Mazax ramirezi Rubio & Danisman 2014

Mazax ramirezi Rubio & Danişman, 2014 Figs 12–13 Mazax ramirezi Rubio & Danişman, 2014: 1185, figs 1a–f, 2a–d, 3a–f, 4a–g, 5a–f. Diagnosis Males of M. ramirezi resemble those of M. acanthaspis comb. nov. by having the carapace with a thoracic groove and feathery hairs, but differ by the tibia I ventral spination being 4-4 (5- 4 in M. acanthaspis) and by the absence of a dorsal projection on the embolus (Fig. 13G–H) (present in M. acanthaspis). Females resemble those of M. acanthaspis by the lung-shaped ST II, but differ by having a tibia I ventral spination of 5-4 (Fig. 12D) (5- 5 in M. acanthaspis), ST II with the proximal region wider than the distal region (Fig. 12H) (distal region of the same width as the proximal in M. acanthaspis), and by having a twisted CD (Fig. 12H) (nearly straight in M. acanthaspis). Type material Holotype ARGENTINA • ♀; Buenos Aires Province, Campana, Reserva Natural Otamendi; [34°13.649′ S, 58°53.916′ W]; elev. 22 m; 27 Dec. 1997; B. Fuentes and O. Di Iorio leg.; MACN-Ar 30732 (examined). Paratypes ARGENTINA • 1 ♂; same locality as for holotype; 10 Jan. 1998; MACN-Ar 30733 (examined) • 2 ♀♀; same locality as for holotype; 9 Jan. 1998; B. Fuentes leg.; MACN-Ar 30734 • 1 ♀; same locality as for holotype; 30 Dec. 1997; B. Fuentes and O. Di Iorio leg.; MACN-Ar 30735 (examined) • 1 ♀; same locality as for holotype; 1997; O. Di Iorio leg.; MACN-Ar 16720 • 1 ♀; same locality as for holotype; 21 Feb. 1998; B. Fuentes leg.; MACN-Ar 30736 (examined). Description See Rubio & Danişman (2014: 1185). Remarks Rubio & Danişman (2014) described both males and females as having a 4-4 tibia I ventral spination, reporting no significant variation. However, upon examining the female holotype as well as the paratypes, only the male (MACN-Ar 30733) has 4-4 spines on the ventral surface of tibia I (Fig. 13J); the holotype (MACN-Ar 30732) has 5-4 (Fig. 12D). The other two female paratypes (MACN-Ar-30735 and MACN-Ar-30736) examined have 5-5 ventral spines on tibia I (Fig. 12E–F), Therefore, both M. ramirezi and M. spinosa display intraspecific variation regarding the tibia I spination. Additionally, it is possible to notice the atypical castianeirine RTA in this species (Fig. 13G). Distribution Known only from the type locality (Fig. 20).