Tachycines (Tachycines) nigrocorporis Hong & Huang & Luo 2022, sp. nov

Tachycines (Tachycines) nigrocorporis sp. nov. (Figs. 1, 2) Description. Male. Body large-sized (Figs. 1A–C). Vertex of head divided into two conical tubercles, bases of the well-developed tubercles drawn together, obtusely rounded apices separated (Fig. 1D). Eyes oval, protruding forward; median ocellus distinct, situated between antennal sockets (Fig. 1D). Anterior margin of pronotum straight, posterior margin slightly protruding backward, ventral margin arcshaped; posterior margin of mesonotum distinctly protruding backward; posterior margin of metanotum slightly protruding backward (Fig. 1E). Legs long and slender; coxae with small medial projections.Fore femur about 1.8 times longer than the pronotum, ventrally unarmed, internal genicular lobe with 1 long spine, external genicular lobe with 1 small spine; fore tibia ventrally with 2–3 inner spines and 1 outer spine, apex with 1 small outer spine on dorsal surface and 1 pair of long spines on ventral surface, between the paired ventral spines with 1 small spine. Middle femur ventrally unarmed, internal and external genicular lobes with 1 long spine respectively; middle tibia ventrally with 1 inner spine and 1 outer spine, apex with 1 pair of dorsal spines and 1 pair of ventral spines, between the paired ventral spines with 1 small spine. Hind femur ventrally with 3–4 inner spines and without outer spine; hind tibia dorsally with 64–66 inner spines and 61–64 outer spines, arrange in groups, ventral and dorsal surface with a pair of small sub-apical spines respectively, apex with 1 pair of long dorsal spines and 1 pair of long ventral spines; the longest dorso-apical spine not exceeding the dorso-apical spine of hind metatarsus (Fig. 1F). Hind metatarsus keeled beneath (Fig. 1F). Epiphallus of male genitalia rectangular and with many denticles on surface, the anterior angles of epiphallus slightly extended, the posterior angles obviously extended and elongated; median lobe of genitalia with 2 pairs of apical lobules and distinct lateral sclerites, dorsal surface with 1 large triangular sclerite; membranous ventral lateral lobes of genitalia slightly longer than dorsal ones (Figs. 1G, H). Female. General appearance similar to that of male (Figs. 2A–C), but hind femur ventrally with 4–5 inner spines. Ovipositor shorter than half the length of hind femur; base of ovipositor broad, narrowing to apex; apex pointed and slightly curved upwards; almost indistinct denticles on ventral edge of distal part of inferior valves (Fig. 2D). Subgenital plate rather small, with hind margin rounded (Fig. 2E). Coloration. Body uniformly black without distinct stripes. Face light brown with 2 black longitudinal stripes under eyes and antennas; antennal flagellum yellowish-brown. Legs brown with black stripes. Material examined. Holotype: 1♂, Tianba Town, Fenggang County, Zunyi City, Guizhou Province, 21.IX.2021, coll. Ben Hong, Bing Li, Kesong Yin. Paratypes: 1♂, 2♀, same data as the holotype. Measurements (mm). Body: ♂ 25.21–30.31, ♀ 26.52–27.04; pronotum: ♂ 7.99–8.08, ♀ 7.91–8.30; fore femur: ♂ 12.95–15.45, ♀ 14.90–15.15; hind femur: ♂ 28.42–28.61, ♀ 29.61–30.50; hind tarsus: ♂ 10.65–12.24, ♀ 11.76– 11.97; ovipositor: ♀ 10.70–12.38. Distribution. China (Guizhou). Discussion. This new species is unique in the subgenus Tachycines (Tachycines) due to the following character of male genitalia: the dorsal surface of the median lobe with 1 large triangular sclerite. This morphological feature of male genitalia can be applied to distinguish this new species from all other species of Tachycines (Tachycines). Etymology. The name of the new species refers to the black coloration of the body.
Published as part of Hong, Ben, Huang, Shihui & Luo, Changqing, 2022, Description of a new species of the subgenus Tachycines (Tachycines) (Rhaphidophoridae: Aemodogryllinae: Aemodogryllini) from Guizhou, China, pp. 497-500 in Zootaxa 5209 (4) on pages 498-499, DOI: 10.11646/zootaxa.5209.4.9, http://zenodo.org/record/7333999