Amphidraus loxodontillus, Ruiz, 2017

Ruiz, Gustavo R. S., 2017, Ten new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini) and three new combinations, Zootaxa 4312 (3), pp. 401-437 : 429

Amphidraus loxodontillus sp. nov.

Figs 25–26

Type material. Holotype: ♂ from Igapó Tarumã-Mirim [03°00’49.0”S, 60°10’33.5”W], Manaus, Amazonas, Brazil, 8.X.1987, unknown leg. (deposited in INPA).

Etymology. Epithet to be treated as a compound Latin noun (loxodonta, the African elephant + the alternative suffix -illus to create the diminutive), in allusion of the shape of the embolic disc and embolus, which, seen upside down, create the image of a young elephant with large ear (the disc) and long trunk (the embolus).

Diagnosis. The embolic disc and embolus of A. loxodontillus sp. nov. are similar to those A. semicanus , with a rounded dPED ( Fig. 26 C). However, A. loxodontillus sp. nov. differs from this species in having a small-sized embolus apical filament ( Fig. 26 C), while in A. semicanus it is very long and spiralled (see Galiano 1963: lám. XXVII, figs 15–16). In addition, the male palpal tibia of A. loxodontillus sp. nov. has two apophyses, while it has a single, wide apophysis in A. semicanus ( Fig. 26 D; see Galiano 1963: lám. XXVII, fig. 15).

Description. Male (deposited in INPA). Total length: 2.51. Carapace 1.29 long, 0.84 wide and 0.53 high. Ocular quadrangle 0.65 long. Anterior eye row 0.87 wide, posterior 0.76 wide. Legs: 4312. Length of leg I 1.90 (0.61 + 0.72 + 0.57); II 1.86 (0.65 + 0.68 + 0.53); III 2.11 (0.70 + 0.65 + 0.76); IV 2.47 (0.76 + 0.80 + 0.91). Palp ( Figs 26 A–D): femur with poorly developed distal ventral depression; embolic filament short, slightly longer than half the length of the straight, sclerotized portion. Color in alcohol: thoracic area dark brown and cephalic area black; abdomen dorsally brown and variegated; ventrally dark brown; legs brown ( Figs. 25 A–B).

Female. Unknown.

Distribution. Known only from the type locality ( Brazil, Amazonas) ( Fig. 29 ).

Misplaced species. The type species of Nebridia ( N. semicana Simon, 1902 ) was transferred to Amphidraus by Zhang & Maddison (2015). Consequently, Nebridia was synonymized with Amphidraus . In addition to the type species, Amphidraus currently includes three other species transferred from Nebridia , namely A. manni , A. mendicus and A. parvus , whose morphology did not correspond to that of true Amphidraus and are discussed below.

Figures

FIGURE 25. Amphidraus loxodontillus sp. nov. A male Holotype, dorsal view; B same, ventral view.

FIGURE 26. Amphidraus loxodontillus sp. nov. A left male palp, prolateral view; B same, dorsal view; C same, ventral view; D same, retrolateral view; CC, cymbial conductor; dPED, distal process on embolic disc; E, embolus; ED, embolic disc; RTA, retrolateral tibial apopHysis; RvTA, retroventral tibial apopHysis; SD, sperm duct; TL, tegular lobe.

FIGURE 29. Map of records of A. pulvinus sp. nov., A. caxiuanan sp. nov. and A. loxodontillus sp. nov. For context of tHis map witHin SoutH America, see Fig. 28.