Acanthogonatus centralis Goloboff, 1995 Figs 5, 10 Acanthogonatus centralis Goloboff, 1995: 96, figs 9, 77, 78, 89 A – F, 90 (♀). Acanthogonatus centralis Ferretti et al., 2010: 21, figs 29, 30 (♂). Acanthogonatus centralis Grismado & Goloboff, 2014: 113, figs 10, 11 (♂). Type material. Holotype. Argentina • 1 ♂; Buenos Aires, Sierra de la Ventana, between Pringles and Saavedra; 26–29 Aug. 1987; P. Goloboff leg.; MACN -Ar 48890, examined. Paratype. Argentina • 1 ♀; same data as holotype; MACN -Ar 48915, examined. Diagnosis. Males of Acanthogonatus centralis can be recognized by the palpal bulb without keels bearing seven subapical prolateral teeth (Fig. 5 A – D), a characteristic that differentiate it from A. monicae sp. nov. in combination with a well-developed tibial apophysis bearing two short and stout spines. Additionally, females differ from A. monicae sp. nov. by having spermathecae with an oval-shaped receptacle bearing a blunt apex and an internal projection shorter than the receptacle itself. They also differ from A. parana by the widened fundus of the spermathecae (Fig. 5 E, F). Description. See Goloboff (1995). Distribution. Restricted to the south-western mountain ranges of Buenos Aires Province, Argentina (Fig. 10).

Published as part of Signorotto, Fiorella & Ferretti, Nelson, 2026, Integrative taxonomy unveils a new lineage within Acanthogonatus centralis Goloboff, 1995 (Araneae, Mygalomorphae, Pycnothelidae): description of Acanthogonatus monicae sp. nov. from central Argentina, pp. 31-46 in Evolutionary Systematics 10 (1) on pages 31-46, DOI: 10.3897/evolsyst.10.172168