Caayguara atyaia Rheims, 2010, sp. nov.
Creators: name: Rheims, Cristina A.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Sparassidae
Caayguara
Caayguara atyaia

description: Caayguara atyaia sp. nov.
Figs 59–63, 80, 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, 64), but can be distinguished from the latter by the RTA with a serrated dorsal projection and small spines ventrally (Fig. 59; 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, 62), but can be distinguished from the latter by the smaller number of lobes and shorter fertilization ducts (Fig. 62).
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): RTA with long, serrated dorsal projection and several small ventral spines (Fig. 59; dp). Basal lobe small and triangular (Fig. 60), subdistal lobe absent. Embolus with well developed pars pendula and very slender, prolaterally bent tip (Fig. 59; 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). Vulva: pp with 6–7 lobes, linearly arranged in a slightly longitudinal position; fd transversal, slightly longer than half pp (Figs 62–63).
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).
description: Published as part of Rheims, Cristina A., 2010, Caayguara, a new genus of huntsman spiders from the Brazilian Atlantic Forest (Araneae: Sparassidae), pp. 1-29 in Zootaxa 2630 on pages 20-22, DOI: 10.5281/zenodo.198317