Actinopus vilhena, sp. nov.

Actinopus vilhena sp. nov.

Figs 73–75, Map 5

Type material. Holotype male from [12° 44’ S 60° 07’ W], Vilhena, Rondônia, Brazil, ix.1999, M. Carvalho leg. (IBSP 114440). Paratype: BRAZIL. Mato Grosso do Sul: Corumbá, [19° 00’ S 57° 39’ W], 1♂ (IBSP 110559).

Etymology. The specific name is a noun in apposition from the type locality name., Vilhena, Rondônia.

Diagnosis. Male resemble those of A. nattereri (Figs 63 A, 67 E), A. itapitocai (Fig. 79 A), A. itaqui (Fig. 89 A) and A. caxiuana (Fig. 98 A) by the bluish-gray coloration on the dorsal abdomen (Fig. 73 A); it resembles those of A. nattereri (Fig. 37 A–D), A. harveyi (Fig. 78 A–C), A. itapitocai (Fig. 83 A–C), A. xingu (Fig. 94 A–C) and A. utinga (Fig. 103 A–C) by BTA displaced dorsally in relation to a middle longitudinal line along the prolateral tegular surface (Fig. 75 A); they resemble those of A. nattereri, A. xingu and A. utinga by the keels contiguous, close to each other, as seen in prolateral view (Fig. 75 A). The male resembles those of A. harveyi, A. itapitocai, A. itaqui (Fig. 91 A–C), A. xingu and A. utinga by PA continuous to PI (Fig. 75 A) and differ from those of all other species of the group nattereri by the non-overlapping keels and by the elongated, thin tegulum (Fig. 75 A–C).

MALE (IBSP 114440): Total length 17.38; Carapace, long 6.12; wide 5.62. Carapace anterior part tapering, posterior part rounded. Anterior eye row slightly procurved, posterior row recurved (Fig. 73 B). Without bristles between AME-clypeus, between ALE–ALP, and wih short bristles between posterior eyes-fovea and lateral eyes-edge of carapace. Sternum with eight sigilla fused medially, two distal sigilla more fused than others (Fig. 73 C). Rastellum protuberant, inverted V-shaped, hirsute, without spines apically (Fig. 73 E–F). Chelicerae with 4–9 denticles along prolateral row of teeth. Prolateral row five megateeth. Retrolateral row with five megateeth and two denticles between three distal and two basal megateeth (Fig. 73 D). Patella and tibia III with distal crown of welldeveloped thorns, not interrupted in middle (Fig. 74 A–B). Patellae III and IV with spines on prolaterodorsal face (Fig. 74 A, C). Tibia IV without spines on dorsal surface (Fig. 74 D). Ventral pseudoscopulae occupying 30% of tarsus I, 50% of II and 100% of III and IV. Pseudoscopula of tarsi I and II with setae spaced, forming diffuse group of bristles; On tarsi III and IV, compact. Carapace, chelicerae, sternum, coxae, trochantera, femora, patellae, tibiae, metatarsi and tarsi dark brown; abdomen gray, hirsute (Fig. 73 A). Eyes: Diameters: PME 0.24, PLE 0.44, ALE 0.56, AME 0.36; MOQ: Length 1.24, front width 3.32, back width 2.92; Interdistances: PME–PME 1.76, PLE–PME 0.28, AME–AME 0.24, ALE–AME 0.92, ALE–PLE 1.24, AME–PME 0.52. Ocular area: OAL 6.25, OAW 4.37, and IF 4. Body: Clypeus: 0.37; Fovea: 2.62; Labium: long 1.25; wide 1.25; Chelicerae: long 3.5; wide 2.12; Sternum: long 6.37; wide 4.5. Abdomen: long 7.5; wide 5. Leg measurements: I: Fe 7/ Pa 2.87/ Ti 3.87/ Me 5/ Ta 2.5/ total 21.25. II: 6.5/ 3.12/ 3.75/ 5/ 2.75/ 21.12. III: 5.25/ 3/ 2.87/ 5.12/ 2.87/ 19.12. IV: 7.12/ 3.25/ 5.87/ 6.12/ 3/ 25.37. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v1-1-1, d0, p0, r0; Me v1- 1-3, d0, p0, r3-6-2; ta v0-6-2 d0, p0-0-2, r0. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0, r0; Me v2-1-3, d0, p5-5-0, r0-1-3; ta v1-2-3, d0, p3-4-6, r1-3-6. III—Fe v0, d0, p0, r0; Pa v0-0-1, d3-4-18, p2-0-4, r0-0-2; ti v0-0-5, d1-0-13, p0-0-4, r0-5-3; Me v1-1-5, d2-0-0, p2-0-0, r0-1- 3; ta v0, d0, p0-3-3, r0-2-2; IV—Fe v0, d0, p0, r0; Pa v0- 1-2, d13-6-0, p2-1-0, r0; ti v0-0-3, d0, p0, r0; Me v2-2-3, d0, p0, r0; ta v0, d0, p0-1-9, r0-3-2. Palp: PA developed; thin, flattened embolus with three keels (PAc, PI and PS), equally spaced, without overlapping. serrated area. PA contiguous to PI in prolateral view. BTA well developed, displaced dorsally in relation to middle longitudinal line along prolateral tegular surface (Fig. 75 A–C).

Distribution. BRAZIL. Rondônia: Vilhena. Mato Grosso do Sul: Corumbá (Map 5).