Diestramima acutiapicis, 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 : 250-252

Diestramima acutiapicis sp. nov.

( Figs.1 , 18 )

Description. Male. Body medium-sized. Fastigium verticis narrower than scape of antenna, divided into 2 conical tubercles, bases of tubercles drawn together, apices separated, obtusely rounded, directing forward and slightly oblique downward ( Fig. 1A, C ). Eyes oval, protruding forward; median ocellus oval, located between antennal sockets, lateral ocelli nearly circular, situated on lateral margins of basal fastigium verticis ( Fig. 1A, B ). 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, ventral margin arc-shaped ( Fig. 1B–C ); posterior margin of mesonotum protruding backward; posterior margin of metanotum rather 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 7–8 inner spines on ventral surface; tibiae with 29–32 inner spines and 31–34 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, intero-dorsal spine slightly shorter than hind basitarsi; hind basitarsi with 1–3 dorsal spines ( Fig. 1F ).

Posteromedian process of 7th abdominal tergite elongate, obviously surpassing apex of paraproct, base of posteromedian process slightly broad, gradually narrowing, the middle area slightly curved downward, apex globular ( Fig. 1D–E ). Basal half of paraproct broad, the middle area constricted, subsequent area narrow, nearly parallel on both sides, apex acute, spine-shaped, directing upward ( Fig. 1D ). Cerci slender, conical, apices acute ( Fig. 1D ). Genitalia completely membranous, with 8 lobes, apical area of dorso-median lobe with a notch, ventromedian lobe slightly shorter, apex obtuse.

Female. Posterior margin of 7th abdominal tergite with 1 angle-shaped process. Base of ovipositor broad, narrowing to apex, dorsal valvulae smooth, apical areas of ventral valvulae denticulate on ventral surface ( Fig. 1H ). Subgenital plate nearly trapezoid, basal area broad, apical area with 1 deep notch ( Fig. 1G ).

Coloration. Body brown, some specimens with 1 longitudinal yellow band from apex of fastigium verticis to apex of posteromedian process of 7th abdominal tergite. Face with 4 longitudinal black stripes. Eyes black, median and lateral ocelli yellow. Apices of all femora with ring-like black stripes. Basal half of hind femora with irregular black stripes.

Material examined. Holotype: male, Leigongshan, Leishan , Guizhou, 31 July, 2017, coll. Qidi Zhu and Yanqing Li . Paratypes: 2 males and 2 females, Leigongshan, Leishan , Guizhou, 30 July, 2017, coll. Qidi Zhu and Yanqing Li ; 1 male and 1 female, Leigongshan, Leishan , Guizhou, 31 July, 2017, coll. Qidi Zhu and Yanqing Li ; 2 males, Jiuwanshan , Guangxi, 9 June, 2015, coll. Li Han ; 1 male, Yangmeiao, Rongshui , Guangxi, 10 August, 2015, coll. Li Han ; 1 male, Yuanbaoshan, Rongshui , Guangxi, 1 August, 2015, coll. Zhilin Chen . Other specimens: 1 male and 2 females, Leigongshan, Leishan , Guizhou, 30 July, 2017, coll. Qidi Zhu and Yanqing Li ; 2 males, Lianhuaping, Leishan , Guizhou, 28 July, 2017, coll. Qidi Zhu and Yanqing Li ; 3 males and 3 females, Lianhuaping, Leishan , Guizhou, 29 July, 2017, coll. Qidi Zhu and Yanqing Li .

Measurements (mm). Body: ♂ 19.0–24.0, ♀ 19.8–21.5; pronotum: ♂ 5.2–5.4, ♀ 5.8–6.0; fore femora: ♂ 12.2– 13.0, ♀ 12.4–12.8; hind femora: ♂ 21.5–22.0, ♀ 22.8–23.0; hind tibiae: ♂ 23.4–23.8, ♀ 24.0–24.9; hind basitarsi: ♂ 5.0–5.4, ♀ 4.7–5.2; ovipositor: 18.0–19.2.

Distribution. China (Guangxi, Guizhou).

Discussion. The new species differs from Diestramima intermedia Liu & Zhang, 2001 by: basal half of male paraproct broad, the middle area constricted, subsequent area narrow, nearly parallel on both sides, apex acute, spine-shaped, directing upward. Female subgenital plate nearly trapezoid, basal area broad, apical area with 1 deep notch.

Etymology. The name of the new species is derived from apex of male paraproct acute, Latin acut - means acute, with the Latin apic - means apex.

Figures

FIGURE 1. Diestramima acutiapicis sp. nov., A–F. male, G–H. female: 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; G. subgenital plate in ventral view; H. ovipositor in lateral view.

FIGURE 18. Male genitalia. A–B. Diestramima beybienkoi Qin, Wang, Liu & Li, 2016; C–D. Diestramima truncata sp. nov.; E–F. Diestramima subtilis sp. nov.; G–H. Diestramima tibetensis Qin, Wang, Liu & Li, 2016; I–J. Diestramima cycla sp. nov.; K–L. Diestramima subrectis Qin, Wang, Liu & Li, 2016; M–N. Diestramima triangulata Qin, Wang, Liu & Li, 2016; O–P. Diestramima intermedia Liu & Zhang, 2001; Q–R. Diestramima acutiapicis sp. nov.: A, C, E, G, I, K, M, O, Q: dorsal view; B, D, F, H, J, L, N, P, R: ventral view.