Eurycorypha divertata, Hemp, 2017

Hemp, Claudia, 2017, New Eurycorypha species (Orthoptera: Tettigonoidea: Phaneropteridae; Phaneropterinae from East Africa, Zootaxa 4358 (3), pp. 471-493 : 477-479

Eurycorypha divertata n. sp.

( Figs. 8 , 9 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:500278

Holotype Male. Tanzania, East Usambara Mountains , Nilo Forest Reserve , lowland wet forest, December 2015. Depository MfN.

Description. Male. General habitus & colour. Comparatively large Eurycorypha species with elongate body shape. Uniformly green with pair of light white to yellowish line starting on face, running through eyes and lateral over disc of pronotum ( Fig. 8 ). Head and antennae: Scapus green, antennae dark, very thin and not surpassing folded tegmina. Fastigium of vertex about 2.5 times as wide as scapus of antenna. Fastigium of vertex meeting equally broad fastigium of frons along well developed horizontal line with shallow median sulcus; face with sharp frontogenal carinae giving face triangular shape; eyes typical for Eurycorypha , elongate and oval, green. Thorax: Pronotum with well developed smoothly rounded lateral edges; anterior margin of pronotum broadly incurved, while posterior margin broadly rounded. Wings: Both pairs of wings fully developed; tegmina elongate, evenly rounded at tips, about 3.2 times longer as broad. Alae shiny with green area near tips which surpass tegmina when folded. Stridulatory file as in Fig. 9 D , slightly sinuous. Legs: Fore coxa with spine. Fore, mid and hind femora on outer side with few broad-based short spines. Hind tibiae with four rows of densely set short spines and three slender apical spurs on each side. Abdomen: Light green without any pattern. Last abdominal tergite differentiated into two stout processes, diverging from each other and each ending in two stout apices ( Fig. 9 A, C ); ventrally another bi-dentate process is present ( Fig. 9 B ). Subgenital plate of normal shape, posterior margin broadly ushaped incised ( Fig. 9 B ).

Measurements (mm).—Male (N = 1). Body length 23. Median length of pronotum 5.5. Posterior femur length 14.8. Length of tegmina 32. Width of tegmina 10.

Female. Unknown.

Remarks. A female from the Zigi Trail in the East Usambara Mountains in November 2015 could belong to this new species. However, since the locality is different and another two Eurycorypha species with the same elongated habitus occur in these mountains this female specimen cannot be assigned to E. divertata n. sp. with certainty.

Diagnosis. The 10th abdominal tergite is elongated and divided into two stout processes, each of these again ending in two stout tips, characters unique so far for male Eurycorypha . Remotely morphologically similar is Eurycorypha stenophthalma Chopard described from Chad. However, the 10th tergite is differentiated into two stout and curved processes and the male cerci very thick and thus completely different from E. divertata n. sp. E. diverata n. sp. morphologically belongs to a group of Eurycorypha species with an elongated 10th abdominal tergite such as E. combretoides , E. elongata n. sp. or E. victoriae n. sp.

Habitat. Lowland wet forest.

Etymology. From Latin:– diverto because of the divergent oriented processes of the 10th abdominal tergite in males.

Distribution. At present only known from Nilo Forest Reserve in the East Usambara Mountains.

Figures

FIGURE 8. Male Eurycorypha divertata n. sp., one of three species exhibiting the same elongated habitus and all occurring syntopically in the East Usambara Mountains.

FIGURE9. Morphologicaldetails of male E.divertata n. sp. Lateral(A)and dorsal(C) view on abdominal apex B. Subgenital plate D. Stridulatory file.