Amphidraus caxiuanan, 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 : 408-410

Amphidraus caxiuanan sp. nov.

Figs 5–6

Type material. Holotype: ♂ from Estação Científica Ferreira Penna [01°42'24"S, 51°27'34.3"W], Floresta Nacional de Caxiuanã, Melgaço, Pará, Brazil, 14.IV.2006, J.A.P. Barreiros leg. ( MPEG 29052 ).

Etymology. Noun in apposition taken from type locality. The final -n is added in order to mimic phonetics of the name of the locality.

Diagnosis. The embolic disc (with long dPED of rounded tip, prolaterally projected and short vPED ventrally projected; Figs 4 C, 6C) and pattern of scales on the carapace of A. caxiuanan sp. nov. ( Fig. 5 A) are similar to those of A. mysticetus sp. nov. ( Figs 1 A, 2A, 2C). However, A. caxiuanan sp. nov. can be distinguished from this species in having RvTA with rounded tip ( Fig. 6 D), and a straight RTA ( Fig. 6 B), while A. mysticetus sp. nov. has triangular RvTA tip ( Fig. 4 D) and the RTA with the tip prolaterally curved over the cymbium ( Fig. 4 B). In addition, it also differs from A. mysticetus sp. nov. by the curved, proximal, dorso-prolateral projection of the cymbium ( Fig. 6 B), and a retrolateral depression on cymbium wherein the RTA fits ( Fig. 6 D).

Description. Male holotype (MPEG 29052). Total length: 2.43. Carapace with a longitudinal stripe of white scales on carapace and tufts of brown scales laterally ( Fig. 5 A), 1.33 long, 0.93 wide and 0.65 high. Ocular quadrangle 0.65 long. Anterior eye row 0.99 wide, posterior 0.84 wide. Legs: unknown (I–II lost). Length of leg III 2.44 (0.80 + 0.80 + 0.84); IV unknown (0.74 + 0.87 + broken). Palp ( Figs 6 A–D): femur with a shallow distal depression, where the proximal tegular lobe fits when the palp is flexed ( Fig. 6 A); embolic filament short, about half the length of the straight, sclerotized portion ( Fig. 6 C). Color in alcohol: thoracic area dark brown and cephalic area black; abdomen dorsally brown and variegated; ventrally pale; legs brown ( Fig. 5 A–B).

Female. Unknown.

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

Figures

FIGURE 1. Amphidraus mysticetus sp. nov. A carapace; B cepHalic area (different types of scales); C wHite scales; D brown scales; E left cHelicera, retrodistal view (unnamed arrows sHow promarginal teetH); F rigHt cHelicera, distal view. ALE, anterior lateral eyes; AME, anterior median eyes; PLE, posterior lateral eyes; PME, posterior median eyes.

FIGURE 4. Amphidraus mysticetus sp. nov. A left male palp, prolateral view; B same, dorsal view; C same, ventral view; D same, retrolateral view; E epigyne, ventral view; F same, cleared, ventral view. CC, cymbial conductor; CO, copulatory opening; dPED, distal process on embolic disc; E, embolus; ED, embolic disc; FD, fertilization duct; PS, primary spermatHeca; RTA, retrolateral tibial apopHysis; RvTA, retroventral tibial apopHysis; SD, sperm duct; TL, tegular lobe; vPED, ventral process on embolic disc.

FIGURE 5. Amphidraus caxiuanan sp. nov. A male Holotype, dorsal view; B same, ventral view.

FIGURE 6. Amphidraus caxiuanan 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; vPED, ventral process on embolic disc.

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.