Angustithorax spiniger, Massa, Bruno, 2015

Massa, Bruno, 2015, New genera, species and records of Phaneropterinae (Orthoptera, Phaneropteridae) from sub-Saharan Africa, ZooKeys 472, pp. 77-102 : 83-85

Taxon classification Animalia Orthoptera Phaneropteridae

Angustithorax spiniger sp. n. Figs 32-38

Material examined and depository.

Democratic Republic of Congo, Lubumbashi (11°42'1.06"S, 27°31'57.07"E) 3.II.1968 (♂ holotype), T. De Stefani (MRT).

General habitus and colour.

Yellow-green. The stridulatory area of left tegmen is brownish.

Description.

Male. Head and antennae: fastigium of vertex narrow and pointed, not contiguous with the fastigium of frons, much narrower than the scapus, not furrowed above (Figs 34-35). Eyes round, moderately prominent (Figs 33-35), placed behind antennae. The scapus is placed within an area with raised margins and is just narrower than the eye. Face with sparse hairs, narrow with fronto-genal carinae below antennae, forming a small triangular area (Fig. 35). Thorax: pronotum longer than high, without lateral carinae, much narrow and compressed, mainly anteriorly, surface shiny, well developed humeral excision on the lateral lobes (Fig. 33). Anterior margin of pronotum straight, posterior margin rounded, pronotum lobes rounded on posterior margins, sinuous on lower margins. Legs: upper and ventral borders of legs densely covered by hairs (Fig. 35). Fore coxae are armed with a long and flattened spine (Fig. 36), fore and mid femora are laterally compressed (Fig. 34); fore tibiae have conchate tympanum on inner side and open on outer side; fore femora have 6 inner ventral spines and 2 spines on outer margin, fore tibiae have 6 inner and 4 outer spines on ventral margins, plus 1 spur on each side, upper margin is furrowed and apically unarmed; mid femora have 8 spines on outer ventral margin, mid tibiae have 9 outer and 6 inner spines on ventral margins, plus 1 spur on each side, upper margin is apically unarmed; hind femora have 7 outer and 2 inner ventral spines, hind tibiae have many ventral and dorsal spines plus 2 spurs on inner margin and 3 spurs on outer margin. Tegmina are well developed, slightly shiny and shorter than hind wings, medial field has only crossed veinlets, in the rest of tegmina veinlets delimit small hexagons (Fig. 32). The stridulatory area of left tegmen is comparatively long (Fig. 34). Abdomen: male tenth abdominal tergite is unmodified, styli are absent, sub-genital plate is very long, upward curved and pointed. The cerci are also very long and in-curved, decussate and apically pointed with a black tip (Figs 37-38). The sub-genital plate and cerci are covered by hairs.

Female. Unknown.

Measurements.

Body length: 23.3; pronotum length: 5.9; pronotum height: 4.9; hind femur: 20.2; tegmina: 37.2.

Diagnosis.

Very slender body, fore coxae are armed with a long and flattened spine, cerci long and decussate.

Etymology.

From Latin: spiniger = thorny, after the long and stout spine on the fore coxae.

Distribution.

Only known from the type locality: Lubumbashi (Democratic Republic of Congo).