Caayguara atyaia, Rheims, Cristina A., 2010

Rheims, Cristina A., 2010, Caayguara, a new genus of huntsman spiders from the Brazilian Atlantic Forest (Araneae: Sparassidae), Zootaxa 2630, pp. 1-29 : 20-22

publication ID	https://doi.org/ 10.5281/zenodo.198317
DOI	https://doi.org/10.5281/zenodo.6209423
persistent identifier	https://treatment.plazi.org/id/03CF8789-FFB3-071F-FF22-FDA41126E6E7
treatment provided by	Plazi
scientific name	Caayguara atyaia
status	sp. nov.

Treatment

Caayguara atyaia View in CoL sp. nov.

Figs 59–63 View FIGURES 59 – 63 , 80 View FIGURES 71 – 82 , 87 View FIGURE 87

Type material. Holotype: ɞ from Floresta da Cicuta, Volta Redonda [23º31' S; 44º06' W], Rio de Janeiro, Brazil, 11–18 June 2001, Equipe Biota leg. ( IBSP 54012). Paratypes: 5Ƥ, with the same data as holotype ( IBSP 54006; 54009–54010; MZSP 31775); 1ɞ, Fazenda Santa Helena, Pinheiral [22º31' S; 43º59' W], Rio de Janeiro, Brazil, 5–11 November 1999, A.D.Brescovit et al. ( MZSP 31784).

Additional material examined. BRAZIL. Rio de Janeiro: 5ɞ, 7Ƥ, Volta Redonda [23º31' S; 44º06' W], Floresta da Cicuta ( IBSP 54008; 54015–54017; 54021–54022; 54027; 54564).

Etymology. The specific name is taken from the Tupi Indian language that means “spiny” and refers to the small spines on the ventral surface of the RTA in the male palps. Unchangeable.

Diagnosis. The males of Caayguara atyaia sp. nov. resemble those of C. poi sp. nov. by the very slender tip of the embolus bent prolaterally ( Figs 59 View FIGURES 59 – 63 , 64 View FIGURES 64 – 65 ), but can be distinguished from the latter by the RTA with a serrated dorsal projection and small spines ventrally ( Fig. 59 View FIGURES 59 – 63 ; dp). The females resemble those of C. ybytyriguara sp. nov. by the vulva with the lobes of the posterior part of the copulatory duct arranged longitudinally ( Figs 57 View FIGURES 54 – 58 , 62 View FIGURES 59 – 63 ), but can be distinguished from the latter by the smaller number of lobes and shorter fertilization ducts ( Fig. 62 View FIGURES 59 – 63 ).

Description. Male (IBSP 54012): Dorsal shield of prosoma, legs and chelicerae pale orange, mottled with brown spots. Pedipalps pale orange. Sternum pale yellow with slightly darker margins. Labium and endites pale yellow, distally cream colored. Opisthosoma brownish gray. Dorsally mottled with brown and reddish brown spots. Ventrally with slightly darker margins. Total length 6.1. Prosoma: 2.6 long, 2.5 wide. Opisthosoma: 3.4 long, 2.0 wide. Eye diameters: 0.18, 0.18, 0.14, 0.18; interdistances: 0.14, 0.04, 0.24, 0.24, 0.14, 0.14. Leg measurements: I: 17.3 (4.5, 1.5, 5.0, 4.6, 1.7); II: 19.7 (4.9, 1.6, 5.7, 5.5, 2.0); III: 12.4 (3.5, 1.2, 3.3, 3.3, 1.1); IV: 14.0 (4.1, 1.1, 3.7, 3.9, 1.2). Spination follows the generic pattern. Palp ( Fig. 80 View FIGURES 71 – 82 ): RTA with long, serrated dorsal projection and several small ventral spines ( Fig. 59 View FIGURES 59 – 63 ; dp). Basal lobe small and triangular ( Fig. 60 View FIGURES 59 – 63 ), subdistal lobe absent. Embolus with well developed pars pendula and very slender, prolaterally bent tip ( Fig. 59 View FIGURES 59 – 63 ; ppl).

Female (IBSP 54006): Coloration pattern as in male. Total length 6.8. Prosoma: 3.5 long, 3.1 wide. Opisthosoma: 3.2 long, 2.0 wide. Eye diameters: 0.22, 0.20, 0.18, 0.20; interdistances: 0.20, 0.06, 0.32, 0.28, 0.18, 0.12. Leg measurements: I: 14.2 (3.9, 1.7, 3.8, 3.6, 1.2); II: 16.2 (4.7, 1.9, 4.3, 4.0, 1.3); III: 10.9 (3.4, 1.4, 2.6, 2.5, 1.0); IV: 12.3 (3.7, 1.3, 3.0, 3.1, 1.2). Spination follows the generic pattern. Epigynum: epigynal field wider than long; median septum oval; touching part of lateral lobes slightly shorter than median septum ( Fig. 61 View FIGURES 59 – 63 ). Vulva: pp with 6–7 lobes, linearly arranged in a slightly longitudinal position; fd transversal, slightly longer than half pp ( Figs 62–63 View FIGURES 59 – 63 ).

Variation. (Males (n = 7): total length 6.0–7.0; prosoma 2.5–3.1; femur I 4.3–4.9. Females (n = 9): total length 6.3–8.2; prosoma 2.5–3.4; femur I 3.1–3.9.

Distribution. Known from Volta Redonda and Pinheiral in the state of Rio de Janeiro ( Fig. 87 View FIGURE 87 ).