Nyetnops madre Villarreal & Martinez 2024, sp. nov.

Nyetnops madre Villarreal & Martínez sp. nov.

urn:lsid:zoobank.org:act: F8AC2BFB-9BA7-469C-9EF9-8C6A6D3F727D

Figs 6–8, 11–12

Diagnosis

Males of Nyetnops madre Villarreal & Martínez sp. nov. resemble those of N. lachonta and N. buruti by having a copulatory bulb (tegulum+embolus), more than 2.2 × as long as palpal tibia but differ from those of N. buruti and N. lachonta by having the tegulum basal section of almost the same width as the distal section across the entire length of the bulb (Fig. 7A–B), instead of a distinctly narrower basal section as in N. buruti and the narrowing in the anterior section of the tegulum apical section in N. lachonta; additionally, the males of this species have an embolar subapical dorsal and ventral serrated keel unique in the genus. Females are similar to those of N. guarani by having the posterior plate wide and a triangular distal margin of the receptaculum but can be distinguished by the less sharp dorsal margin of the receptaculum (Fig. 7C–D).

Etymology

The specific epithet is a noun in apposition taken from the type locality Madre de Dios.

Type material

Holotype PERU • ♂; Madre de Dios department, Boca Río Los Amigos, CICRA; 12°34′9″ S, 70°6′0.40″ W; alt. 270 m; 9–13 Jun. 2010; H. Silva leg.; MUSM – ENT 0503213.

Paratypes PERU • 1 ♀; same collection data as for holotype; MUSM – ENT 0503206 • 1 ♂; same collection data as for holotype; MUSM – ENT 0515831 • 2 ♂♂; same collection data as for holotype; MUSM – ENT 0515830 • 1 ♂; same collection data as for holotype; 14 Jun. 2010; M. Vicchez leg.; MUSM – ENT 0503223.

Other material

PERU • 1 ♂; Cusco department, Río Camisea, Pagoreni; 11°42′22.5″ S, 72°54′10.7″ W; alt. 465 m; 7–28 May 1998; S. Cordova leg.; MUSM – ENT 0506898 • 1 ♂; same collection data as for preceding; 7–29 May 1998; S. Cordova et al. leg.; MUSM – ENT 0515832.

Description

Male (holotype, MUSM–ENT 0503213)

COLORATION (Fig. 6A–B, E, G). Carapace orange. Chelicerae, endites, labium, and sternum light orange. Legs light orange. Abdomen: dorsally dark gray, without noticeable pattern (Fig. 6A). Ventrally gray yellowish, darker on epiandric area. Spinnerets beige. Anterior legs without arolium, crista or gladius.

MEASUREMENTS. Total length 3.51; carapace length 1.54; width 1.30; height 0.68. Clypeus height 0.31. Eye diameters and interdistances: PME 0.17; PME–PME 0.39. Chelicerae length 0.47. Sternum length 0.98; width 0.85. Legs: I: 5.21; II: 4.70; III: 4.29; IV: 6.37. Abdomen length 1.95.

GENITALIA. Very elongated copulatory bulb, tegulum basal section slightly swollen and almost as width as apical section, tegulum surface smooth, embolus surface with sparse longitudinal grooves, embolus with dorsal and ventral dentated keel and tip with very long projections, dorsally petal-like and ventrally rooster-like (Figs 7A–B, 8A–F).

Female (paratype, MUSM–ENT 0503206)

COLORATION AND ABDOMINAL PATTERN. As male, but with lighter color tones (Fig. 6C–D, F, H).

MEASUREMENTS. Total length 5.08, carapace length 1.65, width 1.50, height 0.44. Clypeus height 0.33. Eye diameters and interdistances: PME 0.16, PME–PME 0.38. Chelicerae length 0.51. Sternum length 1.16, width 1.05. Legs: I: 6.20; II: 5.76; III: 5.37; IV: 7.55. Abdomen length 3.24.

GENITALIA. External genital area with weakly sclerotized anterior plate, lep and ess, posterior plate narrow (Fig. 7C). Internal genitalia with triangular margin of receptaculum, posterior plate well developed (Fig. 7D).

Variation

Males (n=3): total length: 3.51–3.96; carapace length: 1.49–1.83.

Distribution

Widespread distribution is known from one locality in Madre de Dios and Cusco departments each (Figs 11–12).