Larnaca (Larnaca) nigrifrons Pang & Zhang & Bian 2023, sp. nov.
Creators: name: Pang, Siyu
name: Zhang, Qianwen
name: Bian, Xun
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllacrididae
Larnaca
Larnaca nigrifrons

description: Larnaca (Larnaca) nigrifrons sp. nov.
DZffiaedz
Figures 12–13
Description. Male. Body small with setae. Occiput convex. Fastigium verticis twice as wide as scape; fastigium frontis separated from fastigium verticis by a very fine suture (Fig. 12A). Eyes oval, projecting outward. Median ocellus larger, nearly circular; lateral ocelli suited the lateral margins of fastigium verticis.
Anterior margin of pronotum faintly projecting, posterior margin nearly straight (Fig. 12B); lateral lobes longer than high, anterior angle arched, lateral lobes with V-shaped furrow on each side (Fig. 12C). Mesonotum and metanotum about half as long as pronotum, posterior angles rounded angular (Fig. 12C).
Fore coxae with 1 small spine; fore and middle femora unarmed, tibiae ventrally with 4 pairs of spurs and 1 pair of apical spurs, the second spine obviously longer. Hind femora with 10–11 internal and 10–12 external spines on ventral surface; dorsal surface of tibiae with 6 pairs of spines and 1 pair of apical spurs, ventral surface with 2 pairs of apical spurs.
Wings smaller, latrad (Fig. 12D). Tegmina subovate, reaching the posterior margin of mesonotum; hind wings sub-triangular, posterior margin truncate.
Second abdominal tergite with 1 short row and 1 long row of stridulatory pegs; third abdominal tergite with 2 subparallel rows of stridulatory pegs (Fig. 12E). Eighth abdominal tergite prolonged backward (Fig. 12F). Ninth abdominal tergite shorter than the preceding tergite, split along the midline, the lateral sides with convex base, ventro-internal angle of the swollen prolonged into a spine, its apices directing outward and slightly forward; in situ spines from both sides crossing each other (Fig. 12G–H). Tenth abdominal tergite narrow, invisible in dorsal view. Cerci slender, nearly conical. Subgenital plate with basal margin straight, lateral margins convex, posterior margin angularly concave, the lateral lobes obtuse (Fig. 12I). Styli long, about twice as long as the lateral lobes of subgenital plate, sub-cylindrical, apices obtuse, inserted at apico-lateral angles of the plate.
Female. Seventh abdominal sternite longer than wide, ventral surface obviously convex (Fig. 13I). Subgenital plate short, basal margin with 1 pair of copulatory depressions, posterior margin widely rounded (Fig.13I). Ovipositor falcate, most strongly upcurved in subbasal area, margins gradually approaching towards apex (Fig. 13G).
Coloration. Body yellowish brown. Face and dorsal surface of head black (Figs. 12A, 13A). Scape and pedicelli with basal areas black, flagellum with blackish ring on each segment. Ocelli yellowish or black. Pronotum yellowish brown with brown margins, anterior margins with 1 pair of black spots which connected in the middle (Figs. 12B, 13C). Posterior margin of metanotum, and first to seventh abdominal tergites black. Basal areas of tibiae with black rings; spines of hind legs black, external surface with two rows of black spots (Figs. 13G). Ovipositor brown.
Measurements (mm). Male: BL 16.83–21.08, PL 4.25–4.29, TL 1.71–1.78, HFL 9.69–11.73; Female: BL 16.83–20.44, PL 4.74–4.80, TL 1.89–2.01, HFL 9.29–9.84, OvL 9.24–10.48.
Material examined. Holotype: male, Xiniaogu, Yingjiang, Yunnan, August 21, 2023, coll. by Siyu Pang and Ting Luo. Paratypes: 1 male, Xima, Yingjiang, Yunnan, July 11, 2023, coll. by Weizhong Yang; 1 male, Xima, Yingjiang, Yunnan, July 15, 2023, coll. by Weizong Yang; 2 females, Xima, Yingjiang, Yunnan, August 11, 2023, coll. by Weizong Yang; 5 females, Xima, Yingjiang, Yunnan, August 12, 2023, coll. by Weizong Yang; 1 female, Xima, Yingjiang, Yunnan, August 18, 2023, coll. by Weizong Yang; 1 male, Xima, Yingjiang, Yunnan, August 20, 2023, coll. by Weizong Yang; 1 female, Xima, Yingjiang, Yunnan, August 21, 2023, coll. by Weizong Yang; 1 female, Xiniaogu, Yingjiang, Yunnan, August 22, 2023, coll. by Siyu Pang and Ting Luo; 1 male and 2 females, Xima, Yingjiang, Yunnan, August 27, 2023, coll. by Weizong Yang.
Distribution. Yunnan (Yingjiang).
Discussion. The new species differs from other species of the genus: wings latrad; face and dorsal surface of head black; male subgenital plate with posterior margin angularly concave, the lateral lobes obtuse; female seventh abdominal sternite without median groove.
Etymology. The new species is named with reference to the black face.
description: Published as part of Pang, Siyu, Zhang, Qianwen & Bian, Xun, 2023, Contribution to the knowledge of Chinese Gryllacrididae (Orthoptera: Ensifera: Stenopelmatoidea) XXII: New descriptions from Southwest China, pp. 487-504 in Zootaxa 5374 (4) on pages 499-502, DOI: 10.11646/zootaxa.5374.4.2, http://zenodo.org/record/10158968