Amphidraus Simon, 1900

Galvis, William, 2017, Nineteen new species of Amphidraus Simon, 1900 (Salticidae: Euophryini) from Colombia, with comments about their conservation, Zootaxa 4286 (1), pp. 1-40: 2-3

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Amphidraus Simon, 1900


Amphidraus Simon, 1900 

Amphidraus Simon, 1900: 60  , type species: Amphidraus auriga Simon, 1900  .

Nebridia Simon, 1902: 373  , type species: Nebridia semicana Simon, 1902  (synonymized by Zhang & Maddison, 2015: 22).

Diagnosis. Males of Amphidraus  can be recognized by their small size, cryptic colorations and markings, male palpal bulb with a developed proximal tegular lobe and RTA large and complex, or simple and finger-like, and ventral disposition of the embolus, with an elbow-shaped base, which is united to an embolic filament. Females, on the other hand, can be recognized by having size and coloration similar to those of males, with a wide and long epigynal plate, with anterior and medial copulatory openings, and rounded to oval spermathecae ( Galiano 1962, 1963; Zhang & Maddison 2015; pers. obs.).

Species groups (new). The genus is herein divided into two groups of species (poorly known species are not included):

Group 1: the semicanus  group: A. bochica  sp. nov., A. chie  sp. nov., A. guaitipan  sp. nov., A. guatavita  sp. nov., A. mae  sp. nov., A. pae  sp. nov., A. quimbaya  sp. nov., A. quinini  sp. nov., A. semicanus ( Simon, 1902)  , A. sie sp. nov., A. sikuani  sp. nov., A. somondoco  sp. nov., A. sotairensis  sp. nov., A. sua sp. nov., A. tanimuca  sp. nov., A. tisquesusa  sp. nov., A. tundama  sp. nov., A. zaque  sp. nov., A. zipa  sp. nov.

Group 2: the auriga  group: A. argentinensis Galiano, 1997  , A. auriga Simon, 1900  , A. colombianus  sp. nov., A. complexus Zhang & Maddison, 2012  , A. duckei Galiano, 1967  , A. santanae Galiano, 1967  .

Species group differentiation. Males of the semicanus  group have a distinctive exposed pear-shaped embolus disc (ED), with an elbow-shaped base of the wide embolus, rounded tegular lobe (TL), and a simple or complex RTA, sometimes with embolar disc spur (EDS) and very long embolic filaments (EF) ( Figs 1a –bView FIGURES 1, 5a –cView FIGURES 5, 6a –bView FIGURES 6, 8a –bView FIGURES 8, 12a –bView FIGURES 12, 15a –bView FIGURES 15; see Galiano 1963: pl. 27, figs 15–18). On the other hand, males of the auriga  group have complex RTA with thinner embolus, or if wide, with a lateral embolic apophysis ( LEA), a partially covered triangular or slender embolic disc, and a mostly conical tegular lobe, and shorter embolic filament ( Figs 3a –dView FIGURES 3; see Galiano 1997: figs 8–11; Zhang & Maddison 2012: figs 3–4). Females of the semicanus  group present anterior copulatory openings, long copulatory ducts, and posterior larger spermathecae ( Figs 2c –dView FIGURES 2, 8c –dView FIGURES 8, 14c –dView FIGURES 14). Females of the auriga  group present medial to posterior copulatory openings, shorter copulatory ducts, with the smaller spermathecae anterior, or at least at the same position as the copulatory openings (see Zhang & Maddison 2012: figs 5–6; Galiano 1997: figs 5–7; Galiano 1976: fig. 1).

Note. It is interesting to point out that the semicanus  group of species is distributed mainly in high-Andean ecosystems, while the auriga  group of species is known mainly from Amazonian lands.


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Amphidraus Simon, 1900

Galvis, William 2017


Zhang 2015: 22
Simon 1902: 373


Simon 1900: 60