Glyphiulus fortis, Jiang & Chen & Xie, 2022

Jiang, Xuan-Kong, Chen, Hui-Ming & Xie, Zhi-Cai, 2022, Description of two new species of the genus Glyphiulus Gervais, 1847 (Diplopoda: Spirostreptida: Cambalopsidae) from southern China, Zootaxa 5141 (4), pp. 358-372 : 363-367

publication ID	https://doi.org/ 10.11646/zootaxa.5141.4.4
publication LSID	lsid:zoobank.org:pub:750CACB0-95E1-4404-B94D-ECAB53E9903C
DOI	https://doi.org/10.5281/zenodo.6598380
persistent identifier	https://treatment.plazi.org/id/222D87F0-6E79-9C75-FF56-F695FD691731
treatment provided by	Plazi
scientific name	Glyphiulus fortis
status	sp. nov.

Treatment

Glyphiulus fortis View in CoL sp. nov.

Figs 1A View FIGURE 1 , 3–5 View FIGURE 3 View FIGURE 4 View FIGURE 5

Type material. Holotype male, China: Guangxi Zhuang Autonomous Region, Bama County, Jiazhuan Town , Poyue Village , Baimo Cave , 24°17'58.33" N, 107°06'10.36" E, 331 m a.s.l., 29 May 2019, X.K. Jiang & H.M. Chen leg. GoogleMaps Paratypes: 16 males, 16 females and 8 juveniles, same data as holotype GoogleMaps .

Etymology. This specific name is derived from the Latin word fortis , meaning ‘strong, robust’ and refers to the shape of telopodites and coxosternal processes of the anterior gonopod, 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 ( Figs 3A View FIGURE 3 , 4A, B View FIGURE 4 ); (2) male legs I strongly degraded, two-segmented, distinctly shorter than the coxosternal process ( Fig. 5A View FIGURE 5 ); (3) the coxite process of the anterior gonopod strong and extremely prolonged ( Fig. 5C View FIGURE 5 ); (4) male femora VI and VII normal, without modifications. This species is very similar to G. impletus , but can be distinguished from the latter by the broader and stronger coxite process of the anterior gonopod.

Description. Body segments with 56–71p + 1–3a + T (holotype 71p + 1a + T). Body size of ca. 40–63 mm long and 2.0– 2.3 mm wide (holotype 63 and 2.3 mm, respectively). Color generally light yellowish brown ( Fig. 1A View FIGURE 1 ).

Head. Each eye patch with 18–22 pigmented eyes arranged in 2–4 irregular linear rows ( Fig. 3A View FIGURE 3 ). Antennae ( Figs 3A View FIGURE 3 , 4B View FIGURE 4 ) 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 developed, carinotaxic formula I–III + P + M ( Figs 3A View FIGURE 3 , 4A, B View FIGURE 4 ).

Body rings. Postcollum constriction modest ( Fig. 4A View FIGURE 4 ). Tegument smooth ( Figs 4A–E View FIGURE 4 ). Metatergal strongly crested, carinotaxic formula 2/2+I/i+3/3+I/i+2/2 ( Figs 3B–D, F View FIGURE 3 , 4A–E View FIGURE 4 ). Ozoporiferous tubercles with rounded tip, higher than broad, larger than other tubercles ( Figs 3B–D, F View FIGURE 3 , 4A–D View FIGURE 4 ). Lateral crests strong ( Figs 3B, D View FIGURE 3 , 4B, D View FIGURE 4 ). Midbody rings round in cross-section ( Fig. 3B View FIGURE 3 ).

Telson. Epiproct simple, with a rounded caudal ridge and a small dorsal tooth ( Figs 3F View FIGURE 3 , 4E View FIGURE 4 ). Paraprocts convex, oligotrichous ( Figs 3E View FIGURE 3 , 4F View FIGURE 4 ). Hypoproct crescent-shaped ( Figs 3E View FIGURE 3 , 4F View FIGURE 4 ).

Walking legs. Slender, distinctly longer than body width, with a fine accessory claw ( Fig. 3B View FIGURE 3 ).

Male sexual characters. Male legs I strongly reduced, 2 segmented, with a pair of medial coxosternal hooked processes in contact medially ( Fig. 5A View FIGURE 5 ). Femora VI and VII normal, without modification. Coxite of anterior gonopods ( Fig. 5C View FIGURE 5 ) subtriangular, ridged medially, with 3 or 4 lines of microsetae anteriorly. Coxite processes strong and extremely prolonged, with round tip, obviously longer than telopodites. Telopodites located laterally, one-segmented, thick, with several distal setae and a field of microsetae at base. Coxite of posterior gonopods ( Fig. 5D View FIGURE 5 ) brush-like mediolaterally. Flagella short, broad, zigzag-edged, situated at the tip of coxite lobe ( Fig. 5B, D View FIGURE 5 ). Lateral margin of coxite with a field of microsetae.

Ecology. This species is cavernicolous and inhabits Baimo Cave ( Fig. 1B View FIGURE 1 ). Since this species shows a degree of troglomorphic traits, like elongation of legs and antennae and general pallid coloration, this species seems to be a troglophile.

Distribution. Known only from the type locality.