Amphidraus mysticetus Ruiz 2017, sp. nov.
Creators: name: Ruiz, Gustavo R. S.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Salticidae
Amphidraus
Amphidraus mysticetus

description: Amphidraus mysticetus sp. nov.
Figs 1–4
Type material. Holotype: ♂ from Centro de Treinamento em Manejo Floresta Roberto Bauch, Instituto Floresta Tropical [03°27’S, 48°35’W], Paragominas, Pará, Brazil, 2015, G.R.S. Ruiz leg. (MPEG 32684). Paratypes: 1♂ from Mocambo [01°26'13.3"S, 48°25'14.9"W], Belém, Pará, Brazil, 10.VII.2003, J.A.P. Barreiros & D.R. Santos leg. (IBSP 211841); 1♀ from Tailândia, 02°36’04.2”S, 48°44’53.1”W, Pará, Brazil, 18.VI.2016, G.R.S. Ruiz leg. (MPEG 32692).
Etymology. The species epithet, to be treated as a Latin noun in apposition, refers to the conformation of the RTA and RvTA bearing thick setae, resembling an open mouthed whale with the baleen plates hanging from the upper maxilla (RvTA).
Diagnosis. The embolic disc (with long dPED of rounded tip, prolaterally projected and short vPED ventrally projected; Fig. 4 C, 6C) and pattern of scales on the carapace of A. mysticetus sp. nov. (Figs 1 A, 2A, 2C) are similar to those of A. caxiuanan sp. nov. (Fig. 5 A). However, A. mysticetus sp. nov. differs from this species in having the RvTA with a triangular tip (Fig. 4 D), the RTA with the tip prolaterally curved over the cymbium (Fig. 4 B), and by the presence of enlarged, distal retrolateral setae on the tibia (Figs 3 C, 3D, 4D), while A. caxiuanan sp. nov. has a rounded RvTA (Fig. 6 D), erect RTA (Fig. 6 B) and no enlarged setae. The female of A. mysticetus differs from those of the remaining species of the genus in having the copulatory openings close to the border of the epigyne (Figs 4 E–F).
Description. Male holotype (MPEG 32684). Total length: 2.17. Carapace with a longitudinal stripe of white scales on cephalic region and tufts of brown scales laterally (Figs 1 A, 2A, 2C), 1.22 long, 0.84 wide and 0.55 high. Ocular quadrangle 0.67 long. Anterior eye row 0.87 wide, posterior 0.76 wide. Legs 4312. Length of leg: I 1.81 (0.57 + 0.67 + 0.57); II 1.73 (0.55 + 0.61 + 0.57); III 2.09 (0.65 + 0.68 + 0.76); IV 2.28 (0.65 + 0.76 + 0.87). Palp (Figs 3 A–D, 4A–D): embolic filament short, about one third the length of the straight, sclerotized portion (Fig. 3 B, 4C). Color in alcohol: thoracic area brown and cephalic area black; abdomen dorsally brown and variegated; ventrally pale; legs light brown (Figs 2 A, 2B).
Female paratype (MPEG 32692). Total length: 2.51. Carapace with scale pattern as in male (Figs 2 C, 2D), 1.48 long, 0.87 wide and 0.57 high. Ocular quadrangle 0.57 long. Anterior eye row 0.91 wide, posterior 0.80 wide. Legs: 4312; Length of leg I 1.98 (0.65 + 0.76 + 0.57); II 1.85 (0.61 + 0.67 + 0.57); III 2.20 (0.68 + 0.72 + 0.80); IV 2.47 (0.68 + 0.84 + 0.95). Epigyne (Figs 4 E, 4F) with glands in the copulatory ducts near the copulatory openings. Color in alcohol as in male (Figs 2 C, 2D).
Distribution. Known only from the type locality (Brazil, Pará) (Fig. 32).
description: Published as part of Ruiz, Gustavo R. S., 2017, Ten new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini) and three new combinations, pp. 401-437 in Zootaxa 4312 (3) on pages 404-408, DOI: 10.11646/zootaxa.4312.3.1, http://zenodo.org/record/855427