Actinopus pindapoy sp. nov. Figs 157–159, Map 8 Type material. Holotype male from Provincia Bonaerensis, Chacabuco, Zárate, Buenos Aires, Argentina (MACN-Ar 19824). Etymology. The specific name is a noun in apposition from the type locality name. Diagnosis. Themaleof Actinopuspindapoy resembles those of A. itacolomi (Fig. 153 A–C), A. longipalpis (Fig. 156 A–C), A. tutu (Fig. 143 A–C), A. argenteus (Ríos-Tamayo & Goloboff, 2018, fig. 10 G–I), A. pampa (Ríos-Tamayo & Goloboff, 2018, fig. 27 G–I) and A. azaghal (Fig. 148 A–C) by the presence of three keels in prolateral view of embolus, small total length, and inconspicuous patterns of coloration on legs and palp, when present. It resembles A. longipalpis, A. argenteus and A. pampa by absence of serrated area below PAc. They resemble those of A. azaghal, A. pampa and A. longipalpis by BTA dorsally inserted. It also resembles A. azaghal, A. pampa and A. tutu by PA continuous to PI. It differs from those of all these species by the very inconspicuous and delicate PAc. It further differs from A. pampa by absence of depression at embolus base and from A. argenteus by BTA inserted at the middle of prolateral view. MALE (MACN-Ar 19824): Total length 13.87; Carapace, long 6.37; wide 6.62. Carapace rounded. Anterior eye row slightly procurved, posterior row recurved (Fig. 157 B). With few short and weak bristles between AME-clypeus, between ALE–ALP, between posterior eyes-fovea and lateral eyes-edge of carapace. Sternum with eight sigilla fused medially, two distal sigilla more fused than others (Fig. 157 C). Rastellum protuberant, inverted V-shaped, with some short bristles, without spines apically (Fig. 157 E–F). Chelicerae with ten denticles along prolateral row of teeth. Prolateral row with five megateeth and two basal teeth. Retrolateral row with six megateeth and six denticles between the two basal megateeth (Fig. 157 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. 158 A–B). Patellae III and IV with spines on prolaterodorsal face (Fig. 158 A, C). Tibia IV without spines on dorsal surface (Fig. 158 D). Ventral pseudoscopulae occupying 40% 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 reddish brown; tibia of palp orangish brown, paler than other articles; Abdomen bluish pale gray, with many unpigmented spots (Fig. 157 A). Eyes: Diameters: PME 0.2, PLE 0.48, ALE 0.6, AME 0.32; MOQ: Length 1.32, front width 3.48, back width 3; Interdistances: PME–PME 1.88, PLE–PME 0.16, AME–AME 0.2, ALE–AME 1.04, ALE–PLE 0.64, AME–PME 0.68. Ocular area: OAL 5.12, OAW 4, and IF 3.25. Body: Clypeus: 0.37; Fovea: 2.62; Labium: long 1.5; wide 1.37; Chelicerae: long 3.37; wide 1.62; Sternum: long 5.12; wide 3.87. Abdomen: long 7.5; wide 5.62. Leg measurements: I: Fe 6.25/ Pa 2.62/ Ti 3.37/ Me 4.37/ Ta 2.5/ total 19.12. II: 5.62/ 2.87/ 2.62/ 4.25/ 2.5/ 17.87. III: 5/ 3.12/ 2.87/ 5/ 2.87/ 18.87. IV: 6.75/ 3.37/ 5.5/ 5.62/ 3.25/ 24.5. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0, r0; Me v1-2-2, d0, p1-0-3, r0; ta v0-2-0, d0, p0-2-2, r0. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v2-2- 0, d0, p0, r0-4-4; Me v0-3-3, d0, p0-0-2, r0-2-5; ta v0-2-2, d0, p0-1-3, r0-1-3. III—Fe v0, d0, p0, r0; Pa v0, d5-7-30, p0-0-2, r0-0-1; ti v0, d1-0-16, p0-0-4, r1-0-3; Me v0-0-2, d2-0-1, p2-2-1, r0-1-6; ta v0, d0, p0, r0-0-4; IV—Fe v0, d0, p0, r0; Pa v0, d17-16-6, p0, r0; ti v0-1-3, d0, p1-0-3, r0; Me v3-3-4, d0-0-1, p2-3-4, r0-0-1; ta v0, d0, p3-5-4, r0. Palp: PA well developed. Embolus with three keels (PAc, PI and PS). BTA developed, dorsally displaced; Prolateral tegulum without cusps; PA continuous to PI; Embolar base thin (Fig. 159 A–C). Distribution. ARGENTINA. Misiones: Pindapoy (Map 8). Examined material. ARGENTINA: Misiones: Pindapoy, [27º 35’ 22.22” S 55º 50’ 00.04” W], 2♂, 16.i.1942, P. Williner leg. (MACN-Ar 19824).

Published as part of Miglio, Laura Tavares, Pérez-Miles, Fernando & Bonaldo, Alexandre B., 2020, Taxonomic Revision of the Spider Genus Actinopus Perty, 1833 (Araneae, Mygalomorphae, Actinopodidae), pp. 1-256 in Megataxa 2 (1) on pages 174-176, DOI: 10.11646/megataxa.2.1.1, http://zenodo.org/record/5597237