Ocellarnaca hainanensis, Pang & Luo & Bian, 2024

Pang, Siyu, Luo, Haiyu & Bian, Xun, 2024, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera: Ensifera: Stenopelmatoidea) XXV: Six new species from Hainan Province and one new synonym, Zootaxa 5507 (1), pp. 140-152 : 148-150

Ocellarnaca hainanensis sp. nov.

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Figures 8 , 10B

Description. Male. Body medium.

Head. Face ovoid with scattered dots; fastigium verticis about twice as wide as scape; fastigium frontis separated from fastigium verticis by a very fine suture ( Fig. 8A ). Ocelli distinct; median ocellus obviously larger than lateral ocelli ( Fig. 8A ).

Thorax. Anterior margin of pronotum projecting in middle, posterior margin faintly concave ( Fig. 8B ); lateral lobes longer than high, anterior angle arched, posterior angle rounded angular, humeral sinus indistinct ( Fig. 8C ). Fore coxae with 1 small spine; fore and middle femora unarmed, tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs; middle tibiae with 1 internal spur on dorsal surface. Hind femora with 10 internal and 9 external spines on ventral surface; dorsal surface of tibiae with 6 pairs of spines and 1 pair of apical spurs, ventral surface with 1 pair of subapical spurs and 2 pairs of apical spurs. Wings justly reach the apex of abdomen.

Abdomen. Second and third abdominal tergites with few, very minute stridulatory pegs ( Fig. 8D ). Eighth abdominal tergite prolonged. Ninth abdominal tergite semi-globular: prolonged and down-curved; lateral angles of ventral margins with 1 roughly cylindrical process which incurved before middle area and 1 slender spine below the cylindrical process on each side ( Fig. 8E, F, H, I ). Subgenital plate wider than long, lateral margins convex, posterior margin faintly concave; styli cylindrical inserted at apico-lateral angles ( Fig. 8H ).

Female. Unknown.

Coloration. Body greenish. Face brown. Eyes pale yellow. Wings brown with black cells.

Measurements (mm). BL ♂ 20.4, PL ♂ 66.1, TL ♂ 18.1, HFL ♂ 11.9.

Material examined. Holotype: male, Limushan, Qiongzhong , Hainan, June 5, 2024, coll. by Yanting Qin and Yizhen Yao.

Distribution. Hainan (Qiongzhong).

Discussion. The new species is very simialr to Ocellarnaca brevicauda Li, Fang, Liu & Li, 2014 , Ocellarnaca disjuncta Ingrishch, 2019 , Ocellarnaca nigrofemora Shi & Zhu, 2021 and Ocellarnaca longiprotubera Duan, Chen & Shi, 2023 in the processes of male ninth abdominal tergite located on the lateral angles of posterior margin; but differs from them in body greenish ( Fig. 10B ), the processes of male ninth abdominal tergite more slender ( Fig. 8E ), posterior margin of male sugenital plate almost straight ( Fig. 8H ).

Etymology. Named after the type locality.

Figures

FIGURE 8. Ocellarnaca hainanensis sp. nov. Male: A. head in frontal view; B–C. head and pronotum: B. dorsal view, C. lateral view; D. second and third abdominal tergites in lateral view; E–I. apex of abdomen: E. apical and lateral view, F. ventral and slightly apical view, G. lateral view, H. ventral view, I. ventro-apical view.

FIGURE 10. Habitus of raspy cricket from Hainan Province. A. Female, Sinagryllacris biprocera sp. nov.; B. Male, Ocellarnaca hainanensis sp. nov..