Figs 136–138, Map 7
Type material. Holotype male from [06° 23’36” S 48° 33’ 41” W], Serra das Andorinhas, S„o Geraldo do Araguaia, Pará, Brazil, 27.X–07.xi.2011, T. C. S. Ávila-Pires, M. S. Hoogmoed & A. C. M. Dourado leg. (MPEG, 1♁ removed for SEM). Paratypes: BRAZIL. Piauí: José de Freitas, Fazenda Nazareth, Plot 1, 04º 47’ 06.2” S 042º 38’ 16.3” W, 1♁, 31.i.2004, V. O. Costa leg. (MPEG 2243, 2244); Uni„o, [04° 35’ S 42° 51’ W], Área da Empresa COMVAPI LTDA, 1♁ (MPEG). Tocantins: Ipueira, 11º 45’ S 48º 26’ W, 1♁, 28.x–04.xi.2001, I. Knyzak & R. Martins leg. (IBSP 111677, 111678, 111679, 111680, 111681).
Etymology. The specific name is in honor of musician Ronald James Padavona or Ronnie James Dio, one of Black Sabbath vocals, affiliated to several bands of heavy metal in addition to his solo career.
Diagnosis. Males of A. dioi differ from those of A. osbournei (Fig. 135 A–C) by the palpal tibia paler than other articles; PA inconspicuous; tegulum longer; cusps of serrated area present along length of embolus; embolus flattened (Fig. 138 A–C).
MALE (MPEG): Total length 9.5; Carapace, long 4.58; wide 4.66. Carapace anterior part tapering. Anterior eye row slightly procurved, posterior row recurved (Fig. 136 B). With one long bristle and many short/weak bristles forming a row on the border of clypeus. With few, short and weak bristles between ALE–ALP, between posterior eyes-fovea and lateral eyes-edge of carapace. Sternum with eight sigilla converging to the middle, but separated, two basal sigilla bigger and more fused than others (Fig. 136 C). Rastellum protuberant, digitiform, hirsute, without spines apically (Fig. 136 E–F). Chelicerae with 12 denticles along prolateral row of teeth. Prolateral row with five megateeth and two teeth on basal portion. Retrolateral row with seven megateeth (Fig. 136 D). Patella and tibia III with distal crown of well-developed thorns, on patella III interrupted in middle and on tibia III not interrupted in middle (Fig. 137 A–B). Patellae III and IV with spines on prolaterodorsal face (Fig. 137 A, C). Tibia IV without spines on dorsal surface and two rows of filiform trichobothria on dorsal surface (Fig. 137 D). Ventral pseudoscopulae occupying 50% of tarsus I, 70% 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 and tibiae dark brown; Metatarsi and tarsi dark brown, paler than other articles; Abdomen gray (Fig. 136A). Eyes: Diameters: PME 0.25, PLE 0.34, ALE 0.41, AME 0.31; MOQ: Length 0.87, front width 2.62, back width 2.31; Interdistances: PME–PME 1.41, PLE–PME 0.09, AME–AME 0.16, ALE–AME 0.69, ALE–PLE 0.37, AME–PME 0.41. Ocular area: OAL 3.67, OAW 2.67, and IF 2.42. Body: Clypeus: 0.17; Fovea: 2; Labium: long 1.08; wide 1; Chelicerae: long 2.92; wide 1.58; Sternum: long 3.33; wide 2.67.Abdomen: long 4.67; wide 3.67. Leg measurements: I: Fe 5/ Pa 2.25/ Ti 3.33/ Me 4.17/ Ta 2.42/ total 17.17. II: 4.83/ 2.08/ 3.25/ 4.25/ 2.42/ 16.83. III: 3.33/ 2.25/ 2.08/ 4.17/ 2.33/ 14.17. IV: 5.17/ 2.25/ 4.33/ 4.67/ 2.58/ 19. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v1- 2-5, d0, p0-0-2, r0-0-1; Me v5-5-5, d0, p3-5-5, r4-5-5; ta v1-1-2, d0, p1-3-2, r2-3-4. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0-6-8, d0, p0-0-1, r0-0-4; Me v3-6-6, d0, p1-4-5, r0-2-3; ta v1-1-6, d0, p3-3-2, r0-1-3. III—Fe v0, d0, p0, r0; Pa v0, d7-12-21, p0-0-1, r0-0-2; ti v0-0-3, d0- 1-16, p0-0-2, r0-1-5; Me v3-3-3, d0-1-3, p4-4-3, r3-3-6; ta v0-0-4, d0, p1-2-3, r1-3-2; IV—Fe v0, d0, p0, r0; Pa v0, d17-9-2, p0, r0; ti v0, d0, p0, r0-0-1; Me v0-0-2, d0- 0-1, p0-0-1, r0-0-1; ta v0-3-1, d0, p0-0-4, r1-1-1. Palp: PA developed, embolus with three keels (PAc, PI and PS). BTA developed and placed medially on prolateral tegular surface; serrated area developed, represented by many cusps below PAc in prolateral view; thin and elongated tegulum, thin embolar base. PS reaching the embolar edge on dorsal view (Fig. 138 A–C).
Distribution. BRAZIL. Piauí: José de Freitas, Uni„o, Caracol; tocantins: Ipueira; and Pará: S„o Geraldo do Araguaia (Map 7).
Examined material. BRAZIL. Piauí: Uni „o, [04° 35’ S 42° 51’ W], Área da Empresa COMVAPI LTDA, 2♁, 2006, J. Queiroz leg. (CHNUFPI 29); Caracol, Parque Nacional da Serra das Confusıes, PPBio Semiárido, 09° 13’ 16” S 43° 29’ 21” W, 1♁, x.2006, P. R. R. Silva et al. leg. (CHNUFPI 6, 25, 194).