Figs 18–19, 24–25, 26
Type material. Holotype: male from PPBio plot, Igarapé Caquajó, Floresta Nacional de Caxiuanã, Portel, Pará, Brazil (1.96055556°S 51.61255556°W), 12.V.2005, C.A. Lopes leg. (MPEG 34243).
Additional material examined. BRAZIL, Pará: Rio Xingu, Vitoria do Xingu (2.70861111°S 52.09111111°W), 03–12.IX.2000, C. Maciel leg. (MPEG 34244).
Etymology. The epithet, a noun in apposition, refers to the developed RvTA of the male palp.
Diagnosis. This species seems to be closely related to Mago opiparis Simon, 1900 and Mago steindachneri (Taczanowski, 1878), with whom it shares a spade-shaped RTA. The male of M. apophysis sp. nov. differs from those two species by having a large RvTA placed proximally at the tibia (Figs 24–25) (RvTA near the RTA in M. opiparis and poorly developed in M. steindachneri; see Galiano 1963: pl. 26, fig. 13; pl. 27, fig. 5).
Description. Male (holotype). Total length: 5.35. Carapace orange, cephalic area darker, with a few white scales around fovea (Fig. 18); 2.71 long, 1.95 wide, 1.76 high. Length of ocular quadrangle: 1.76; anterior eye row 1.96 wide, posterior 1.87 wide. A central tuft of white scales above AME and a pair of tufts of white scales connecting anterior and posterior eyes (Fig. 18). No eyebrow or clypeal tuft. Chelicera orange, with poorly developed mastidion at same location as in Mago jurutiensis Patello & Ruiz, 2014 (see Patello & Ruiz 2014: figs 6, 17–18); two promarginal and six subpromarginal teeth, the most apical promarginal overlapping the most basal subpromarginal, and one retrolateral plurident with five cusps; no modification on fang. Palp yellow; RTA with acute dorsal tip (Fig. 25); rounded tegulum and thin embolus (Fig. 24); subtegulum projected from beneath tegulum to retrolateral border of bulb (Fig. 25). Sternum yellow. Leg I brown, II–IV yellow. Leg formula: 3412. Length of femur I: 1.61; II: 1.36; III: 2.05; IV: 1.84; patella + tibia I: 2.09; II: 1.62; III: 1.79; IV: 1.60; metatarsus + tarsus I: 1.36; II: 1.37; III: 1.80; IV: 2.08. Abdomen poorly preserved; pale with two dorsal longitudinal interrupted brown lines (Fig. 18); ventrally pale, darker in the middle (Fig. 19). Anterior and median spinnerets pale; posterior brown. Female. Unknown.
Distribution. Known only from upper central state of Pará, Brazil (Fig. 26).