Aphlugiolopsis trapeziformis, Cui & Bian, 2024

Cui, Zhenzhen & Bian, Xun, 2024, Two new species of Aphlugiolopsis (Orthoptera: Tettigoniidae: Meconematinae) from Yunnan, China, Zootaxa 5474 (5), pp. 593-599 : 593-596

Aphlugiolopsis trapeziformis sp. nov.

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Figures 1–2

Description. Male. Body small. Head stout, vertical. Fastigium verticis stout, conical, apex obtusely rounded, dorsal surface with a narrowly longitudinal furrow ( Fig. 1A ). Eyes nearly globular, protruding forward. Internal margin of scape slightly swollen. Apical segment of maxillary palp subequal to subapical one, apex inflated. Pronotum short, anterior margin faintly arched, posterior margin narrowly rounded, with weakly posterior transverse sulcus ( Fig. 1A ); lateral lobes longer than high, narrowing posteriorly, anterior and posterior angles obtusely rounded, ventral surface straight, posterior margin oblique, without humeral sinus ( Fig. 1B ). Tegmina not surpassing apex of abdomen, reaching to middle of seventh abdominal tergite ( Fig. 1B ), stridulatory area large, anterior margin expanded, posterior margin straight, apices obtusely rounded; hind wings shorter than tegmina. Fore coxae with 1 small spine. All femora unarmed on ventral surface; apices of genicular lobes of hind femora obtusely rounded. Fore tibiae ventrally with 3–4 internal and 4–5 external spines (usually with 4 internal and 5 external spines); tympana open on both sides, oblong, internal tympanum slightly larger than external one. Middle tibiae with 5 internal and 6 external spines on ventral surface. Hind tibiae with 22–24 internal and 26–27 external spines on dorsal surface, ventrally with 1–2 internal and 5–6 external spines, apices with 1 pair of dorsal spurs and 1 pair of ventral spurs. Posterior margin of tenth abdominal tergite straight, middle area triangularly concave ( Fig. 1C ). Cerci long, one third of apices crossed with each other; base stout, narrowing to apex, apical part weakly compressed, apices subacute ( Fig. 1C, E ); internal margins expanded, the interno-dorsal lobe semicircular, the interno-ventral lobe curved dorsally ( Fig. 1E ). Subgenital plate longer than broad, base broad, distinctly narrowing to apex, lateral margin rolled dorsally, posterior margin arced protruding. Styli conical, apices blunt, located on both sides of apical area of subgenital plate ( Fig. 1I ).

Female. Body slightly larger than male. Lateral margins of ninth abdominal tergite slightly extended; posterior margin of tenth abdominal tergite slightly concave; epiproct circular. Cerci short, conical, apices subacute. Base of ovipositor stout, obviously narrowing to apex, dorsal and ventral valvulae smooth, apices of dorsal valvulae acute, apices of ventral valvulae hook-shaped ( Fig. 2F, G ). Subgenital plate wider than long, base half sub-rectangular, lateral margin slightly narrowing to middle area ( Fig. 2I ); apex half subtrapezoidal, lateral margin obviously narrowing to apex, ventral surface with 1 pair of carinae ( Fig. 2H ); basal margin arched concave, lateral margins of middle area slightly rolled ventrally, posterior margin straight ( Fig. 2H ).

Coloration. Body yellowish brown. Eyes blackish brown. Dorsal surface of head with four longitudinal black brown stripes, the internal stripes reaching to apex of fastigium verticis. Internal margins of antennal sockets, scape and flagellum light brown; each segment of flagellum with brownish ring. Disc of pronotum with brownish or blackish-brown longitudinal band. Apices of femora light brown, bases and apices of tibiae light brown, tarsi light brown. Bases of tegmina yellowish brown, apices blackish brown. Disc of abdomen blackish brown.

Measurements (mm). Body: ♂ 8.4, ♀ 8.6–11.7; pronotum: ♂ 3.7, ♀ 3.8–4.2; tegmina: ♂ 5.5, ♀ 5.9–6.4; hind femora: ♂ 9.4, ♀ 11.2–11.7; ovipositor: 10.1–10.4.

Material examined. Holotype: male, Tongbiguan, Yingjiang , Yunnan, August 20, 2023, coll. by Siyu Pang and Ting Luo . Paratypes: 4 females, the other information as for holotype.

Distribution. Yunnan (Yingjiang).

Discussion. This species differs from Aphlugiolopsis punctipennis Wang, Liu & Li, 2015 by: male cerci simple, internal margins of basal area slightly expanded, without long process; female subgenital plate roughly subtrapezoidal in ventral view, posterior margin straight. While Aphlugiolopsis punctipennis Wang, Liu & Li, 2015 has basal area of male cerci with a long process, and subgenital plate of female sub-pentagonal with posterior margin obtusely rounded.

Etymology. The name of the new species is based on the female subgenital plate which subpentagonal in ventral view.

Figures

FIGURE 1. Aphlugiolopsis trapeziformis sp. nov. Male: A. head and pronotum in dorsal view; B. head, pronotum and tegmen in lateral view; C–I: apex of abdomen: C. dorsal view, D. lateral view, E. lateral and ventral view, F. lateral and dorsal view, G–H. ventral and apical view, I. ventral view.

FIGURE 2. Aphlugiolopsis trapeziformis sp. nov. Female: A, C. head and pronotum: A. dorsal view, C. lateral view; B. head, pronotum and tegmen in lateral view; D–E. apex of abdomen: D. dorsal view, E. lateral view; F. apices of ovipositor in lateral view; G. apex of abdomen and ovipositor in lateral view; H–I. subgenital plate: H. ventral view, I. ventral and lateral view.