Psiloderces heise 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/301F1310-5C27-488B-A335-2C26D5CFCC9B
taxon LSID	lsid:zoobank.org:act:301F1310-5C27-488B-A335-2C26D5CFCC9B
treatment provided by	ZooKeys by Pensoft
scientific name	Psiloderces heise Li & Chang
status	sp. nov.

Treatment

Psiloderces heise Li & Chang View in CoL sp. nov. Figs 1 View Figure 1 , 2 View Figure 2 , 28C View Figure 28 , 30 View Figure 30

Types.

Holotype: ♂ (IZCAS), Philippines, Luzon Island, Tarlac Province, Tarlac City, near Monasterio de Tarlac, 15°26.8998'N, 120°25.6710'E, 123 m, 20.V.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 “hēisè” (black) and refers to the unique black color of the embolus.

Diagnosis.

Males of P. heise sp. nov. can be distinguished from all other species of the genus by the structure of the bulb with a distinct prolateral indentation (Fig. 2C, D View Figure 2 ), a cymbial protrusion with a right-angled attachment (Fig. 2C View Figure 2 ), and the thick and dark embolus (vs. the absence of an indentation, a right-angled attachment, and different colored embolus in congeners); females can be differentiated from congeners by a pair of horizontally stalked spermathecae that width almost equally wide with globose distal part (Fig. 1A View Figure 1 ).

Description.

Male (Holotype). Total length 1.46; carapace 0.56 long, 0.63 wide; abdomen 0.90 long, 0.70 wide. Carapace round and brown, with 3 longitudinal dark brown bands, median band half length of carapace, lateral bands eight times wider than median band (Fig. 1C View Figure 1 ). Chelicerae pale brown (Fig. 28C View Figure 28 ). Clypeus slanting, brown. Endites brown. Labium dark brown. Sternum dark brown, delimiting light brown band medially. Abdomen elongated, dorsum with purplish stripes posteriorly, antero-ventrally brown with pair of circular patches followed by semi-circular patch, posterior half with indistinct brown and light brown patterns. Legs uniformly brown; measurements: I 3.86 (1.00, 0.20, 1.09, 1.02, 0.55), II 4.38 (1.25, 0.20, 1.20, 1.10, 0.63), III 3.75 (1.00, 0.25, 1.00, 1.00, 0.50), IV 5.31 (1.41, 0.20, 1.60, 1.40, 0.70). Palp (Fig. 2A-D View Figure 2 ): femur slender, 3 times longer than patella; patella not swollen; tibia 2 times shorter than femur but almost as wide as cymbium; cymbium pale, 2 times wider than femur but almost as long as femur, cymbial protrusion with right-angled stick-out attachment and distinct bristles basally and anteriorly; bulb light yellow, pyriform, with slight indentation promarginally, laminar apophysis and embolus arise distally; laminar apophysis not separated from embolus basally, shorter than embolus; embolus thicker and darker than laminar apophysis, bent apically (Fig. 2B View Figure 2 ).

Female (Paratype). General features and coloration similar to those of male (Fig. 1D, E View Figure 1 ). Measurements: total length 1.40; carapace 0.50 long, 0.47 wide; abdomen 0.90 long, 0.63 wide. Leg measurements: I 4.16 (1.10, 0.16, 1.25, 1.02, 0.63), II 3.45 (0.90, 0.20, 0.94, 0.86, 0.55), III 3.72 (1.00, 0.13, 1.10, 1.02, 0.47), IV 2.81 (0.70, 0.16, 0.78, 0.70, 0.47). Endogyne (Fig. 1A View Figure 1 ): transverse stalked spermathecae bearing globose distal parts, heads almost as wide as stalks, stalks 10 times longer than heads.

Distribution.

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