Actinopus argenteus Ríos-Tamayo & Goloboff, 2018

Actinopus argenteus Ríos-Tamayo & Goloboff, 2018: 26, fig. 10 A–I, 11 A–D, 44 (holotype ♂, [31º 20’ S 65º 27’ W], Reserva Natural Chancaní, Córdoba, Argentina, 15–30.i.2004, M. Izquierdo leg., MACN-Ar 31204; and paratype ♀, same data as the male holotype, iii.1992, P. Goloboff and C. Szumik, MACN-Ar 36576; not examined); World Spider Catalog, 2020.

Diagnosis. Males of Actinopus argenteus share with A. tutu (Fig. 143 A–C), A. azaghal (Fig. 148 A–C) and A. pindapoy (Fig. 159 A–C) the PA continuous to PAc. They differ from A. azaghal, A. longipalpis (Fig. 156 A–C), A. pampa (Ríos-Tamayo & Goloboff, 2018, fig. 27 G–H), and A. pindapoy by BTA inserted dorsally on the tegulum, and from A. tutu¸A. azaghal, A. itacolomi (Fig. 153 A–C) and A. pindapoy by PS reaching less than the width of embolus. Females of A. argenteus share with A. tutu (Fig. 143 D) the similar subquadrate shape of receptacles. Males differ from those of the trilobate receptacles bearing a conspicouous lateral constriction.

Description. See Ríos-Tamayo & Goloboff (2018: 26).

Distribution. ARGENTINA: Santiago del Estero, Córdoba, and Catamarca.