Angustithorax, 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

Taxon classification Animalia Orthoptera Phaneropteridae

Genus Angustithorax gen. n.

Type species.

Angustithorax spiniger sp. n., here designated.

Description.

Head and antennae: fastigium of vertex narrow and pointed, not contiguous with the fastigium of frons, much narrower than the first antennal segment (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 a bit narrower than the eye. Face with fronto-genal carinae below antennae (Fig. 35). Thorax: pronotum as long as high, narrow and compressed, mainly anteriorly, well-developed humeral excision. Legs: upper and lower margins of legs densely covered by hairs. Fore coxae armed with a long and flattened spine (Fig. 36), fore and mid femora laterally compressed (Fig. 34); fore femora with ventral spines, fore tibiae with ventral spines, closed tympanum on inner side and open on outer side. Mid femora and tibiae with ventral spines. Hind femora with ventral spines, hind tibiae with ventral spines. Tegmina well developed, slightly shiny and shorter than hind wings (Fig. 32). Abdomen: male tenth abdominal tergite unmodified, sub-genital plate without styli, very long, upward curved and pointed; cerci are also very long and in-curved, decussate below the sub-genital plate3 (Figs 37-38).

Diagnosis.

This genus is vaguely similar to Miltinobates Sjöstedt, 1902, mainly in the shape of fastigium of vertex and in the sub-genital plate; however, Miltinobates has longer and rounded legs, the medial field of fore wings has clear parallel veins, its sub-genital plate is wider and its size is much bigger.

Etymology.

From Latin: angustus = narrow, thorax = cuirass; because of its very slender pronotum and the entire slender habitus.