Neoxyphinus yekuana Moss & Feitosa, sp. nov.

Figs 4, 17, 139 –167, Map 3

Type material: Holotype: male from 1.5 km E from Caño Tigre, Puerto Ayacucho, Amazonas, Venezuela (5°40'8.73"N, 67°34'3.98"W), primary forest, 12 July 1996, I. Netuzhilin leg. (MACN, PBI _OON 44325). Paratype: one female, 0 7 January 1996, same locality and collector as holotype (MACN, PBI _OON 44326).

Etymology. The specific name is a noun in apposition, honoring an indigenous tribe who inhabits the tropical forests in the states of Bolivar and Amazonas, Venezuela.

Diagnosis. Males resemble those of N. trujillo sp. nov. (Figs 171, 175), N. hispidus (See Abrahim et al. 2012, figs 201, 202) and N. furtivus (See Abrahim et al. 2012, figs 297, 299) by carapace and abdominal dorsal scutum texturized (Figs 139, 141). They differ from those of N. trujillo (Fig. 173) and N. hispidus (See Abrahim et al. 2012, fig. 203) by the absence of denticles on the anterior surface of the dorsal abdominal scutum (Figs 145, 146), and those of N. furtivus (See Abrahim et al. 2012, fig. 297) by the presence of enlarged setal sockets on the posterior surface of carapace (Fig. 144). Females are distinguished from those of the other species of the genus by the clypeus twice as high as the diameter of ALE (Fig. 162).

Description. Male (holotype): total length 1.99. Cephalothorax: carapace orange-brown, ovoid, pars cephalica slightly elevated, posterolateral surface without spikes, elevated portion finely reticulate, sides strongly reticulate (Fig. 144); lateral margin with small denticles; posterior pars with three pairs of small tubercles (Fig. 144); recurved set of setae on posterior surface with ten small tubercles (Fig. 144). Clypeus margin strongly reborded, curved downwards in front view (Fig. 143). Sternum as long as wide, orange-brown, radial furrows conspicuous, with rows of small pits, surface smooth, covered with small round pits (Fig. 142). Chelicerae, endites and labium orange-brown (Fig. 142). Abdomen: book lung covers large, round. Dorsal scutum orange-brown, middle surface and sides reticulate, anterior half without projecting denticles (Figs 146, 150). Epigastric and postepigastric scutum orange-brown. Legs: pale orange. Leg spination: tibia I v4-4 -2; metatarsus I v2-2 -2. Genitalia: sperm pore small. Palp proximal articles, cymbium and bulb pale orange. Embolus rectangular, without prolateral prong (Figs 148, 155), well-developed apical projection (Figs 151–152, 155).

Female (paratype): total length 1.78. Cephalothorax: carapace orange-brown, broadly oval; posterior pars with two pairs of small tubercles (Fig. 161); recurved set of setae on posterior surface with eight small tubercles (Fig. 161). Clypeus very high, curved downwards in front view (Fig. 162). Abdomen: dorsal scutum middle surfaces and sides finely reticulate (Fig. 164). Legs spination: tibia I v4-4 -2; II v4-2 -2; metatarsus I v2-2 -0; II v2-2 -0. Genitalia: atrium wide, genital median element not visible (Figs 17, 166).

Note. In spite of the sexual dimorphism in clypeus, males and females were collected in the same locality (within a few days apart) and details on the morphology of the carapace posterior surface (enlarged setal socket) suggest that these specimens belong to the same species.

Other material examined. VENEZUELA: Amazonas: 1♂, Puerto Ayacucho, 1.5 km E Caño Tigre, 0 7 January 1996, primary forest, I. Netuzhilin leg. (MACN, PBI _OON 44327); 1♂ (MACN, PBI _OON 44311). Distribution. Known from Amazonas, Venezuela.