Tuberstira pennis Zhou, Yan & Chen, 2025, sp. nov.
Year: 2025
Type: other
Abstract: Tuberstira pennis sp. nov. Figs 1, 2, 3, 4 Type material (2 ♂ 3 ♀). Holotype: China • ♂ (Fig. 1 A, B); “ 云南绿春县大兴镇巴尺山 ” [Yunnan, Lvchun County, Daxing Town, Bachishan Mountain]; 22°57'26"N, 102°26'11"E; alt. 1840 m; 2018. II. 20 [adult reared from larva; this date is the larva collection]; “ 许浩 & 邱见玥 ” [Hao Xu & Jian-Yue Qiu leg.]; CNU. Paratypes: China • 1 ♂ [the metatarsomeres I abnormal: the left one notched in outer margin, the right one with a tooth at basal 1 / 4 of outer margin]; same data as for the holotype; MYNU • 1 ♀ (Fig. 1 C, D); same data as for the holotype • 1 ♀; “ 韶关乳源南岭国家森林公园 ” [Guangdong, Shaoguan City, Ruyuan County, Nanling National Forest Park]; 24°55'1"N, 113°2'8"E; 2023. V. 09; “ 刘振华 ” [Zhen-Hua Liu leg.]; night seeking; CNU • 1 ♀; “ 广西环江县九万山清水塘 ” [Guangxi, Huanjiang County, Jiuwan Mountain, Qingshuitang]; 25°11'59"N, 108°47'46"E; alt. 450 m; 2021. IV. 24; Tang, Peng, Cai & Song leg.; SNUC. Description. Holotype ♂ (Figs 1 A, B, 2 H). Body length 12.2 mm, width 3.6 mm. Body elongate, slightly shiny, about 3.39 × as long as wide; dorsal surface black, except for lighter labrum, labro-epistomal membrane, anterior and posterior margins, lateral portions of pronotum, scutellar shield; antennae light brown, except for apical 2 / 3 antennomere I black, antennomere II – X darker; legs black, except for apical portion of femur, basal portions of tibiae, coxae, tarsi light brown; ventral surface black, except for anterior portion of mesepimeron and ventrite 1, posterior margins of metepisternum, abdominal ventrites light brown. Dorsal surface with few long setae scattered on labrum, epistome, tempora and apical portion of elytra; anterior, posterior margins of pronotum, tibiae and tarsi with short setae; ventral surface with sparse long setae. Head widest at eye level. Terminal maxillary palpus triangularly elongate with straight, cavate inner surface, broadest at base; labrum transversely cordiform, widest before apical margin, slightly emarginate anteriorly; labro-epistomal membrane trapezoidal, widest at base; epistome transversely rectangular with anterior margin slightly arched backward medially, with sparse minute punctures. Frons separated from epistome by indistinct fronto-epistomal impression, with dense, shallow punctures before and between eyes, convex medially with dense, coarse punctures behind eyes (Fig. 2 A). Interocular distance about 0.27 ×, 0.12 × as long as eye diameter dorsally and ventrally, respectively (Fig. 2 A, B). Antennae filiform, length ratios of antennomeres I – XI as 70: 24: 46: 54: 53: 55: 49: 47: 44: 36: 171, antennomere XI curved with pointed apex, slightly shorter than the combined length of four preceding antennomeres. Prothorax about 1.08 × as long as wide, with dense transverse wrinkles on ventral surface (Fig. 2 F). Pronotum sparsely punctate, impressed in lateral portions of apical half; central disc elevated longitudinally, triangularly impressed, punctate before posterior margin and after anterior margin, forming an X-shaped ridge, nearly impunctate in elevated portions, with distinct middle groove, carina in mid 1 / 3 and posterior 1 / 5 respectively (Fig. 2 C, G); anterior, posterior angles slightly projecting laterally. Elytra with acute apex (Fig. 2 E), 2.46 × as long as wide and 4.68 × as long as prothorax, transversally impressed in anterior 3 / 7 and 4 / 7 (Fig. 2 H); strial rows not straight, with punctures separated by distances 1 to 2 × puncture diameter; intervals uneven, some with short strial rows adjacent to long strial rows and scattered punctures (Fig. 2 D), odd-numbered intervals with large setigerous tubercles, denser in apical 1 / 3 (Fig. 2 E). Legs thin; profemora slightly flattened in basal 1 / 3, meso- and metatibiae moderately flattened in basal 1 / 2; metatibiae flattened, with inner margin slightly curved in posterior 1 / 2. Abdominal ventrites glossy, with sparse fine setigerous punctures in disc. Defensive glands present, with paired reservoirs attached to the distal 2 / 3 of ventrite V, the terminal oval-shaped, extending to the basal 2 / 3 ventrite IV. Aedeagus curved in basal 1 / 3 in lateral view (Fig. 1 F); epinotal pieces of basal piece extending dorsad with acute apex (Fig. 1 H); parameres gradually contracted on two sides toward apex, cavate ventrally (Fig. 1 E, G), with apex distinctively, transversely expanded in lateral view (Fig. 1 F, H). Female (Fig. 1 C, D). Body length 14.5 mm, width 4.8 mm. Frons broadly, distinctively separated from epistome by arched forward fronto-epistomal impression, interocular distance about 0.32 ×, 0.17 × as long as eye diameter dorsally and ventrally, respectively, length ratios of antennomeres I – XI as 79: 23: 53: 57: 58: 58: 57: 56: 52: 44: 158, antennomere XI slightly longer than the combined length of three preceding antennomeres; prothorax about 1.02 × as long as wide, slightly wider than head, anterior angles acute; elytral length 2.38 × as long as width. Spiculum ventrale slender, fused distally (Fig. 3 B). 8 th abdominal sternite elongate, medially divided into two elongate sclerites (Fig. 3 B, D). Ovipositor (Fig. 3 A, C) with paraprocts elongate, 1.5 × as long as coxites, baculi of paraprocts longitudinal; 1 st coxite lobe short, with baculi transverse; gonostyli terminal; proctiger nearly 1.5 × as long as paraprocts, distal end of proctigeral baculi situated far before base of coxites. Female genital tube with a blind, large primary bursa copulatrix, oviduct and a short spermathecal gland, bursa copulatrix with a large sclerite (Fig. 3 A, E). Measurement. Males: body length 13.4–13.6 mm, body width 3.9–4.0 mm (N = 2); females: body length 14.7–15.0 mm, body width 4.8–5.0 mm (N = 3). Variability. Some specimens exhibit entirely brown elytra. In certain individuals, the anterior portions of pronotum are elevated, and the area between eyes is impunctate. Etymology. The specific epithet is derived from the Latin noun “ pennis ” (meaning “ elytron ”), referring to the setigerous tubercles on the elytra, in combination with the generic name; noun in apposition. Distribution. China: Guangdong, Guangxi, Yunnan, Hainan (distribution data based solely on photographic evidence, Fig. 4 D, E). Ecology. The three specimens from Yunnan were obtained by rearing larvae excavated from decaying logs (Fig. 4 A). The female specimen from Guangdong was collected at night on grass (Fig. 4 B). The female specimen from Guangxi was collected by shaking shrubs (Fig. 4 C).
Institution: Chongqing Normal University
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7081633965
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