Dysdera achaemenes sp. nov.

Figs 1A-C, 2A, B

Type material.

Holotype ♀ (ZMUT), Iran: Fars Province: Khanj, Khan Cave, 27°44'N, 53°20'E.

Etymology.

The specific epithet is a noun in apposition, referring to the apical ancestor of the Achaemenid dynasty of rulers of Persia.

Diagnosis.

The new species differs from its congeners occurring in the region by the very long receptacle (Re), longer than the posterior margin of the dorsal arch (Da) (vs. shorter).

Description.

Female. Habitus as in Fig. 1A-C. Total length 8.13. Carapace 3.28 long, 2.58 wide. Eye diameters: AME 0.12, PME 0.12, PLE 0.14. Carapace, sternum, chelicerae, labium, and maxillae reddish. Legs pale orange. Abdomen pale cream-coloured, without any pattern. Spinnerets uniformly pale cream-coloured. Measurements of legs: I: 8.77 (2.64, 1.56, 2.21, 1.78, 0.58), II: 8.49 (2.42, 1.44, 2.02, 2.08, 0.53), III: 6.54 (1.87, 0.99, 1.30, 1.92, 0.46), IV: 8.99 (2.51, 1.32, 2.07, 2.47, 0.62). Spination: I: Fe: 3pl. II: Fe: 1pl. III: Fe: 1pl; Ti: 4pl, 1rl, 6v; Mt: 3pl, 2rl, 6v. IV: Fe: 9d, 1rl; Ti: 4pl, 6v; Mt: 3pl, 2rl, 5v.

Endogyne as in Fig. 2A, B; length/width ratio ca. 2.6; receptacle slightly arched, 5 × longer than wide, anterior angles (Aa) rounded, not long; dorsal arch (Da) trapezoidal; transverse bar (Tb) as wide as receptacle, lateral edges (Le) directed posterolaterally; posterior diverticulum (Pd) hexagonal.

Male. Unknown.

Distribution.

Known only from the type locality in Fars Province, southern Iran (Fig. 35).