Amphidraus complexus, Zhang, Jun-Xia & Maddison, Wayne P., 2012

Zhang, Jun-Xia & Maddison, Wayne P., 2012, New euophryine jumping spiders from Central and South America (Araneae: Salticidae: Euophryinae), Zootaxa 3578, pp. 1-35 : 2-3

publication ID 10.5281/zenodo.209883


persistent identifier

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scientific name

Amphidraus complexus

sp. nov.

Amphidraus complexus sp. nov.

Figs 1–6 View FIGURES 1 – 6

Type material. Holotype: male, ECUADOR: Napo: Estación Biológica Jatun Sacha, 1.067 ° S, 77.617 ° W, elev. 400 m, forest and nearby disturbed areas, 21–24 July 2004, coll. Maddison, Agnarsson, Iturralde, Salazar, WPM#04–055 (UBC-SEM AR00133, QCAZ). Paratypes: 1 female, same data as holotype (UBC-SEM AR00134); 1 female, same data as holotype.

Etymology. Latin adjective complexus (an aggregate of parts, a complex), referring to the elaborate retrolateral tibial apophysis of the male palp.

Diagnosis. Differs from other Amphidraus species in the shape of the retrolateral tibial apophysis and the process on the embolic disc of the male palp ( Figs 3–4 View FIGURES 1 – 6 ), the extremely short copulatory duct, and the large and swollen spermatheca of the vulva ( Fig. 6 View FIGURES 1 – 6 ).

Description. Male (holotype, UBC-SEM AR00133). Carapace length 1.1; abdomen length 1.1. Chelicera: sandy yellow; with two promarginal teeth and one fissident retromarginal tooth of four cusps. Palp ( Figs 3–4 View FIGURES 1 – 6 ): light yellow brown to dark brown. Embolus slender with tip branched, embolic disc with a big process; retrolateral sperm duct loop very narrow. Retrolateral tibial apophysis complex, with a dorsal branch long and pointed at the tip, and a ventral branch wide and short. First pair of legs with three pairs of ventral macrosetae on tibia and two pairs on metatarsus. Measurements of legs: I 1.7, II 1.7, III 2.0, IV 2.1. Color in alcohol ( Fig. 1 View FIGURES 1 – 6 ): carapace sandy yellow, with two gray stripes behind PLEs, eye area dark; dorsal abdomen light yellow, with a pair of dark brown longitudinal markings, posterior end of abdomen dark; anterior part of dorsum of abdomen with a relatively hard area; legs light yellow, with a few dark annuli.

Female (paratype, UBC-SEM AR00134). Carapace length 1.0; abdomen length 1.4. Chelicera: with two promarginal teeth and one retromarginal tooth of four cusps. First tibia with three pairs of ventral macrosetae and first metatarsus with two pairs. Measurements of legs: I 1.4, II 1.3, III 1.6, IV 1.9. Epigynum ( Fig. 5 View FIGURES 1 – 6 ): without window, opening to copulatory duct relatively anterior. Vulva ( Fig. 6 View FIGURES 1 – 6 ): copulatory duct very short; spermatheca almost spherical. Color in alcohol ( Fig. 2 View FIGURES 1 – 6 ): similar to that of male, but markings on dorsum of abdomen more distinct.

Natural history. Specimens were found on tree trunks in lowland forest or at forest edge.


Museo de Zoologia, Pontificia Universidad Catolica del Ecuador