Diestramima eurya, Zhu & Shi, 2018

Zhu, Qi-Di & Shi, Fu-Ming, 2018, Review of the genus Diestramima Storozhenko, 1990 (Orthoptera: Rhaphidophoridae: Aemodogryllinae) from China, Zootaxa 4450 (2), pp. 249-274 : 260-261

Diestramima eurya sp. nov.

( Fig. 8 )

Description. Male. Body slightly larger than other species of the genus. Fastigium verticis narrower than scape of antenna, divided into 2 conical tubercles, bases of tubercles drawn together, apices separated, obtuse, directing forward, slightly oblique downward ( Fig. 8B–C ). Eyes oval, distinctly protruding forward; median ocellus oval, located between antennal sockets; lateral ocelli nearly circular, situated on lateral margins of conical tubercles of fastigium verticis ( Fig. 8A–B ). Apical segment of maxillary palp obviously longer than subapical one, apex truncate.

Anterior margin of pronotum rather straight, posterior margin distinctly protruding backward; lateral lobe longer than high, ventral margin arc-shaped ( Fig. 8B–C ). Posterior margin of mesonotum obviously protruding backward. Posterior margin of metanotum slightly straight.

Fore coxae with 1 small spine; femora unarmed on ventral surface, external genicular lobe with 1 long spine; tibiae with 2 inner spines and 2 outer spines on ventral surface, apices with 1 outer spine on dorsal surface and 1 pair of spines on ventral surface, between the paired ventral spines with 1 small spine. Middle femora unarmed on ventral surface, internal and external genicular lobes with 1 long spine respectively; tibiae with 2 inner spines and 2 outer spines on ventral surface, apices with 1 pair of dorsal spines and 1 pair of ventral spines, between the paired ventral spines with 1 small spine. Hind femora with 7–8 inner spines on ventral surface, tibiae with 33 inner spines and 36–38 outer spines on dorsal surface, subapices with 1 pair of dorsal spines, apices with 1 pair of dorsal spines and 2 pairs of ventral spines, interio-dorsal spine nearly equal to hind basitarsi; hind basitarsi with 2 dorsal spines ( Fig. 8H ).

Posteromedian process of 7th abdominal tergite broad, both sides nearly parallel, one third of apical area curved downward, apex obtuse ( Fig. 8D–E, F–G ). Basal two third of paraproct slightly broad, subsequently constricted, apical one third triangular, directing backward ( Fig. 8D–E ). Cerci slender, conical, apices acute.

Female. Unknown.

Coloration. Body light brown. Under the eyes with 1 longitudinal black stripe respectively, legs with yellow spots, apices of femora with ring-like black stripes, spines of hind femora and tibiae black.

Material examined. Holotype: male, Adebo, Jinping , Yunnan, 23 July, 2006, coll. Haoyu Liu.

Measurements (mm). Body: ♂ 23.8; pronotum: ♂ 7.5; fore femora: ♂ 16.0; hind femora: ♂ 30.2; hind tibiae: ♂ 32.6; hind basitarsi: ♂ 6.2.

Distribution. China (Yunnan).

Discussion. The new species is very similar to Diestramima curvicaudata Qin, Wang, Liu & Li, 2016 , but it can be easily distinguished from the latter in: posteromedian process of male 7th abdominal tergite broad, both sides nearly parallel, one third of apical area curved downward, apex obtuse. Basal two third of male paraproct slightly broad, subsequently constricted, apical one third triangular, directing backward.

Etymology. The new species name refers to posteromedian process of male 7th abdominal tergite broad, Greek eury - means broad.

Figures

FIGURE 8. Diestramima eurya sp. nov., A–H. male: A–C. head and pronotum: A. frontal view, B. lateral view, C. dorsal view; D–G. apex of abdomen: D. ventro-lateral view, E. lateral view, F. dorsal view, G. apico-dorsal view; H. hind basitarsus in lateral view.