Actinopus princeps Chamberlin, 1917

Figs 215–217, Map 17

Actinopus princeps Chamberlin, 1917: 31 (holotype ♀, Rio de Janeiro, Rio de Janeiro, Brazil, MCZ 5, examined); World Spider Catalog, 2020.

Note. The redescriptions below was based on images of the holotype, taken by E. H. Wienskosk and R. Saturnino .

Diagnosis. Females of A. princeps are recognized by the following combination of characters: bilobed receptacles, swelling laterally, with internal lobe slightly smaller than external lobe (Fig. 217 A–D); PME with the same size as PLE; carapace triangular and slightly rounded anteriorly (Fig. 215 B).

FEMALE (IBSP 114503): Total length 23.24; Carapace, long 9.21; wide 8.48. Carapace anterior part triangular and posterior part rounded. Anterior eye row procurved, posterior row recurved. Many long and short bristles between AME-clypeus, many widespread bristles in interdistances PME–PME and PLE–PLE. Short bristles between lateral eyes-edge of carapace (Fig. 215 B). Sternum with eight sigilla strongly fused medially (Fig. 215 C). Rastellum protuberant, rectangular, hirsute, with many short spines covering the dorsal surface of rastellum (Fig. 215 E–F). Subinguinal sulci with many denticles bordering prolateral row of teeth. Teeth of prolateral row decreasing in distal-proximal way; teeth of retrolateral row with three denticles forming parallel row (Fig. 215 D). Patella and tibia III with distal developed crowns of thorns (Fig. 216 A, B). Distal part of prolateral and retrolateral surfaces of patellae III with strong spines (Fig. 216 A). Tibia III with strong spines along retrolateral surface of article and patellae IV with the same spines at prolaterodorsal surface (Fig. 216 B–C). Tibia IV without spines on dorsal surface and with long bristles on prolaterodorsal surface (Fig. 216 D). Many robust spines on the ventral surface of the tarsi III and IV; And at prolateral and retrolateral surfaces of tarsi and metatarsi I and II. Carapace reddish-brown, with a conspicuous yellowish triangular region in the ocular region (Fig. 215 B). Sternum pale orange; chelicerae red-brown; legs with femora reddish-brown and the rest of articles clearest than femora; sternum slightly orange; And abdomen pale beige (Fig. 215 A). 18 labial cuspules, 105 on right maxilla and 163 on left. Eyes: Diameters: PME 0.51, PLE 0.47, ALE 0.48,AME 0.46; MOQ:Length 1.68,front width2.89, back width 1.01; Interdistances: PME–PME 2.26, PLE–PME 0.19, AME–AME 0.32, ALE–AME 0.87, ALE–PLE 0.83, AME–PME 0.87. Ocular area: OAL 6.77, OAW 5.35, and IF 3.68. Body: Clypeus: 0.38; Fovea: 3.94; Labium: long 2.48; wide 1.79; Chelicerae: long 5.53; wide 3.09; Sternum: long 6.32; wide 5.25. Abdomen: long 12.46; wide 9.66. Leg measurements: I: Fe 5.15/ Pa 3.15/ Ti 2.3/ Me 2.86/ Ta 1.54/ total 15. II: Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v5-22-23, d0, p0, r0-9-11; Me v0-4-3, d0, p3-5-5, r5-12-5; ta v2-2-3, d0, p2-2-3, r3-5-3. III: Fe v0, d0, p0, r0; Pa v0, d0-4-29, p0-1-0, r0-2-11; ti v2-9-13, d0- 1-15, p0-0-3, r0-9-12; Me v0-10-16, d10-6-5, p0, r0-5-9; ta v19-20-26, d0-0-4, p7-11-9, r1-7-4; IV: Fe v0, d0, p0, r0; Pa v0, d16-13-7, p2-0-0, r0; ti v0, d0, p0-0-1, r0; Me v0-0-3, d0-0-1, p0-1-3, r0; ta v7-9-16, d0-0-2, p7-9-12, r0. Spermathecae: Seminal receptacles longer than wide, with short ducts and a constriction in the middle. Lobes of external receptacles longest than internal lobes. In both receptacles, sclerotized region reaching the receptacles distal half (Fig. 217 A–D).

VARIATION

FEMALES (n=6): Eyes: Diameters: PME 0.24–0.51, PLE 0.32–0.52, ALE 0.29–0.6, AME 0.19–0.46; MOQ: Length 1.11–1.68, front width 0.73–3.05, back width 1.01–3.43; Interdistances: PME–PME 1.59–2.64, PLE–PME 0.19–0.23, AME–AME 0.15–0.45, ALE–AME 0.53–1.24, ALE–PLE 0.54–0.92, AME–PME 0.68–0.89. Ocular area: OAL 4.91–7.9, OAW 3.66–5.92, and IF 2.26–3.81. Body: Total length: 12.52–29.32; Carapace: Length 6.29–10.09; wide 5.99–10.27; Clypeus: 0.19– 0.53; Fovea: 2.42–4.24; Labium: Length 1.88–3.09; wide 1.41–2.16; Chelicerae: Length 3.91–6.69; wide 2.11–3.69; Sternum: Length 4.95–7.25; wide 4.1–6.16. Abdomen: Length 6.58–16.19; wide 5.72–12.07. Legs: I: Fe 2.19–6.08/ Pa 1.62–4.09/ Ti 1.25–2.53/ Me 1.1–3.62/ Ta 0.88–1.93/ total 7.04–18.21. II: 2.52–6.2/ 1.65–4.15/ 1.11–2.73/ 1.57–3.87/ 0.82–2.02/ 7.67–18.51. III: 3.29– 5.63/ 2.72–4.77/ 1.35–1.77/ 1.98–3.77/ 0.78–1.51/ 10.14– 17.17. IV: 4.63–7.69/ 2.86–4.92/ 2.57–4.47/ 2.86–4.72/ 1.2–2.13/ 14.09–23.56. Spermathecae: External lobes on each receptacle fluctuate in size than longer than internal lobes to the same size. The constriction in the middle of the receptacles can be pronounced (Fig. 217 A, D) or discrete (Fig. 217 B, C).

Distribution. BRASIL. Rio de Janeiro: Rio de Janeiro, Nova Friburgo, Itatiaia, Resende, Barra do Piraí, Piraí (Map 17).

Examined material. BRAZIL: Rio de Janeiro: [22º 54’ S 43º 12’ W], 3♀, viii.1986 (IBSP 114503, 123248, 123249); Nova Friburgo, [22° 17’ 13.5594” S 42° 32’ 0.9594” W], 1♀, ii.1981, P. Mix leg. (IBSP 104607); Itatiaia and Resende, [22º 19’– 22º 45’ S 44º 15’– 44º 50’ W], Parque Nacional de Itatiaia, 1♀, 02.iv.1995, C. Late leg. (IBSP 108889); Barra do Piraí, [22º 28’ S 43º 49’ W] , 3♀ (AMNH); Piraí, Bairro Varjão, [22º 37’ 46” S 43º 53’ 53” W], 1♀, 15.iv.2005, A. B. Vargas and R. P. Indicatti leg. (IBSP 114470) .