Guriurius nancyae Marta, Bustamante, Ruiz & Rodrigues 2022, sp. nov.

Guriurius nancyae Marta, Bustamante, Ruiz & Rodrigues, sp. nov.

urn:lsid:zoobank.org:act: 19B450A1-2031-4D86-A91A-35C5A4CAB5A9

Figs 25–34, 77–78

Type material. Holotype. 1 ♂ (MCTP 30545), BRAZIL: Rio Grande do Sul, Augusto Pestana [28°31’25.9”S 53°59’25.2”W], 07.VI.2009, L.V. Silveira leg. Paratype. 1 ♂ (MCTP 35879), BRAZIL: Rio Grande do Sul, São Francisco de Paula [28°57’00.5”S 50°39’14.1”W], 24–26.IV.2006, A.A. Lise leg.

Etymology. The name honors the Brazilian arachnologist Nancy Lo-Man-Hung, who encouraged the first author to study spiders and contributed in academics by her persistence at fighting for woman rights in the Support Woman in Arachnology (SWA) group.

Diagnosis. Males of Guriurius nancyae can be recognized by the rounded lower edge of the RvTA (Figs 25 – 26, 31 ) and the hooked-shaped RvTA, curved upwards (anterior portion of tegulum), with a rounded distal axis (Figs 25 – 26, 31, 34). Males of G. nancyae resemble those of G. minuano by the circular-shape of the tegulum, but differ by the angulation axis more oblique (Figs 5, 31).

Description. Male (Holotype MCTP 30545). Length: 3.30. Carapace length: 1.74 width, 1.53 height: 0.81. Cephalic region length: 1.56. Thoracic region length: 0.26. Ocular area length: 1.02; Anterior eyes row: 1.09 wide; Posterior eyes row: 1.17 wide; Distances ALE–PME: 0.13; PME–PLE: 0.26; Ocular diameter AME: 0.42; ALE: 0.18; PME: 0.06; PLE: 0.12. Clypeus height: 0.08. Chelicerae, paturon length: 0.46; 0.23 wide; Fang: 0.23 length. Endites length: 0.35; 0.31 wide. Labium length: 0.10; 0.21 wide. Sternum length: 0.65; 0.46 wide. Abdomen length: 1.58; 1.06 wide; height: 0.74. Legs: femur length I: 0.85; II: 0.68; III: 0.68; IV: 1.02; patella I: 0.68; II: 0.51; III: 0.40; IV: 0.51; tibia I: 1.02; II: 0.68; III: 0.51; IV: 0.68; metatarsus I: 0.68; II: 0.44; III: 0.51; IV: 0.68; tarsus I: 0.34; II: 0.34; III: 0.34; IV: 0.51. Formula legs: 1423. Palp, femur length: 0.46, patella: 0.21, tibia: 0.10, cymbium: 0.46. Palp macrosetae, femur d1. Legs macrosetae, femur I: d1-1-1, p1di; II: d1-1-1, p1di, r1di; III: d0-1-1, p0-0-2, r1di; IV: d1-1-1, p0-0-2, r1di, patella I–II: p0-1-0; III–IV: 0, tibia I: p1di, r0-1-1, v0; II: p1di, r0-1-1, v0; III: p0-1-1, r1di, v1di; IV: p1-1-1, r0-1-1, v2di, metatarsus I: d2di, p2di, r2di, v2di; II: v0-2-2; III: v2di, r2di, p2di; IV: v2di, r0-1-2, p0-1-2. Carapace as described for the genus (Figs 27, 29, 30). Eyes as described for genus. Clypeus dark (Fig. 30), with white scales. Chelicerae as in genus. Endites brown with apex lighter, anterior margin slightly more robust, without protruding external angles (Fig. 28). Labium dark, wider than long and lighter at apex (Fig. 28). Sternum brown, apex slightly narrower than the base of the labium, brown, longer than wide and inverted pentagonal shape (Fig. 28). Legs coloration as described for the genus. Male palp: femur yellow. Tibia with RTA without lobes, large base and sinuous tip (in lateral view), sclerotinized, conspicuous, half the size of the tegulum (Figs 26, 34). RvTA inserted ventrally, below the tegulum, with retrolateral inclination, with a few scales on the dorsum, hooked-shaped, rounded axis, curved distal part of the tegulum (Figs 25 – 26, 31, 33 – 34). Cymbium suboval, with a rounded apex with a tuft of yellow setae, a lighter distal region, and brown proximal region (Fig. 32). Tegulum circular, inclined obliquely in relation to the apex of the cymbium (Fig. 31). Embolus slender, ribbon-like, embolar base dorsoprolateral (07:00 o’clock), embolar path around the tegulum (150º) (Figs 31, 33). Abdomen and spinnerets: as described for the genus.

Female. Unknown.

Distribution. Brazil [Rio Grande do Sul] (Figs 77 – 78).

Natural history. Occurrence around 390–876 m a. s. l. and the type locality is placed in Atlantic Forest biome.