Mago furcatus, Ruiz, 2017

Ruiz, Gustavo R. S., 2017, On four new species of the jumping spider genus Mago O. Pickard-Cambridge, 1882 from South America (Araneae: Salticidae), Zootaxa 4329 (6), pp. 584-593 : 585

Mago furcatus sp. nov.

Figs 1–2 , 5–6 , 9–11 , 26

Type material. Holotype: male from Río Bigal Reserve , Orellana, Ecuador (0.525– 0.527°S 77.418°W), 910–970 m elev., 01–05.XI.2010, W. & D. Maddison, M. Veja & M. Reyes leg. (UBC-SEM).

Etymology. The epithet, an adjective, refers to the shape of the embolic base, which has an additional prolateral apophysis , becoming forked.

Diagnosis. This species seems to be closely related to Mago mimicus sp. nov. In fact, their bodies are near identical (compare Figs 1–8 ). Also, both species have developed, acute RvTA pointing ventro-retrolaterally ( Figs 10–13 ), not seen in any other species of the genus, and a subrectangular RTA. The male of M. furcatus can be distinguished from that of M. mimicus by the uncommon acute apophysis on prolateral side of embolic base ( Figs 9–10 ), absent in M. mimicus .

Description. Male (holotype). Total length: 5.55. Carapace reddish dark brown with lighter area behind fovea ( Fig. 5 ) holding a tuft of white scales ( Fig. 1 ); 3.01 long, 2.08 wide, 1.71 high. Length of ocular quadrangle: 1.38; anterior eye row 1.94 wide, posterior 1.86 wide. No eyebrow or clypeal tuft ( Fig. 2 ). Chelicera dark brown ( Figs 2 , 6 ), with no mastidion, but with keel along frontal border; two promarginal teeth, a line of about three subpromarginal minute teeth not overlapping prolateral teeth, and five separate retrolateral teeth; fang unmodified. Palp dark brown ( Figs 2 , 6 ); RTA and RvTA in right angle ( Fig. 11 ); cymbium oval with retrolateral, proximal excavation; tegulum globose with tapering, curved embolus ( Fig. 10 ). Sternum yellow. Leg I dark brown with tuft of white scales prolaterally on patella ( Fig. 2 ) (apparently prolaterally also on mid tibia and mid metatarsus); II–IV with yellow femora and striped (brown/yellow) patellae, tibiae and metatarsi ( Figs 2 , 6 ). Leg formula: 4132. Length of femur I: 1.92; II: 1.36; III: 1.52; IV: 1.86; patella + tibia I: 1.89; II: 1.99; III: 2.01; IV: 2.14; metatarsus + tarsus I: 1.62; II: 1.48; III: 1.88; IV: 2.05. Abdomen dorsally brown with a pale longitudinal line of irregular borders ( Fig. 5 ); scattered white scales ( Fig. 1 ); ventrally with a black area surrounded by pale border ( Fig. 6 ). Spinnerets brown. Female. Unknown.

Distribution. Known only from the type locality ( Fig. 26 ).

Figures

FIGURE 26. Collection records of Mago spp described herein: yellow circle: M. furcatus sp. nov.; red circle: M. mimicus sp. nov.; cyan circles: M. apophysis sp. nov.; purple circle: M. pardo sp. nov.

FIGURES 1 – 4. Mago spp, live specimens. M. furcatus sp. nov.: 1 male holotype, dorsal view; 2 same, frontal view. M. mimicus sp. nov.: 3 male holotype, dorsal view; 4 same, frontal view. © 2015 W. Maddison, released under a Creative Commons Attribution (CC-BY) 3.0 license.

FIGURES 5 – 8. Mago spp. M. furcatus sp. nov.: 5 male holotype, dorsal view; 6 same, ventral view. M. mimicus sp. nov.: 7 male holotype, dorsal view; 8 same, ventral view.

FIGURES 9 – 13. Mago spp. M. furcatus sp. nov.: 9 left male palp (holotype), prolateral view; 10 same, ventral view; 11 same, retrolateral view. M. mimicus sp. nov.: 12 left male palp (holotype), ventral view; 13 same, retrolateral view. Scale bars: 0.5 mm.