Sinorhaphidophora gracilenta, Bian, 2024

Bian, Xun, 2024, Contribution to the Chinese subfamily Rhaphidophorinae Walker, 1869 (Orthoptera: Rhaphidophoridae: Rhaphidophorinae) VIII: Three new species of Sinorhaphidophora from Hainan Province, Zootaxa 5519 (2), pp. 257-268 : 261

Sinorhaphidophora gracilenta sp. nov.

÷ș华ĸDz

Figures 3–4

Description. Male. Body large. Head. Face smooth ( Fig. 3A ). Dorsal surface of fastigium verticis with a longitudinal furrow along the midline, apices which divide fastigium verticis into 2 distinct rostral tubercles with the apical area separated from each other ( Fig. 3B ). Eyes ovoid, protruding forward; lateral ocelli large, nearly occupying all the lateral margins of rostral tubercles; median ocellus slightly smaller than lateral ocelli, nearly oval ( Fig. 3A–B ). Apical segments of maxillary palpi longer than subapical ones, apices slightly inflated. Thorax. Anterior margin of pronotum slightly concave, posterior margin protruding backward and widely rounded ( Fig. 3C ); lateral lobes longer than high, ventral margin undulate and slightly rolled. Posterior margin of mesonotum protruding backward, posterior margin of metanotum faintly protruding. Fore coxae convex with 1 stout spine; femora with 1 short apical spine; tibiae with 1 internal and 2 external spines ventrally, apices with 1 pair of spines on ventral surface. Middle femora with 1 pair of apical spines; tibiae dorsally with 2 pairs of spines, ventral surface with 2 external spines, apices with 1 pair of spines on dorsal and ventral surfaces separately. Hind femora with 1 short ventral spine on internal margin ( Fig. 3E ); tibiae dorsally with 18 internal spines, 18–19 external spines and 1 pair of small subapical spines, apices with 1 pair of dorsal and 2 pairs of ventral spines; basitarsi with 5 small spines and 1 large apical spine on dorsal surface along the midline ( Fig. 3G ). Abdomen. Apex of abdomen curved downwards. Posterior margin of fourth abdominal tergite faintly projecting in middle; posterior margin of fifth abdominal tergite subtriangular projecting in middle, apical margin narrowly rounded; posterior margin of sixth abdominal tergite with 1 large semielliptical median lobe, its longer and wider than the process of the preceding tergite; tenth abdominal tergite slightly prolonged with apical margin faintly concave in middle ( Fig. 3M, H ). Epiproct longer than wide in apical view, dorsal surface furrowed along the midline ( Fig. 3M ); lateral margins converging, apical margin rounded ( Fig. 3M ). Cerci slender, conical, apices acute. Basal margin of subgenital plate straight, posterior margin arched ( Fig. 3L ); lateral margins with basal half convex and then narrowing after middle. Styli roughly cylindrical, depressed, inserted on ventral surface of the plate at apical area, apices obtuse ( Fig. 3L ). Genitalia entirely membranous.

Female. Abdomen. Posterior margin of fourth abdominal tergite faintly projecting; posterior margin of fifth abdominal tergite triangular projecting in middle; sixth abdominal tergite with longer and wider posteromedian process; posterior margin of seventh abdominal tergite with a widely triangular process ( Fig. 4I ). Epiproct ligulate, dorsal surface concave with median furrow, posterior margin narrowly obtuse ( Fig. 4J ). Cerci slender. Basal third of subgenital plate transverse, triangularly narrowing posteriorly and terminating into a spiniform apical area; basal area about as long as apical area ( Fig. 4M ). Ovipositor moderately upcurved behind base, apices acute; dorsal valvulae smooth, apical areas of ventral valvulae serrate on ventral margins ( Fig. 4L ).

Coloration. Body brown. Face with large black spots. Eyes black. Ocelli pale yellow.

Measurements (mm). BL: ♂ 27.63–30.04, ♀ 24.25; PL: ♂ 9.22–9.98, ♀ 9.22; FFL: ♂ 9.55–10.11, ♀ 9.96; MFL: ♂ 8.92–9.90, ♀ 8.81; HFL: ♂ 20.04–23.55, ♀ 24.98; HBL: ♂ 4.85–5.09, ♀ 3.44; OvL 15.99.

Material examined. Holotype: male, Jianling, Wanning , Hainan, May 11, 2024, coll. by Yanting Qin and Ting Luo . Paratypes: 2 males, the other information as holotype; 1 female, Jianling, Wanning , May 16, 2024, coll. by Ting Luo, Yanting Qin and Yizhen Yao. Other specimens: 2 male nymphs and 3 female nymphs, the other information as holotype .

Distribution. Hainan (Wanning).

Discussion. The new species differs from Sinorhaphidophora hainanensis ( Bian & Shi, 2016) by: the processes of male fifth and sixth abdominal tergites narrower and longer with posterior margin narrowly rounded ( Fig. 3H ); male epiproct ligulate, longer than wide, posterior margin rounded ( Fig. 3M ).

Etymology. The new species is named for the narrower processes of male fifth and sixth abdominal tergites.

Figures

FIGURE 3. Sinorhaphidophora gracilenta sp. nov. Male: A. head in frontal view; B. fastigium verticis in dorsal view; C–D. head and thoraces: C. dorsal view, D. lateral view; E–F. apex of hind femur: E. internal view, F. external view; G. tarsus of hind leg in lateral view; H–J. apex of abdomen: H. dorsal view, I. lateral view, J. ventral view; K–L. subgenital plate: K. lateral and ventral view, L. ventral view; M. epiproct in apical view.

FIGURE 4. Sinorhaphidophora gracilenta sp. nov. Female: A. head in frontal view; B. fastigium verticis in dorsal view; C–D. head and thoraces: C. dorsal view, D. lateral view; E–F. apex of hind femur: E. external view, F. internal view; G. tarsus of hind leg in lateral view; H–I, K. apex of abdomen: H. dorsal view, I. dorsal and slightly apical view, L. lateral view; J. epiproct in apical view; L. ovipositor in lateral view; M. seventh abdominal sternite and subgenital plate in ventral view.