Diestramima bina, 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 : 257

Diestramima bina sp. nov.

( Fig. 6 )

Description. Male. Body medium-sized. Fastigium verticis narrower than scape of antenna, divided into 2 conical tubercles, bases of tubercles drawn together, apices separated, obtuse, directing forward ( Fig. 6A, C ). Eyes oval, obviously protruding forward; median ocellus oval, located between antennal sockets; lateral ocelli nearly circular, situated on lateral margins of basal fastigium verticis.

Anterior margin of pronotum rather straight, posterior margin distinctly protruding backward; lateral lobe longer than high, ventral margin arc-shaped ( Fig. 6B–C ). Posterior margin of mesonotum obviously protruding backward. Posterior margin of metanotum rather 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 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 6 inner spines on ventral surface; tibiae with 32 inner spines and 33 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 1 dorsal spine ( Fig. 6F ).

Posteromedian process of 7th abdominal tergite long, obviously surpassing apex of paraproct, basal half of posteromedian process narrower than apical half, one fourth nearly apical area curved downward, apex obtusely rounded, directing downward ( Fig. 6D–E ). Paraproct rather long, basal area narrow, dorsal margin of median area with 2 triangular processes, compressed, apex of paraproct obtuse, directing dorso-backward ( Fig. 6D ). Cerci slender, conical, apices acute ( Fig. 6D–E ).

Female. Unknown.

Coloration. Body brown. Face with 4 longitudinal black stripes, legs with ring-like yellow stripes, spines of hind femora and tibiae black.

Material examined. Holotype: male, Mangshan, Zhangyi , Hunan, 27 August, 2016, coll. Wei Xiao.

Measurements (mm). Body: ♂ 16.5; pronotum: ♂ 5.8; fore femora: ♂ 8.2; hind femora: ♂ 25.2; hind tibiae: ♂ 27.6; hind basitarsi: ♂ 5.6.

Distribution. China (Hunan).

Discussion. The new species is similar to Diestramima emeiensis Qin, Wang, Liu & Li, 2016 , but it can be easily distinguished by: posteromedian process of 7th abdominal tergite long, obviously surpassing apex of paraproct, basal half of posteromedian process narrower than apical half, one fourth nearly apical area curved downward, apex obtusely rounded, directing downward. Paraproct rather long, basal area narrow, dorsal margin of the middle area with 2 triangular processes, compressed, apex of paraproct obtuse, directing dorso-backward.

Etymology. The name of the new species refers to dorsal margin of the middle area of male paraproct with 2 triangular processes, Latin bin - means binus.

Figures

FIGURE 6. Diestramima bina sp. nov., A–F. male: A–C. head and pronotum: A. frontal view, B. lateral view, C. dorsal view; D–E. apex of abdomen: D. lateral view, E. dorsal view; F. hind basitarsus in lateral view.