Diestramima austrosinensis quaterna, 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 : 252-255

Diestramima austrosinensis quaterna ssp. nov .

( Figs. 3–4 )

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. 3A, C ). Eyes oval, protruding forward; median ocellus oval, located between antennal sockets; lateral ocelli nearly circular, situated on lateral margins of conical tubercles of fastigium verticis ( Fig. 3A, C ). Apical segment of maxillary palp obviously longer than subapical one, apex inflated, globular.

Anterior margin of pronotum rather straight, posterior margin protruding backward; lateral lobe longer than high, anterior margin slightly oblique, ventral margin arc-shaped, posterior margin rather straight ( Fig. 3B–C ). Posterior margin of mesonotum protruding backward. Posterior margin of metanotum slightly straight.

Fore coxae with 1 small spine; femora unarmed on ventral surface, internal genicular lobe with 1 small spine, 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 7–10 inner spines on ventral margin; tibiae with 30–31 inner spines and 34 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 slightly longer than hind basitarsi; hind basitarsi with 2 dorsal spines ( Fig. 3H ).

Posteromedian process of 7th abdominal tergite long, surpassing apex of paraproct, the middle of posteromedian process slightly curved downward, apical area with 4 equilong posteromedian processes ( Fig. 3D– E, G ). Paraproct large, nearly quadrangular in lateral view, apical angle obtuse ( Fig. 3G ). Cerci slender, conical, apices acute ( Fig. 3D–E, G ). Genitalia completely membranous, with 8 lobes, apices of dorso-median lobe and ventro-median lobe with 1 notch respectively.

Female. Unknown.

Coloration. Body yellowish-brown, with brown spots. Face with 4 longitudinal brown stripes, both sides of clypeus with brown spots. Apices of all femora brown, spines of hind femora and tibiae black.

Material examined. Holotype: male, Longhushan, Shaowu , Fujian, 14 August, 2014, coll. Gang Wang and Huifang Guo . Paratypes: 1 male, Longqishan, Jiangle , Fujian, 9 August, 2014, coll. Gang Wang and Huifang Guo ; 1 male, Ziyun, Mingjian , Fujian, 30 July, 2014, coll. Gang Wang and Huifang Guo . Other specimen: 1 male, Huangtanlinchang, Pan’an , Jinhua , Zhejiang, 28 July, 2015, coll. Chuan Wang .

Measurements (mm). Body: ♂ 21–25.5; pronotum: ♂ 6.0–6.5; fore femora: ♂ 13.2–14.0; hind femora: ♂ 22.6– 27.8; hind tibiae: ♂ 23.8–29.6; hind basitarsi: ♂ 4.0–5.2.

Distribution. China (Fujian, Zhejiang).

Discussion. The subspecies differs from the nominate Diestramima austrosinensis Gorochov, 1998 in: posteromedian process of male 7th abdominal tergite with 4 equilong posteromedian processes. However, there is only the difference in character of apical posteromedian process of male 7th abdominal tergite between them, we consider it as a subspecies of Diestramima austrosinensis Gorochov, 1998 . There is another specimen collected from Huangtanlinchang, Pan’an, Jinhua, Zhejiang, its posteromedian process of male 7th abdominal tergite with 4 posteromedian processes, the 2 dorsal processes shorter with the 2 ventral ones slightly longer, visible in dorsal surface. We regard it as an individual variation of Diestramima austrosinensis quaterna ssp. nov . and provide its morphological photograph ( Fig. 4 ).

Etymology. Name refers to posteromedian process of male 7th abdominal tergite with 4 posteromedian processes, Latin quatern - means four.

Figures

FIGURE 3. Diestramima austrosinensis quaterna ssp. nov. from Fujian, A–H. male: A–C. head and pronotum: A. frontal view, B. lateral view, C. dorsal view; D–G. apex of abdomen: D. dorsal view, E. apico-dorsal view, F. ventral view, G. lateral view; H. hind basitarsi in lateral view.

FIGURE 4. Diestramima austrosinensis quaterna ssp. nov. from Zhejiang, A–F. male: A–C. head and pronotum: A. frontal view, B. lateral view, C. dorsal view; D–G. apex of abdomen: D. lateral view, E. dorsal view; F. hind basitarsus in lateral view.