Psiloderces gawanaensis
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Ordo: Araneae
Familia: Psilodercidae
Genus: Psiloderces
Name
Psiloderces gawanaensis Li & Chang sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
Types
Holotype: ♂ (IZCAS), Philippines, Luzon Island, Mountain Province, Bontoc Town, road to Gawana Town, 17°3.6396'N, 121°3.0402'E, 1674 m, 26.V.2015, F. Ballarin & Y. Li. Paratype: 1♀ (IZCAS), same data as holotype.
Etymology
The species name is an adjective referring to the type locality.
Diagnosis
Males of P. gawanaensis sp. nov. can be distinguished from congeners by the human heart-shaped bulb (inverted pyriform) (Fig. 4B) bearing a threadlike embolus, the presence of 4 distinct bristles on the cymbial protrusion, and the clypeal projection bearing a few setae (Fig. 4C, D) (vs. absence or less than 4 bristles on cymbial protrusion); females can be differentiated from congeners by the widely spaced, horseshoe-shaped spermathecae (Fig. 3A).
Description
Male (Holotype). Total length 1.54; carapace 0.60 long, 0.63 wide; abdomen 0.94 long, 0.56 wide. Carapace wider than long, brown, with 3 longitudinal dark brown bands, median band half length of carapace, median band two times wider than lateral band (Fig. 3D). Chelicerae pale brown (Fig. 28F). Clypeus dark brown, with long and slightly bent medial projection, bearing few setae apically (Fig. 3C, D). Endites dark brown. Labium dark brown delimiting pair of light brown circular spots. Sternum dark brown, delimiting light brown band medially. Abdomen elongated, dorsum with brown stripes, antero-ventrally brown with elliptical patch, posterior part with indistinct brown pattern. Legs uniformly brown; measurements: I 5.21 (1.33, 0.25, 1.63, 1.20, 0.80), II 4.03 (1.09, 0.20, 1.25, 0.94, 0.55), III 3.49 (0.94, 0.20, 0.94, 0.86, 0.55), IV 4.88 (1.25, 0.25, 1.38, 1.25, 0.75). Palp (Fig. 4A–D): femur slender, 4 times longer than patella; patella not swollen; tibia 3 times shorter than femur; cymbium purplish distally, 2 times shorter than wide, and 2 times wider than femur, protrusion with 4 distinct bristles basally and anteriorly; bulb light brown, inverted pyriform with threadlike embolus arising distally (Fig. 4B).
Female (Paratype). General features and coloration similar to those of male (Fig. 3E, F). Measurements: total length 1.64; carapace 0.70 long, 0.60 wide; abdomen 0.94 long, 1.20 wide. Leg measurements: I 5.23 (1.25, 0.25, 1.60, 1.25, 0.88), II 4.30 (1.10, 0.20, 1.30, 1.00, 0.70), III missing, IV 5.24 (1.30, 0.23, 1.60, 1.33, 0.78). Endogyne (Fig. 3A): encircled spermathecae resemble a horseshoe, curving downwards (Fig. 3A).
Distribution
Known only from the type locality (Fig. 30).
Original Description
- Chang, W; Li, S; 2020: Fourteen new species of the spider genus Psiloderces Simon, 1892 from Southeast Asia (Araneae, Psilodercidae) ZooKeys, 902: 61-105. doi
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