Actinopus longipalpis C. L. Koch, 1842

Figs 154–156, Map 8

Actinopus longipalpis C. L. Koch, 1842: 102, fig. 754 (holotype ♂, [34º 53’ 55”S 56º 10’ 01”W], Montevideu, Uruguay, ZMB 2107, examined); Ríos-Tamayo & Goloboff, 2018: 49, fig. 23 A–I, 24 A–D, 44; World Spider Catalog, 2020.

Diagnosis. Males of Actinopus longipalpis resembles A. pindapoy (Fig. 159 A–C) by absence of serrated area on copulatory bulb but Males differ from those of PS longer than PI on dorsal view (Fig. 156 B).

MALE (ZMB 2107): Total length 11.37; Carapace, long 6.62; wide 6.5. Carapace anterior part tapering, subquadrate.Anterior eye row slightly procurved, posterior row recurved (Fig. 154 B). Without bristles between AME-clypeus. Sternum with eight sigilla strongly fused medially (Fig. 154 C). Rastellum protuberant, inverted Vshaped, hirsute, without spines apically (Fig. 156 D–E). Chelicerae with denticles along prolateral row of teeth. Prolateral row with megateeth and denticles. Retrolateral row with megateeth and teeth between megateeth. Patella and tibia III with distal crown of well-developed thorns, not interrupted in middle (Fig. 155 A–B). Patellae III and IV with spines on prolaterodorsal face (Fig. 155 A, C). Patella IV with prolaterodorsal short spines along extension of article (Fig. 155 D). Ventral pseudoscopulae occupying 40% of tarsi I and 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 reddish brown and abdomen pale gray (Fig. 154 A). Eyes: Diameters: PME 0.24, PLE 0,32,ALE 0.48, AME 0.44; MOQ: Length 1.24, front width 3.08, back width 2.88; Interdistances: PME–PME 1.72, PLE–PME 0.16, AME–AME 0.2, ALE–AME 0.72, ALE–PLE 0.56, AME–PME 0.6. Ocular area: OAL 7.62, OAW 3.87, and IF 2.05. Body: Clypeus: 0.4; Fovea: 1.64; Labium: long 1.7; wide 1.5; Chelicerae: long 3.2; wide 2; Sternum: long 4.2; wide 4. Abdomen: long 4.87; wide 4.37. Leg measurements: I: Fe 5.75/ Pa 2.75/ Ti 3.25/ Me 4/ Ta 2.25/ total 18. II: 5.62/ 2.5/ 3.12/ 4.37/ 2.5/ 18.12. III: 5/ 2.87/ 2.5/ 4.75/ 2.87/ 18. IV: 5.62/ 2.5/ 5.12/ 5.62/ 2.87/ 21.75. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0, r0; Me v0- 0-3, d0, p0, r0; ta v0, d0, p0-3-3, r0-1-3. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0, r1-1-1; Me v0-2-0, d0, p0-0-3, r0-0-2; ta v0, d0, p0-2-3, r0-2-3. III—Fe v0, d0, p0, r0; Pa v0, d8-12-19, p1-3-3, r0-0-2; ti v1-0-3, d0- 1-11, p1-1-4, r0-1-3; Me v1-1-2, d0, p2-3-3, r0-1-5; ta v0, d0, p1-3-3, r0-2-0; IV—Fe v0, d0, p0, r0; Pa v0, d20-9-3, p2-2-0, r0; ti v0-1-3, d0, p0, r0; Me v3-4-3, d0, p0-3-4, r0- 0-2; ta v0, d0, p0-5-6, r0-1-0. Palp: PA poorly developed, embolus with three keels (PAc, PI and PS). BTA poorly developed in both prolateral and dorsal view; prolateral tegulum without serrated area; embolar bases thinner than basal (Fig. 156 A–C).

Note. The holotype is in a poor condition; hindering the mobility of the chelicerae, which prevented the examination of the cheliceral teeth.

VARIATION

MALES (n=10): Eyes: Diameters: PME 0.2–0.24, PLE 0.32, ALE 0.48–0.52, AME 0.4–0.44; MOQ: Length 1.2–1.24, front width 3.08–3.6, back width 2.88–3.2; Interdistances: PME–PME 1.72 – 1.96, PLE–PME 0.16– 0.2, AME–AME 0.2–0.4, ALE–AME 0.72–1.08, ALE–PLE 0.56, AME–PME 0.6–0.64. Ocular area: OAL 5.5– 7.62, OAW 3.87–4.25, and IF 2.05–3. Body: Total length: 11.37–12.5; Carapace: long 6.62–7.25; wide 6.5–6.87; Clypeus: 0.37–0.4; Fovea: 1.64–2.8; Labium: long 1.7; wide 1.5; Chelicerae: long 3.2–3.6; wide 2–2.4; Sternum: long 4.2–5; wide 4–4.3. Abdomen: long 4.87–5.25; wide 4.37–4.87. Leg measurements: I: Fe 5.75–6.25/ Pa 2.75/ Ti 3.25–3.5/ Me 4–4.37/ Ta 2.25–2.87/ total 18–19.75. II: 5.62–6/ 2.5–2.87/ 3.12–3.5/ 4.37–4.62/ 2.5–2.75/ 18.12– 19.75. III: 5–5.25/ 2.87–3.5/ 2.5–2.87/ 4.75–5/ 2.87–3.37/ 18–20. IV: 5.62–6.75/ 2.5–3.37/ 5.12–5.37/ 5.62–6.12/ 2.87/ 21.75–25.21. Formula 4123 .

Distribution. ARGENTINA. Corrientes: San Cosme; URUGUAY. Montevideo, Canelones (Map 8).

Material examined. ARGENTINA: Corrientes, San Cosme, [27º 31’ 00”S 58º 34’ 00”W] 1♂, C. I. Wurth leg. (MACN 19817) .