setae on tarsomeres 2–3 of leg I of different lengths, longest setae at middle of comb, more than twice as long as depth of tarsal segments ( Fig. 9D ); ventral extension of postpedicel ( Parent 1938, fig. 457) with long apical setulae.................................................................................................... E. brunneri Mik

Figures

FIGURE 4. Eucoryphus piscariviverus sp. nov., holotype male. A. Head in lateral view; B. Head in frontolateral view (photographs by A. Stark).

FIGURE 9. Tip of abdomen of female of Eucoryphus piscariviverus sp. nov. and male tarsus of leg I of Eucoryphus spp. (B–D). A. Tip of abdomen, paratype female, left laterocaudal view; B. Holotype male of Eucoryphus piscariviverus sp. nov., right lateral view; C. Eucoryphus coeruleus Becker; D. Eucoryphus brunneri Mik (photographs by A. Stark).

FIGURE 10. Male head of Eucoryphus coeruleus Becker in frontal view (Allgäu, Bavaria, leg. D. Doczkal) (photograph by A. Stark).