Nyetnops naylienae new species

Figures 4–7, 8H, 10B

Types. Male holotype (IBSP 89356) and female paratype (IBSP 249865) from Rio Yuyapichis, Panguana Biological Station (09’37’S 74°56’W), Huanuco, Peru, 24.xii.1983, M. Verhaagh. Male and female paratypes (IBSP 89353) and male paratype (IBSP 89350), same data as holotype.

Additional material examined. PERU: Huanuco, Puerto Inca, Panguana Biological Station (09’37’S 74°56’W), 24.xii.1983, M. Verhaagh, 1♂ (SMNK-AR 12387); 2♀ (SMNK-AR 12388, 12390); 1♂ (SMNK-AR 12387) . Rio Yuyapichis, Panguana Biological Station (09’37’S 74°56’W) 24.xii.1983, M. Verhaagh, 2♂ (IBSP 89355, for SEM); 1♀ (IBSP 89354); 1♂ (IBSP 89351); 1♂ 1♀ (IBSP 89346) .

Etymology. The specific name is a patronymic honoring Naylien Barreda Leyva, the first author’s wife.

Diagnosis. Males of N. naylienae n. sp. resembles those of N. guarani by having a short copulatory bulb (tegulum + embolus), the length just two times or less the palpal tibia length (Figs 1 B–C; 4B–C), but differ by the swollen tegulum apical section (tas), just a little wider than basal section and similar to the palpal tibia width (Figs 4 B–C; 8H) and by the beveled embolus tip with very long rooster crest like projections (Fig. 7 A–F). Females are readily recognized by the concave distal margin of receptaculum (dmr) with two triangular lobes both sides (Figs 4I; 7 G–H; 10B) and the narrower posterior plate (Fig. 10B). Additionally, both males and females present a marked carapace pattern (Fig. 4A, E, G) as in Nyetnops guarani, but lighter in color.

Description. Male (holotype IBSP 89356): Total length 5.6. Carapace 1.8 long, 1.7 wide. Sternum 1.7 long, 1.6 wide. Leg measurements: I: 2.80; II: 2.75; III: 2.30; IV: 3.05. Carapace orange with a pattern (Fig. 4E). Chelicerae, palps and legs orange; coxae and trochanters lighter. Endites, labium and sternum light orange. Abdomen gray, without a remarkable pattern (Fig. 4A). Anal tubercle and spinnerets lighter than abdomen. Anterior legs without arolium, crista or gladius (Figs 5H; 6A). Palp with elongated copulatory bulb and apical section of tegulum swollen (Figs 6 D–F; 8H), tegulum surface mostly smooth, connecting with an elongated embolus with a surface mostly covered with fine and longitudinal grooves (Fig. 7 A–F), embolus tip beveled and slightly sinuous with very long rooster crest like projections (Fig. 7B).

Female (paratype IBSP 89356): Total length 5.7. Carapace 1.8 long, 1.6 wide. Sternum 1.7 long, 1.6 wide. Leg measurements: I: 2.75; II: 2.70; III: 2.25; IV: 3.0. Same color and patterns as in males. Anterior legs without aro- lium, crista or gladius. External genital area with anterior plate weakly sclerotized (Fig. 4H), posterior plate narrow; internal area with a concave distal margin of posterior receptaculum which has two triangular lobes both sides (Figs 7 G–H; 10B).

Distribution. Known only from Huanuco, Peru (Fig. 10C).