Glyphiulus hainanensis sp. nov.

Figs 1C, 6–8.

Type material. Holotype male, China: Hainan Province, Ledong County, Jianfengling Nature Reserve, Mingfenggu, 18°44'37.81" N, 108°50'40.06" E, 931 m a.s.l., 30 March 2018, X.K. Jiang leg. Paratypes: 1 male and 6 females, same data as holotype .

Etymology. This specific name is derived from the type locality, Hainan Island which is the second largest island in China, adjective.

Diagnosis. This species with contiguous processes on the coxosternum of the male first leg-pair belongs to the Glyphiulus javanicus -group, and it can be separated from other species in this group by (1) the crests on the collum being complete and developed, and the carinotaxic formula I–III + P + M (Fig. 6A); (2) male legs I 2 or 3 segmented, slightly longer than the coxosternal process (Fig. 7A); (3) the coxite process of the anterior gonopod prolonged strightly, with a sharp tip (Fig. 8A); (4) male femora VI and VII modified, with a tubercle distoventrally (Fig. 7B).

Description. Body segments with 59–70p + 1–4a + T (holotype 68p + 1a + T). Body size of ca. 44–57 mm long and 2.3–3.0 mm wide (holotype 54 and 2.6 mm, respectively). Color generally earthy yellow, with ozoporiferous tubercles light yellow (Fig. 1C).

Head. Each eye patch with 20–22 pigmented eyes arranged in two or three regular linear rows (Fig. 6A). Antennae (Fig. 6A) slender, densely setose. Antennomeres 1, 6–7 cylindrical, 2–5 clavate. Relative antennomere lengths 5≥3>4≥2≥6>1≥7. Labrum with four teeth anteromedially. Gnathochilarium with a separate promentum, polytrichous.

Collum. All crests complete and strong, carinotaxic formula I–III + P + M (Fig. 6A).

Body rings. Postcollum constriction modest. Tegument rough (Fig. 6C, D, F). Metatergal strongly crested, carinotaxic formula 2/2+I/i+3/3+I/i+2/2 (Fig. 6B–D). Ozoporiferous tubercles with rounded tip, as high as broad, larger than other tubercles (Fig. 6B–D). Lateral crests fully developed (Fig. 6B, D, F). Midbody rings round in cross-section (Fig. 6B).

Telson. Epiproct simple, with a rounded caudal ridge and a small dorsal tooth (Fig. 6F). Paraprocts convex, polytrichous (Fig. 6E, F). Hypoproct crescent-shaped (Fig. 6E).

Walking legs. Slender, nearly as long as body width, densely setose, with a fine accessory claw (Figs 6B, 7C).

Male sexual characters. Male legs I strongly reduced, 2 or 3 segmented, with a pair of medial coxosternal hooked processes in contact medially (Fig. 7A). Femora VI and VII inflated, possess a small tubercle distoventrally (Fig. 7B). Coxite of anterior gonopods (Fig. 8A) shield-like, ridged medially, with 1 or 2 lines of microsetae anteriorly. Coxite processes prolonged straightly, with sharp tip, obviously longer than telopodites. Telopodites located laterally, one-segmented, slender, digitiform, with several distal setae and a field of microsetae at base. Coxite of posterior gonopods (Fig. 8B) with a medial lamelliform lobe and two rows of strong, curved setae at mediolateral margin. Flagella short, slender, and zigzag-edged, situated at the tip of coxite lobe. Lateral margin of coxite with a round field of microsetae.

Ecology. This species is epigean and was found in the litter layer of a deciduous forest (Fig. 1D).

Distribution. Known only from the type locality.