Actinopus coboi

Description. (Figs 2 A – E). Female holotype (MNHN 1372). Total length: 16.00. Carapace (Fig. 2 A): length 5.30, width 5.00; with 12 bristles on each lobe of the posterior margin (Fig. 2 A); cephalic region: length 3.20, width 4.40; clypeus small with 15 bristles, 11 on chillum; 10 bristles between PME, 5 behind each PME-PLE, 6 bristles and one larger on both sides of ocular group. Fovea: length 0.80, width 2.50. Eyes, diameters and interdistances: AME 0.16, ALE 0.42, PME 0.21, PLE 0.26, ocular group 1.00, anterior width 2.75, 2.54 posterior width; AME-ALE 0.75, PME- PLE 0.21, AME-PME 0.47, ALE-PLE 0.53, AME-AME 0.16. Chelicerae: Length 2.80, width 1.90, cheliceral apex with 15 recumbent and elongated bristles covering base of fang. Rastellum with 11 marginal, blunt spines and 7 small dorsal. Cheliceral furrow (Fig. 2 C) with 6 promarginal and 7 retromarginal teeth and 9 denticles in furrow, near promargin. Labium: length 0.84, width 1.11, with 10 anterior cuspules. Maxillae: anterior length 1.85, posterior length 2.12, width 1.59, with ~ 60 cuspules 1: 3 V ANT, expanding to anterior face. Sternum: Center flat (Fig. 2 B), length: 4.03, maximum wide 3.29, minimum width 1.11. Postlabial sigilla deep, posterior ones shallow, well defined. Abdomen: length 8.00, covered by dark bristles. PMS: length 0.79; PLS with basal: medial: apical articles 0.79: 0.32: 0.16. Spigots: 2 large, 30 small on PMS; PLS, numbers of large (small) spigots on basal: medial: apical article 3 (35): 2 (30): 0 (~ 60). Lengths of legs and palp: I: 3.18, 1.85, 1.32, 1.85, 0.95, 9.15. II: 2.91, 2.12, 1.48, 1.85, 0.90, 9.26. III: 3.18, 2.38, 0.52, 2.38, 0.52, 8.98. IV: 3.71, 2.27, 2.38, 2.38, 0.52, 11.27. Palp: 2.91, 1.85, 2.12, –, 2.12, 10.10.

urn: lsid: zoobank. org: act: B 52295 FA- 6839 - 487 E- 974 B- 7 D 79 F 663 C 177

Diagnosis. The female of A. coboi can be distinguished from those of all other species in the genus by the shape of their spermathecae (Fig. 2 D) with an apical lobe diagonally directed; similar to that of A. indiamuerta from which it differs by the more numerous retrolateral spines on tibia II and the labium shape (Fig. 2 B, E). Males are unknown.

Etymology. The specific epithet is a patronym in honour of my friend, Rafael Cobo.

Other material examined. Known only from the type specimen.

Type material. Uruguay: Colonia. Holotype ♀: Cerros de San Juan [34 ° 13 ′ S 57 ° 55 ′ W], 30 September 1984, E. Gudynas, G. Skuk & J. C. Gambarotta (MNHN 1372).