Nyetnops alexanderi Villarreal & Martinez 2024, sp. nov.
Creators: name: Villarreal-Blanco, Eduardo
name: Martínez, Leonel
name: Eyes-Escalante, Melisa
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Caponiidae
Nyetnops
Nyetnops alexanderi

description: Nyetnops alexanderi Villarreal & Martínez sp. nov.
urn:lsid:zoobank.org:act: E703307B-DDE5-4EB2-822C-587DF032B938
Figs 3–5, 11–12
Diagnosis
Males of Nyetnops alexanderi Villarreal & Martínez sp. nov. resemble those of N. guarani Platnick & Lise, 2007, N. naylienae and Nyetnops josei Villarreal & Martínez sp. nov. by having a copulatory bulb (tegulum +embolus), less than 2.2 × as long as palpal tibia but differ from those of Nyetnops josei by the absence of a dorsal abdominal pattern of chevron stripes and from those of N. naylienae and N. guarani by the tegulum apical section not swollen in the median region for which the tegulum basal and apical sections have the same width (Figs 4A–B, 5A). Females can be differentiated from those of N. naylienae by having internal genitalia area with a triangular distal margin of the receptaculum instead of concave and from those of N. guarani by the posterior plate narrow and less sharp dorsal margin of receptaculum (Fig. 4C–D).
Etymology
The specific epithet is a patronym in honor to Alexander Sanchez Ruiz for his contributions to the understanding of the spiders from Caponiidae family worldwide.
Type material
Holotype PERU • ♂; 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 0506888.
Paratypes PERU • 1 ♀; same collection data as for holotype; MUSM – ENT 0506887 • 1 ♂; same collection data as for holotype; MUSM – ENT 0506892 • 1 ♂; same collection data as for holotype; MUSM – ENT 0506897 • 4 ♂♂; same collection data as for holotype; MUSM – ENT 0506890 • 2 ♂♂; same collection data as for holotype; MUSM – ENT 0506894 • 2 ♂♂; same collection data as for holotype; MUSM – ENT 0506885 • 1 ♂; same collection data as for holotype; MUSM – ENT 0506889 • 3 ♂♂; same collection data as for holotype; MUSM – ENT 0506895 • 1 ♂, 1 ♀; same collection data as for holotype; MUSM – ENT 0506891 • 1 ♂; same collection data as for holotype; MUSM – ENT 051044 • 2 ♂♂, 1 ♂; Cusco department, Río Camisea, Armihuari; 11°5′ S, 72°46′ W; alt. 560 m; May–Jun. 1997; S. Cordova leg.; MUSM – ENT 0506884.
Other material
PERU • 1 ♂; Madre de Dios department, Boca Río Los Amigos, CICRA; 12°34′9″ S, 70°6′0.40″ W; alt. 270 m; 8–12 Jul. 2010; Silva and M. Viccez leg.; MUSM – ENT 0503472 • 2 ♂♂; Cusco department, Ce Malvinas; Aug. 2013; V. Borda leg.; MUSM – ENT 0515834 • 9 ♂♂; Puno department, Sandia, San Pedro de Putina, Punco, PN Bahuaja-Sonene; 13°20′24.6″ S, 69°29′13.9″ W; alt. 335 m; 18–19 Sep. 2010; E. Razuri and E. Guillermo leg.; MUSM – ENT 0515835.
Description
Male (holotype, MUSM–ENT 0506888)
COLORATION (Fig. 3A–B, E, G). Carapace orange. Chelicerae, endites, labium, and sternum light orange. Legs light orange. Abdomen: dorsally dark gray, without noticeable pattern (Fig. 3A). Ventrally gray yellowish, darker on epiandric area. Spinnerets beige. Anterior legs without arolium, crista or gladius.
MEASUREMENTS. Total length 3.19; carapace length 1.62; width 1.41; height 0.45. Clypeus height 0.34. Eye diameters and interdistances: PME 0.16; PME–PME 0.37. Chelicerae length 0.56. Sternum length 1.06; width 0.98. Legs: I: 5.48; II: 5.25; III: 4.45; IV: 6.39. Abdomen length 1.60.
GENITALIA. Elongated copulatory bulb, tegulum basal section not swollen and almost as width as apical section (Fig. 4A–B), tegulum surface smooth, embolus surface with longitudinal grooves, embolus tapering to tip, with one long dorsal projection and three ventral projections, one of them with several small dentitions (Fig. 5A–H).
Female (paratype, MUSM–ENT 0506887)
COLORATION AND ABDOMINAL PATTERN. As male but with vivid color tones (Fig. 3C–D, F, H).
MEASUREMENTS. Total length 4.11; carapace length 1.70; width 1.47; height 0.59. Clypeus height 0.26. Eye diameters and interdistances: PME 0.18; PME–PME 0.35. Chelicerae length 0.56. Sternum length 1.08; width 0.99. Legs: I: 5.66; II: 5.29; III: 4.73; IV: 6.66. Abdomen length 2.44.
GENITALIA. External genital area with weakly sclerotized anterior plate, sclerotized lep and remarkable ess, posterior plate narrow (Fig. 4C). Internal genitalia with receptaculum with triangular shape (Fig. 4D).
Variation
Males (n=4): total length: 3.00–3.79; carapace length: 1.43–1.67. Females (n=2): total length: 4.11– 4.89; carapace length: 1.66–1.70.
Distribution
Known from several localities in Peru, in the departments of Cusco, Madre de Dios and Puno (Figs 11– 12).
description: Published as part of Villarreal-Blanco, Eduardo, Martínez, Leonel & Eyes-Escalante, Melisa, 2024, Update in the Peruvian Caponiidae: New records and new species of Nyetnops Platnick & Lise, 2007 (Araneae: Caponiidae), pp. 204-224 in European Journal of Taxonomy 932 on pages 210-214, DOI: 10.5852/ejt.2024.932.2523, http://zenodo.org/record/11145103