Leptoteratura (Rhinoteratura) chela, Tan & Gorochov & Wahab, 2017

Tan, Ming Kai, Gorochov, Andrej V. & Wahab, Rodzay Bin Haji Abdul, 2017, New taxa and notes of katydids from the tribe Meconematini (Orthoptera: Meconematinae) from Brunei Darussalam, Zootaxa 4337 (3) : -

Leptoteratura (Rhinoteratura) chela , new species

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:499449 ( Figs. 2 , 3 )

Material examined. Holotype (male, KB.17.43): Brunei Darussalam, Ulu Temburong National Park, Kuala Belalong Field Studies Centre along Ashton Trail , primary ridge dipterocarp forest, N4.54621, E115.15688, 143.3± 7.8 m a.s.l., under foliage of tree, 8 January 2017, 1950 hours, coll. M. K. Tan (dried pinned, ZRC).

Diagnosis. This species differs from all known species by shape of male cercus: symmetrical, apex forming an acute and tooth-like stout hook; with a subapical inner lobule; lobule with rounded apex, nearly touching the apex of the apical hook.

Description. Male (holotype). Habitus typical for the genus, but body relatively large ( Fig. 2 ). Eyes globular and protruding ( Figs. 3A, 3B ). Scapus large. Frontal rostrum flattened, small and narrower than scapus, with shallow median sulcus, apex truncated ( Fig. 3B ). Fifth (apical) segment of maxillary palpus short, conical and widened apically; fourth (subapical) segment also fairly short, slightly longer than apical segment. Fourth and third segments of subequal length, both longer than second segment. Pronotum covering the base of mirror of tegmen, dorsal disc bent into lateral lobe, lateral keel present, transverse sulcus indistinct ( Fig. 3A ). Anterior margin of pronotal disc straight, posterior margin roundly triangular ( Fig. 3A ). Humeral sinus almost indistinct ( Fig. 3C ). Ventral margin of pronotal lateral lobe feebly sinuous. Thoracic auditory spiracle (= thoracic foramen) large and bean-shaped, barely covered by pronotal lateral lobe. Macropterous, tegmen extending behind the hind knees, hindwing slightly longer ( Fig. 2 ). Coxal spur of fore leg relatively long and slender, but apex somewhat subacute. Both tympana oval and open. Fore tibiae each with 3 outer and 4 inner subapical spines. Middle tibiae each with 3 outer and 4-5 inner subapical spines. Inner and outer knees of hind femora rounded. Hind tibiae ventrally and dorsally with numerous outer and inner spines as well as 2 ventral pairs and 1 dorsal pair of apical spurs. Tenth abdominal tergite with posterior margin concave. Epiproct small and tongue-shaped. Cerci short and simple, straight and not tapering, with apex forming a stout hook (apex of hook acute and tooth-like), and with a subapical inner lobule; this lobule with rounded apex, nearly touching the apex of the apical hook ( Figs. 3D–3F ). Subgenital plate hexagonal in shape, longer than broad; apical margin almost truncated (slightly angular; Fig. 3F ); with styli moderately short and somewhat conical, straight, apices obtuse ( Figs. 3E, 3F ).

Colouration. Pale green when alive ( Fig. 2 ); white to ochre (discoloured) in alcohol. Mouthparts very pale. Scapus pale green. Antennae yellow brown. Pronotum pale green. Tegmen pale green, anal margin brown, with apical half having a few small faintly infumated spots within cells; exposed part of hindwing similar to tegmen, without black spot. Legs generally very pale green, sometimes very pale yellow green. Abdomen nearly white with tint of pale green.

Female. Unknown.

Measurement (in mm). BL = 6.7 (body shrunk when dried), BWL = 17.4, PL = 3.2, TL = 15.1, HWT = 1.0 HFL = 9.0, HTL = 10.6.

Etymology. The species name “ chela ” refers to pincer-like male cercus (from Greek, chela = pincer).

Figures

FIGURE 2. Leptoteratura (Rhinoteratura) chela sp. nov.: living male HOlOtype.

FIGURE 3. Leptoteratura (Rhinoteratura) chela sp. nov.: Head and prOnOtum in dOrsal view (A), Head in dOrsal view (B), Head and prOnOtum in prOfile (C); male abdOminal apex in dOrsal (sHrunken upOn drying) (D), lateral (E) and ventral (F) views. Scale bar: 1 mm (except B— 0.5 mm).