Psiloderces xichang 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/A219F896-1005-440F-B783-6E8A08B3252E
taxon LSID	lsid:zoobank.org:act:A219F896-1005-440F-B783-6E8A08B3252E
treatment provided by	ZooKeys by Pensoft
scientific name	Psiloderces xichang Li & Chang
status	sp. nov.

Treatment

Psiloderces xichang Li & Chang View in CoL sp. nov. Figs 8 View Figure 8 , 9 View Figure 9 , 28G View Figure 28 , 30 View Figure 30

Types.

Holotype: ♂ (IZCAS), Philippines, Luzon Island, Rizal Province, Quezon City, Rodriguez area, Montalban Village, Pamitinan Cave, 14°43.7916'N, 121°11.3580'E, 102 m, 5.VI.2015, F. Ballarin & Y. Li. Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin “xìcháng” (slender and long) and refers to the extremely slender palp structures.

Diagnosis.

Diagnostic features of males and females are discussed in the diagnosis of P. cuyapoensis sp. nov.

Description.

Male (Holotype). Total length 2.00; carapace 0.70 long, 0.90 wide; abdomen 1.30 long, 1.00 wide. Carapace round and brown, with 2 longitudinal dark brown bands laterally, medially with dark brown line (Fig. 8D View Figure 8 ). Chelicerae brown (Fig. 28G View Figure 28 ). Clypeus dark brown, with long, slightly bent medial projection, bearing few setae (Fig. 8C, D View Figure 8 ). Endites dark brown, light brown basally. Labium dark brown delimiting pair of light brown circular dots. Sternum dark brown, delimiting light brown band medially. Abdomen elongated, dorsum with complex brown patterns, antero-ventrally dark brown with pair of circular patches followed by semi-circular patch, posterior with indistinct dark brown and light brown patterns. Legs uniformly brown; measurements: I 10.30 (2.80, 0.25, 3.20, 2.80, 1.25), II 8.91 (2.40, 0.31, 2.60, 2.60, 1.00), III 6.23(1.72, 0.25, 1.75, 1.63, 0.88), IV 9.34 (2.25, 1.00, 2.66, 2.34, 1.09). Palp equally wide throughout its length (Fig. 9A-D View Figure 9 ): femur extremely slender, 6 times longer than patella; patella not swollen; tibia 2.50 times shorter than femur; cymbium 2 times shorter than femur, protrusion with 2 distinct bristles basally and anteriorly; bulb pale brown, bulging pyriform with embolus arising distally; embolus irregular, resembles a petal (Fig. 9A View Figure 9 ).

Female (Paratype). General features and coloration similar to those of male (Fig. 8E, F View Figure 8 ). Measurements: total length 2.16; carapace 0.75 long, 0.86 wide; abdomen 1.41 long, 1.02 wide. Leg measurements: I 9.66 (2.60, 0.31, 3.00, 2.66, 1.09), II 7.91 (2.13, 0.31, 2.34, 2.19, 0.94), III 6.63 (1.63, 0.25, 1.50, 1.50, 1.75), IV 10.96 (2.80, 0.31, 3.60, 3.00, 1.25) Endogyne (Fig. 8A View Figure 8 ): widely spaced, earlobe-like spermathecae, ratio of spermathecae interdistances and spermathecae width 1:4 (Fig. 8A View Figure 8 ).

Distribution.

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