Acanthoctenus spinipes Keyserling, 1877 Figs 10B, 15–18 Acanthoctenus spinipes Keyserling, 1877: 695, plate 8, fig. 61 (female holotype from Colombia, Santa Fé de Bogota, [4º35’39.5”N, 74º01’56.9”W] deposited in NHM, examined).—F.O. Pickard-Cambridge 1897: 103, plate 4, fig. 3d.— Polotow & Brescovit 2008: 706.— World Spider Catalog 2020. Other material examined. COLOMBIA. Cundinamarca: Fusagasugá (Río Cuja) [4º17’30.3”N, 74º25’02.4”W], 1 female, C. Hernández coll. (ICN-Ar73); Anolaima [4º45’42.2”N, 74º27’50.4”W], 1 male, 1 immature, G. Botero coll. (ICN-Ar4667). Diagnosis. Males of Acanthoctenus spinipes (Figs 15 D–E, 16A–B) resemble those of A. lamarrei sp. nov. (Figs 42 D–E, 43A–B) by the median apophysis massive, the apex at least five times wider than the base, and RTA elongated, longer than wide. It can be distinguished by the embolus elongated, the base slightly swollen and starting at 9 o’clock and the apex ending at 2 o’clock, and RTA distally straight and round. A. lamarrei sp. nov. presents a shorter embolus, the apex ending at 12 o’clock, the base swollen at least four times the apex width, and RTA distally curved. Females of Acanthoctenus spinipes (Figs 16 C–D, 17C, 18A–B) resemble those of A. chickeringi sp. nov. (Figs 39 C–D, 40D, 41A–B) by the atrium massive, subquadrangular, as wide as long. It can be distinguished by the anterior and lateral borders of the atrium strongly sclerotized, the median sector not extending into the atrium, and the copulatory ducts S-shaped, not bended apically. A. chickeringi sp. nov. presents slightly sclerotized lateral borders on the atrium, an extension of the median sector into the atrium, and apically bended copulatory ducts. Description. Male (ICN-Ar4667). Total length 14.73. Carapace 6.75 long and 5.50 wide. Clypeus 0.30 high. Eye diameters: AME 0.38, ALE 0.24, PME 0.39, PLE 0.44. Leg measurements: I: femur 8.80/ patella 3.28/ tibia 9.28/ metatarsus 8.37/ tarsus 2.42/ total 32.15; II: 7.71/ 2.84/ 7.46/ 7.22/ 2.18/ 27.11; III: 6.11/ 2.38/ 5.34/ 6.33/ 2.09/ 22.25; IV: 7.62/ 2.64/ 7.24/ 9.27/ 2.65/ 29.42. Leg formula 1423. Leg spination: tibia I and II v-2-2-2-2-2-2-2-2-2, r-1-1-0-1-1-1, p-1-0-1-1, III and IV v-2-2-2, r-1-0-1-1, p-0-1-1; metatarsus I and II v-2-2-2-2-2, r-1-0-1-1, p-1-1-0- 1; III and IV v-2-2-2, r-1-1-1, p-1-1-0-1. Palp (Figs 15 D–E, 16A–B): tibia shorter than cymbium, slightly curved; RTA with round tip; cymbium elongated and with retrobasal projection; embolus elongated, cylindrical, and bent; conductor hyaline and following the tip of embolus; median apophysis laminar, spatula-shaped, narrow at the base and wider at the apex, with an apical hook. Female (holotype NHM). Total length 11.00. Carapace 5.10 long and 3.90 wide. Clypeus 0.14 high. Eye diameters: AME 0.20, ALE 0.14, PME 0.28, PLE 0.23. Leg measurements: I: femur 3.20/ patella 1.60/ tibia 2.90/ metatarsus 2.30/ tarsus 1.00/ total 11.00; II: 3.00/ 1.50/ 2.40/ 2.20/ 1.00/ 10.10; III: 2.60/ 1.20/ 2.10/ 2.40/ 1.10/ 9.40; IV: 3.50/ 1.40/ 3.20/ 4.00/ 1.40/ 13.50. Leg formula 4123. Leg spination: tibia I and II v-2-2-2-2-2, r1-1-0, p-0-1-0, III and IV v-2-2-2, r-1-1, p-1-1; metatarsus I, II and III v-2-2-2, r-1-1-1, p-1-1-1, IV v1-1-1-1-1-2, r1-1-1, p1-1-1. Epigynum (Figs 16 C–D, 17C, 18A–B): median sector subpentagonal, wide anteriorly, not extending into the atrium and projected posteriorly; anterior border of the lateral sectors straight forming approximately a 70° angle with the median sector longitudinal axis; subquadrangular atrium; copulatory ducts curved, S-shaped; spermathecae head quote-shaped, with apical glandular openings, spermathecae base curled; fertilization ducts tubular, slanting outwards. Variation. Two females: total body length 10.50–16.20; carapace length 4.92–6.20. Distribution. Central Colombia (Fig. 10B).

Published as part of Arizala, Stephany, Labarque, Facundo Martín & Polotow, Daniele, 2021, Revision of the Neotropical spider genus Acanthoctenus (Araneae: Ctenidae Acanthocteninae), pp. 1-55 in Zootaxa 4920 (1) on pages 17-21, DOI: 10.11646/zootaxa.4920.1.1, http://zenodo.org/record/4471454