Diestramima arbora, Wang & Zhu & Shi, 2019

Wang, Ping, Zhu, Qidi & Shi, Fuming, 2019, Supplement of the genus Diestramima Storozhenko, 1990 (Orthoptera: Rhaphidophoridae: Aemodogryllinae) from China, Zootaxa 4615 (3), pp. 577-584 : 577-580

Diestramima arbora sp. nov.

( Figs. 1 , 3–4 ; Map. 1 )

Description. Male. Body medium-sized. Fastigium verticis with 2 conical tubercles, apices of tubercles drawn together, obtusely rounded, directing forward ( 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. 1 A–B). Apical segment of maxillary palp distinctly longer than subapical one, apex inflated, globular.

Pronotum broad, anterior margin of disc rather straight, posterior margin distinctly protruding backward; lateral lobe longer than high, ventral margin arc-shaped ( Fig. 1 B–C). Mesonotum and metanotum slightly narrow, 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, internal genicular lobe with 1 small spine, external genicular lobe unarmed; tibiae with 29–34 inner spines and 33–34 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 nearly equal to length of hind basitarsi; hind basitarsi with 2 dorsal spines ( Fig. 1F ).

Posterior margin of sixth abdominal tergite slightly straight. Posteromedian process of seventh abdominal tergite rather long, surpassing apex of paraproct, basal part of posteromedian process broad, apical two thirds slightly narrow, nearly parallel on both sides, posterior margin truncate ( Fig. 1 D–E). Epiproct simple, ligulate. Paraproct nearly rectangular, apical part slightly narrow, posterior margin concave ( Fig. 1D ). Cerci slender, conical, apices acute. Genitalia with 8 membranous lobes, apical area of dorso-median lobe with a distinct notch, dorso-lateral lobes nearly equal to dorso-median lobe ( Fig. 3 C–D). Subgenital plate transverse and broad, posterior margin truncate

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Female. Appearance is similar to male. Ovipositor longer than half of hind femora, dorsal valvulae smooth, api- cal areas of ventral valvulae denticulate (Fig. 1H). Subgenital plate nearly triangular, both sides of basal area with 1 oval lobe respectively, apex obtusely rounded (Fig. 1G).

Coloration. Dorsal surface of body brown, ventral surface yellowish brown. Eyes black, ocelli yellow. Ventral surface of scape of antenna with 1 longitudinal black band. Face with 4 longitudinal black stripes. All tibiae and femora with ring-like black stripes. Spines of hind tibiae and femora black.

Material examined. Holotype: male, Shiwandashan, Shangsi, Guangxi, 28 July, 2018, collected under the bark by Qidi Zhu . Paratypes: 3 females, Shiwandashan, Shangsi, Guangxi, 28 July, 2018, collected under the bark by Qidi Zhu .

Measurements (mm). Body: ♂20.5, ♀23.0–26.5; pronotum: ♂7.0, ♀8.0–9.5; fore femora: ♂14.5, ♀16.0– 17.5; hind femora: ♂26.5, ♀33.0–35.0; hind tibiae: ♂29.0, ♀35.0–36.5; hind basitarsi: ♂7.0, ♀8.0–8.5; ovipositor: 21.0–22.0.

Distribution. China (Guangxi).

Discussion. The new species differs from Diestramima beybienkoi Qin, Wang, Liu & Li, 2016 by: posteromedi- an process of male seventh abdominal tergite rather long, surpassing apex of paraproct, basal part of posteromedian process broad, apical two thirds slightly narrow, nearly parallel on both sides, posterior margin truncate; paraproct nearly rectangular, apical part slightly narrow, posterior margin concave

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Etymology. The name of the new species is derived from the specimens collected under the bark. Latin “ arbor- ” referring to roosting in trees.

Figures

FIGURE 1. Diestramima arbora sp. nov., 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; female: G. subgenital plate in ventral view; H. ovipositor in lateral view.

MAP 1. Distribution of the genus Diestramima from China.

FIGURE 3. Male genitalia. A–B. Diestramima lamina sp. nov.; C–D. Diestramima arbora sp. nov.: A, C: dorsal view; B, D: ventral view.

FIGURE 4. Habitat of Diestramima arbora sp. nov.