Psiloderces grohotensis Li & Chang, 2020

Chang, Wan-Jin & Li, Shuqiang, 2020, Fourteen new species of the spider genus Psiloderces Simon, 1892 from Southeast Asia (Araneae, Psilodercidae), ZooKeys 902, pp. 61-105 : 61

publication ID	https://dx.doi.org/10.3897/zookeys.902.38967
publication LSID	lsid:zoobank.org:pub:2DB04880-0FB8-48BF-AAF3-5EC2176F8D6E
persistent identifier	https://treatment.plazi.org/id/15F30792-C43A-4D79-AC45-18836A3B24E5
taxon LSID	lsid:zoobank.org:act:15F30792-C43A-4D79-AC45-18836A3B24E5
treatment provided by	ZooKeys by Pensoft
scientific name	Psiloderces grohotensis Li & Chang
status	sp. nov.

Treatment

Psiloderces grohotensis Li & Chang sp. nov. Figs 18 View Figure 18 , 19 View Figure 19 , 29D View Figure 29 , 30 View Figure 30

Types.

Holotype: ♂ (IZCAS), Indonesia, East Kalimantan, Tanah Grohot, 1°48.6260'S, 115°51.1250'E, 62 m, 20.VIII.2017, H. Liu & Z. Chen. Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is an adjective referring to the type locality.

Diagnosis.

Males of P. grohotensis sp. nov. can be distinguished from all other species of the genus by the structure of the bulb which has 2 bulges, and a laminar apophysis connected to the embolus (Fig. 19B View Figure 19 ) (vs. one bulge or absent); the female can be distinguished by transversal, tubular spermathecae resembling caterpillars (Fig. 18A View Figure 18 ) (vs. the absence of transversal, tubular spermathecae).

Description.

Male (Holotype). Total length 1.30; carapace 0.50 long, 0.60 wide; abdomen 0.80 long, 0.50 wide. Carapace round and pale brown, with trident dark brown stripes medially and dark brown bands laterally (Fig. 18C View Figure 18 ). Chelicerae pale brown (Fig. 29D View Figure 29 ). Clypeus slanting, dark brown. Endites dark brown, light brown basally. Labium dark brown, delimiting pair of light brown circular dots. Sternum dark brown. Abdomen elongated, dorsum with indistinct brownish stripes, antero-ventrally with pair of circular dark brown patches followed by elliptical light brown patch, posterior dark brown, delimiting light brown dotted vertical lines laterally and V-shaped medially. Legs uniformly brown; measurements: I 7.47 (2.00, 0.20, 2.25, 2.00, 1.02), II 5.85 (1.60, 0.20, 1.75, 1.50, 0.80), III 4.10 (1.09, 0.16, 1.20, 1.10, 0.55), IV 6.00 (1.60, 0.20, 1.80, 1.60, 0.80). Palp (Fig. 19A-D View Figure 19 ): femur slender, 4 times longer than patella; patella not swollen; tibia 2.5 times shorter than femur; cymbium 1.5 times shorter than femur, protrusion darkens distally; bulb pale brown, diamond-shaped with embolus and laminar apophysis located distally; embolus thin, connected basally with laminar apophysis; 2 acute bulges directed ventrally (Fig. 19B View Figure 19 )

Female (Paratype). General features and coloration similar to those of male (Fig. 18D, E View Figure 18 ). Measurements: total length 1.49; carapace 0.47 long, 0.55 wide; abdomen 1.02 long, 0.78 wide. Leg measurements: I 3.96 (1.30, 0.16, 1.50, 1.30, 0.70), II 4.91 (1.25, 0.16, 1.50, 1.30, 0.70), III 3.89 (1.00, 0.13, 1.13, 1.00, 0.63), IV 5.41 (1.38, 0.13, 1.70, 1.40, 0.80). Endogyne (Fig. 18A View Figure 18 ): spermathecae tubular, elongate mesally, median tips pointed, lateral ends rounded, receptacles separated by about 3 diameters (Fig. 18A View Figure 18 ).

Distribution.

Known only from the type locality (Fig. 30 View Figure 30 ).