Eurycorypha spinulosa Karsch, 1889

Massa, Bruno, 2017, New genera, species and records of Afrotropical Phaneropterinae (Orthoptera, Tettigoniidae) preserved at the Royal Belgian Institute of Natural Sciences, Bruxelles, Zootaxa 4358 (3), pp. 401-429 : 407

Eurycorypha spinulosa Karsch, 1889

Figs 4A–4D

KarSch, 1889 (1888). Berlin Ent. Z. 32: 455.

Material examined. Cameroon, Mukonje Farm, R. Rohde (2♂, 3♀) ; Cameroon, Mt. Koupé 31.I–8.II.1983, J. van Stalle (1♂) ; Gabon, N’Toum 29.IX.1985 (light), A. Pauly (1♂) ( RBINS) .

Measurements. Males. Body length: 18.0–18.5; length of pronotum: 4.0–4.1; height of pronotum: 3.6–3.8; length hind femur: 11.8–12.1; length of hind tibia: 13.5–14.0; length of tegmina: 22.5–23.0; width of tegmina: 7.0– 7.4.

Characters of the male. The description of the male by Karsch (1891) is too short, further characters are below reported. Small species, fastigium of vertex wide, ca. 2 times as wide as scapus. Fronto-genal carinae welldeveloped. Antennae as long as body. Pronotum flat, with slightly concave anterior margin and rounded posterior margin. Lateral carinae distinct, humeral excision well-developed, integuments smooth. Tegmina about 3.0 times longer than broad, rounded at the tip; differently from most species of the genus Eurycorypha , second pairs of wings are nearly as long as tegmina. Stridulatory file 1.2 mm long, curved, with ca. 80 evenly spaced teeth, central higher than lateral ones ( Fig. 4A ). 4 spines on inner ventral margin and 2 on outer ventral margin, fore and mid femurs without dorsal spines. Fore femur with 3 spines on inner ventral margin, mid femur with 4 outer ventral spines, hind femur with 9 spines on outer ventral margin and 3 on inner ventral margin. Hind tibia with 3 apical spurs on each side. Last abdominal tergite modified, enlarged and divided into two down-curved processes. Cerci up-curved, stout at their base with a fine black tip ( Figs 4B, 4C ); before the tip a second ramification of cerci branches off: the main base of cerci is 1.7 mm long, while the second branch is 2.6 mm long, out-curved and finely tipped ( Figs 4B, 4C, 4D ). Subgenital plate concave, long, without styli.

Distribution. Known from Kimpoko ( Zaire), Democratic Republic of Congo, Cameroon, Fernando Poo ( Guinea) ( Karsch 1889, 1890, 1891, Griffini 1906, 1908, Sjöstedt 1912) and here reported from Gabon.

Figures

FIGURE 4. Eurycorypha spinulosa KarSch, 1889. A) Stridulatory file below the left tegmen of the male. B) LaSt tergite and cerci of the male. C) Cerci of the male from above.D) Lateral view of cerci of the male.