Glyphiulus impletus, Jiang, Xuankong, Guo, Xuan, Chen, Huiming & Xie, Zhicai, 2018

Jiang, Xuankong, Guo, Xuan, Chen, Huiming & Xie, Zhicai, 2018, Four new species of the Glyphiulusjavanicus group from southern China (Diplopoda, Spirostreptida, Cambalopsidae), ZooKeys 741, pp. 155-179 : 165-171

Glyphiulus impletus sp. n. Figs 1D, 17, 18, 19, 20, 21

Type material.

Holotype male, China: Guangxi Zhuang Autonomous Region, Lingyun County, Luolou Town, Geding Village, Longcitun, Guanyin Cave 24°24.700'N, 106°49.517'E, alt. 830 m, 4 Jan. 2017, X.K. Jiang, H.M. Chen & X. Guo leg. (IBGAS). Paratypes: 22 males, 26 females and 9 juveniles, same date and locality as holotype (IBGAS); 17 males, 14 females and 43 juveniles, Lingyun County, Luolou Town, Geding Village, Longweitun, Paifang Cave 24°24.884'N, 106°48.900'E, alt. 830 m, 4 Jan. 2017, X.K. Jiang, H.M. Chen & X. Guo leg. (IBGAS).

Other material examined.

Seven males, 6 females and 4 juveniles, Lingyun County, Sicheng Town, Shuiyuan Cave 24°21.992'N, 106°34.670'E, alt. 450 m, 3 Jan. 2011, H.M. Chen leg. (IBGAS); 17 males and 14 females, Lingyun County, Sicheng Town, Naling Cave 24°21.926'N, 106°33.911'E, alt. 500 m, 4 Jan. 2011, H.M. Chen leg. (IBGAS); 3 males and 1 female, Fengshan County, Yuanyang Cave 24°32.518'N, 107°03.768'E, alt. 640 m, 3 Jan. 2017, X.K. Jiang, H.M. Chen & X. Guo leg. (IBGAS); 1 male, 2 females and 1 juvenile, Nandan County, Bachuan Cave 25°03.966'N, 107°37.392'E, 31 Jan. 2017, H.M. Chen & C. Chen leg. (IBGAS); 17 males, 24 females and 24 juveniles, Donglan County, Xinyan Village, Qiumotun, Ganma Cave 24°26.784'N, 107°20.584'E, alt. 320 m, 2 Feb. 2017, H.M. Chen & C. Chen leg. (IBGAS).

Etymology.

This specific name is derived from the Latin word impletus , meaning ‘plentiful’, referring to the large number of specimens of the new species in our collections.

Diagnosis.

The new species can be diagnosed by the following combination of morphological characteristics: (1) all crests on collum complete and fully developed, carinotaxic formula I–III + P + M; (2) telopodite of male leg I bi-segmented, shorter than coxal process; (3) coxosternal mesal process of anterior gonopod slender and strongly prolonged; (4) flagellum of posterior gonopod short and zigzag-shaped. See also Key below.

Description.

Body segments with 71-82p + 1a + T (holotype 73p + 1a + T). Body ca. 51-66 mm long and 2.3-3.2 mm wide (holotype 64 mm and 3.0 mm, respectively).

Colouration. Brown to dark brown in vivo (Fig. 1D). In fixed condition, yellow-brown to red-brown, tergal crests dark red-brown to castaneous brown (Fig. 17 A–F).

Head. Each eye patch with 7-20 pigmented ocelli arranged in 1-3 irregular vertical rows (Fig. 17A, B). Antennae slender, 2.34-3.31 mm long. Terminal part of antennomeres V obviously expanded (Fig. 17B). Gnathochilarium with a separate promentum, polytrichous (Fig. 18A).

Collum. All crests on collum complete and fully developed, carinotaxic formula I–III + P + M (Fig. 17A, B).

Body segments. Postcollum constriction modest (Fig. 17A). Metaterga strongly crested (Fig. 17 A–E). Metatergal crests divided into two transverse rows of tubercles, carinotaxic formula 2/2+I/i+3/3+I/i+2/2. Anterior tubercle (except ozoporiferous one) small and upright, posterior one directed caudally, both tubercles with sharp tips (Fig. 17 A–E). Ozoporiferous tubercle round, higher than broad, obviously larger than other tubercles (Fig. 18E). Location of the tubercle behind ozopore relatively medial, set off from ozoporiferous tubercle in caudal view (Figs 17 B–E, 18E). Lateral crests well developed. Midbody rings round in cross-section (Fig. 18E), 1.88-2.42 mm high (vertical diameter) and 1.91-2.42 mm wide (horizontal diameter), the ratio of height to width 0.95-1.00.

Telson. Epiproct simple, with a rounded caudal ridge and a strong dorsal tooth. Paraprocts convex, polytrichous. Hypoproct crescent-shaped (Fig. 17E, F).

Walking legs. Slender, 2.52-3.41 mm long, longer than body width (Fig. 18E, F).

Male sexual characters. Telopodite of male legs I strongly degraded, bi-segmented (Fig. 18B). Penes rather small and oval (Fig. 18C). Male legs II and III modified as usual (Fig. 18C, D). Femora VI and VII normal, not inflated.

Anterior gonopods. Coxosternum shield-like, sunken medially. Coxosternal mesal process slender and strongly prolonged. Telopodite thin, curved with a rounded tip, and a field of microsetae at base (Figs 19A, 20A, 21A).

Posterior gonopods. Mediolateral margins of coxite brush-like. Flagella short and zigzag-shaped. Lateral margin with a field of microsetae (Figs 19B, 20B, 21B).

Distribution.

Known from the type locality and several caves scattered in northwestern Guangxi.