Ewanella Naskrecki 1994

Genus Ewanella Naskrecki, 1994

Type species: E. longipes Naskrecki, 1994 (South Africa: Richtersveld).

Remarks: This genus differs from the most similar genus Aprosphylus Pictet, 1888 in the characters previously indicated by Naskrecki (smaller size, less spotted coloration of wings, shorter pronotum), but mainly in: the almost complete absence of a hind lobe of the pronotum (which covers small basal areas of the tegmina in Aprosphylus); characteristic tegmina distinctly narrowing in the distal half (in Aprosphylus, tegmina with the distal half and proximal half of almost equal width, except for a widened region of the male stridulatory apparatus); a distinctly inflated proximal half of the middle tibiae; the presence of 2 pairs of small spines at the apex of the hind femora (in Aprosphylus, these femora have only a ventral pair of apical spines); and a more or less truncate or notched hind part of the female genital plate (in Aprosphylus, this plate is triangular).

Species included: Type species and E. breviuscula sp. n.

Key to species of Ewanella

1 Male tegmina longer (ratio tegmen/hind femur about 0.95); mirror in stridulatory apparatus of lower (right) tegmen of male with convex lateral edge and narrower distal part (Fig. 1: m); stridulatory vein of upper (left) tegmen of male with about 46 stridulatory teeth; male cerci with longer hook situated near cercal apex (Fig. 2); male genital plate with deep apical notch (Fig. 3). Female genital plate with almost truncate hind part (Fig. 4)............................. E. longipes Naskrecki, 1994

– Male tegmina shorter (ratio tegmen /hind femur 0.75–0.8); mirror in stridulatory apparatus of lower (right) tegmen of male with straight lateral edge and wider distal part (Fig. 5: m); stridulatory vein of upper (left) tegmen of male with 37–41 stridulatory teeth; male cerci with shorter hook situated somewhat farther from cercal apex (Fig. 6); male genital plate with less deep apical notch (Fig. 7). Female genital plate distally rounded and with distinct apical notch (Fig. 8)............................................................................................................................... E. breviuscula sp. n.