Caayguara itajucamussi, 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 : 17-18

publication ID	https://doi.org/ 10.5281/zenodo.198317
DOI	https://doi.org/10.5281/zenodo.6209418
persistent identifier	https://treatment.plazi.org/id/03CF8789-FFB0-071B-FF22-FBAE1175E182
treatment provided by	Plazi
scientific name	Caayguara itajucamussi
status	sp. nov.

Treatment

Caayguara itajucamussi View in CoL sp. nov.

Figs 49–53 View FIGURES 49 – 53 , 78 View FIGURES 71 – 82 , 86 View FIGURE 86

Type material. Holotype: ɞ from Parque Estadual Ilhabela, Ilhabela [23°55' S; 45°19' W], São Paulo, Brazil, 09–15 October 2001, Equipe Biota leg. ( IBSP 54468). Paratypes: 1ɞ, 2Ƥ, with the same data as holotype ( IBSP 54463; 54466); 2ɞ, 2Ƥ, Parque Estadual Ilha Anchieta [23º32' S; 45º03' W], Ubatuba, São Paulo, Brazil, 23–30 July 2002, Equipe Biota leg. ( IBSP 54561–54562; MZSP 31791–31792).

Additional material examined. BRAZIL. São Paulo: 1Ƥ, Ilhabela [23°55' S; 45°19' W], Parque Estadual Ilhabela ( IBSP 54462); 2ɞ, 1Ƥ, Morro Pacuíba ( MZSP 16927); 2ɞ, 1Ƥ, Ubatuba, Fazenda Angelim [23º24' S; 45º03' W] ( IBSP 52263); 2ɞ, 2Ƥ, Parque Estadual Ilha Anchieta [23º32' S; 45º03' W] ( IBSP 54440; 54442–54443; 54445); 1ɞ, Bertioga [23º45' S; 45º54' W], Condomínio Costa do Sol ( IBSP 57061).

Etymology. The specific name is a noun in apposition, taken from the Tupi Indian language that means “chalice” and refers to the shape of the median septum of the female epigynum.

Diagnosis. The males of Caayguara itajucamussi sp. nov. resemble those of C. ybytyriguara sp. nov. by the general conformation of the male palp, with RTA being simple ( Figs 49–50 View FIGURES 49 – 53 , 54–55 View FIGURES 54 – 58 ) and embolus showing a triangular subdistal projection ( Figs 49 View FIGURES 49 – 53 , 54 View FIGURES 54 – 58 ; sp). They are distinguished from those of the latter species by the presence of a squared tegular projection and by the embolus with a distal grove at the tip ( Fig. 49 View FIGURES 49 – 53 ; tp, dg). The females are distinguished from the remaining species of the genus by the small median septum in the epigynum ( Fig. 51 View FIGURES 49 – 53 ) and the very long fertilization ducts in the vulva ( Fig. 52 View FIGURES 49 – 53 ).

Description. Male (IBSP 54468): Dorsal shield of prosoma orange with brown marks at margin, in front of coxae I–III, a V-shaped mark at the base of cephalic region and two lateral marks behind PLE. Chelicerae and pedipalps orange. Legs orange with brown spots at the base of spines. Sternum pale yellow with slightly darker margins. Labium and endites pale yellow, distally lighter. Opisthosoma brownish gray, laterally brown and with median faint brown chevrons on posterior half. Total length 7.8. Prosoma: 3.3 long, 3.2 wide. Opisthosoma: 4.3 long, 2.0 wide. Eye diameters: 0.24, 0.24, 0.20, 0.22; interdistances: 0.12, 0.04, 0.34, 0.24, 0.14, 0.12. Leg measurements: I: 23.3 (5.9, 2.0, 6.7, 6.7, 2.0); II: 28.7 (7.2, 2.2, 8.4, 8.5, 2.4); III: 15.9 (4.6, 1.6, 4.2, 4.2, 1.3); IV: 18.3 (5.2, 1.5, 4.8, 5.2, 1.6). Spination follows the generic pattern, except femur IV: r1- 1-1. Palp ( Fig. 78 View FIGURES 71 – 82 ): RTA simple with no lobes or projections, slightly bent at tip ( Figs 49–50 View FIGURES 49 – 53 ). Tegulum with large squared projection ( Fig. 49 View FIGURES 49 – 53 ; tp). Embolus with well developed pars pendula ending at a triangular subdistal projection ( Fig. 49 View FIGURES 49 – 53 ; ppl, sp).

Female (IBSP 54561): Coloration pattern as in male. Total length 9.4. Prosoma: 3.5 long, 3.4 wide. Opisthosoma: 5.6 long, 3.0 wide. Eye diameters: 0.20, 0.20, 0.16, 0.20; interdistances: 0.18, 0.04, 0.32, 0.30, 0.14, 0.14. Leg measurements: I: 16.8 (4.7, 1.8, 4.5, 4.4, 1.4); II: 19.5 (5.5, 2.0, 5.5, 4.9, 1.6); III: 12.8 (3.8, 1.4, 3.4, 3.1, 1.1); IV: 14.0 (4.5, 1.3, 3.6, 3.5, 1.1). Spination follows the generic pattern. Epigynum: epigynal field oval, wider than long, with small, chalice-shaped median septum; touching part of lateral lobes slightly shorter than median septum ( Fig. 51 View FIGURES 49 – 53 ). Vulva: pp with 9–10 linearly arranged lobes; fd transversal, almost twice as long as pp (Figs 5253).

Variation. Males (n = 7): total length 5.9–8.5; prosoma 2.4–3.7; femur I: 4.8–5.9. Females (n = 8): 7.0– 10.4; prosoma 3.0–3.5; femur I 3.8–4.7.

Distribution. Northeastern littoral of São Paulo and islands near Ubatuba and São Sebastião ( Fig. 86 View FIGURE 86 ).