Amphidraus draconicaudatus Ruiz 2017, sp. nov.

Amphidraus draconicaudatus sp. nov.

Figs 22–24

Types: material. Holotype: ♂ from Centro de Pesquisa Canguçu, 09°58'38.7"S, 50°02'05.0"W, Pium, Tocantins, Brazil, 11–26.V.2016, L.F.B. Serrão et al. leg. (MPEG 32689). Paratypes: 1♂ (IBSP 211843) and 2♀ (IBSP 211844, MPEG 32690), same data as holotype.

Additional material examined. BRAZIL: Tocantins: Pium (Centro de Pesquisa Canguçu, 09°58'38.7"S, 50°02'05.0"W): 6♂, 1♀, 11–26.V.2016, L.F.B. Serrão et al. leg. (MPEG 32757–32763).

Etymology. The epithet is a compound adjective in Latin (draco + cauda) and refers to the shape of the projection of the embolic disc.

Diagnosis. A. draconicaudatus sp. nov. differs from all Amphidraus species in having the RvTA with a tooth with cusps (Figs 24 B–D), the tegular lobe with a rounded retrolateral projection (Fig. 24 C), the vPED distally placed on the disc and dPED rectangular (Figs 23 C, 24C), and by the presence of an elongate and stout projection, with several terminal branches, that emerges from the retrolateral border of the embolic disc and extends towards the tegulum border (Figs 23 A, 23C, 24C, 24D). The females of A. draconicaudatus sp. nov. (Fig. 24 F) are superficially similar to those of A. sie (see Galvis 2017: figs 9C–D) and A. bifidus (Fig. 21 F) in having a compact, pear-shaped mass of ducts and spermathecae. They can be distinguished from those of A. bifidus sp. nov. by not having secondary spermathecae and from those of A. sie by the shorter copulatory ducts, reaching the spermathecae near the coupling pocket (in A. sie, copulatory ducts bend from that point and reach the spermathecae after forming another loop; see Galvis 2017, fig. 24f).

Description. Male holotype (MPEG 32689). Total length: 2.47. Carapace 1.29 long, 0.91 wide and 0.63 high. Ocular quadrangle 0.65 long. Anterior eye row 0.99 wide, posterior 0.87 wide. Legs: 3412. Length of leg I 1.89 (0.61 + 0.63 + 0.65); II 1.83 (0.59 + 0.63 + 0.61); III 2.36 (0.84 + 0.87 + 0.65); IV 2.32 (0.72 + 0.76 + 0.84). Palp (Figs 23 A–E, 24A–D): cymbium with large cymbial conductor (Fig. 24 C); RTA reduced; embolic filament longer than straight, sclerotized portion (Fig. 24 C). Color in alcohol: thoracic area brown and cephalic area black; abdomen dorsally brown and variegated; ventrally pale; legs brown (Figs 22 A, 22B).

Female paratype (MPEG 32690). Total length 2.92. Carapace 1.40 long, 0.96 wide and 0.88 high. Ocular quadrangle 0.60 long. Anterior eye row 1.00 wide, posterior 0.88 wide. Legs: 3412; Length of leg I 2.06 (0.60 + 0.78 + 0.68); II 2.02 (0.66 + 0.72 + 0.64); III 2.56 (0.80 + 0.84 + 0.92); IV 2.48 (0.76 + 0.76 + 0.96). Epigyne (Figs 24 E–F): coupling pocket narrow, dorsally placed on posterior border of epigynal plate; gland present near copulatory openings; primary spermatheca with evident glands (Figs 24 E, 24F). Color in alcohol: thoracic area dark brown with light brown area in middle portion, cephalic area black; abdomen dorsally brown and variegated; ventrally pale; legs light brown (Figs 22 C, 22D).

Distribution. Known only from the type locality (Brazil, Tocantins) (Fig. 31).