Caayguara albus ( Mello-Leitão, 1918 ) Mello-Leitao, 1918

Rheims, Cristina A., 2010, Caayguara, a new genus of huntsman spiders from the Brazilian Atlantic Forest (Araneae: Sparassidae), Zootaxa 2630, pp. 1-29 : 4-7

Caayguara albus ( Mello-Leitão, 1918) comb. nov.

Figs 14 –18, 71, 83

Olios albus Mello-Leitão, 1918: 44 , Figs 13–15 ( Male holotype from Pinheiro [currently Pinheiral], Rio de Janeiro, Brazil, should be deposited in MNRJ, not located, probably lost). Roewer 1954: 704; Bonnet 1958: 3163; Platnick 2010.

Material examined. BRAZIL: Espírito Santo: 13, São José do Calçado [21 °01' S; 41 ° 39 ' W], Usina Hidrelétrica de Rosal, Rio Itabapoana ( IBSP 26404); Rio de Janeiro: 13, 3Ƥ, Teresópolis, Parque Nacional da Serra dos Órgãos [22 º 27 ' S; 42 º 59 ' W] ( IBSP 54494, 54499, 54501, 54579); 23, Pinheiral, Fazenda Santa Helena [22 º 31 ' S; 43 º 59 ' W] ( IBSP 43283–43284); 13, Mangaratiba, Ilha da Marambaia [23 º04' S; 43 º 58 ' W] ( IBSP 115630); São Paulo: 13, São Paulo, Parque Estadual da Serra da Cantareira [23 ° 25 ' S; 46 ° 38 ' W], núcleo Pedra Grande ( MZSP 31773); 13, núcleo Pinheirinho ( MZSP 31774); 23, núcleo Sede ( MZSP 31775–31776); 13, Mogi das Cruzes [23 º 31 ' S; 46 º 11 ' W], Parque Natural Municipal da Serra do Itapety ( IBSP 54571); 1 Ƥ, Rio Tietê ( IBSP 13834); 1 Ƥ, Biritiba Mirim [23 º 34 ' S; 46 º02' W], Barragem do Rio Biritiba Mirim ( IBSP 122415); 13, Embu [23 º 38 ' S; 46 º 51 ' W] ( IBSP 59632); 23, 3Ƥ, São Paulo, Reservatório do Guarapiranga, Parque Ilha dos Eucaliptos [23 º 44 ' S; 46 º 44 ' W] ( IBSP 62066–62070); 23, Ribeirão Grande, Parque Estadual Intervales [24 º05' S; 48 º 22 ' W] ( IBSP 71420, 80106); 1 Ƥ, Iporanga, Parque Estadual Alto da Ribeira ( PETAR) [24 º 35 ' S; 48 º 35 ' W] ( IBSP 54533); Paraná: 1 Ƥ, Lapa [25 º 46 ' S; 49 º 43 ' W] ( IBSP 11808).

Diagnosis. Caayguara albus ( Mello-Leitão, 1918) resembles C. pinda sp. nov. by the general conformation of the male palp, with the distal region of the embolus strongly curved and tegular projections arising medially close to the base of the conductor ( Figs 14, 19; tp), and female epigynum, with an anterior medium septum at least twice as long as wide ( Figs 16, 21). It can be distinguished from the latter species by the massive RTA with a thick distal hook ( Fig. 15) and by the long, distally blunt tegular projection ( Figs 14– 15; tp) of the male palp, by the champagne flute shape of the medium septum ( Fig. 16; MS) in the female epigynum, and by the vulva with larger number of lobes on the posterior part (pp) of the copulatory duct ( Fig. 17).

Redescription. Male ( MZSP 31775): Dorsal shield of prosoma, chelicerae, legs and pedipalps pale yellow. Sternum pale yellow with slightly darker margins. Labium and endites cream colored. Opisthosoma cream colored. Total length 6.9. Prosoma: 2.8 long, 3.8 wide. Opisthosoma: 4.0 long, 1.8 wide. Eye diameters: 0.20, 0.18, 0.12, 0.18; interdistances: 0.12, 0.06, 0.26, 0.18, 0.12, 0.12. Leg measurements: I: 20.1 (5.1, 1.8, 5.7, 5.6, 1.9); II: 23.6 (6.0, 1.9, 6.7, 6.7, 2.3); III: 14.2 (4.0, 1.4, 3.9, 3.7, 1.2); IV: 16.3 (4.7, 1.4, 4.4, 4.5, 1.3). Spination follows the generic pattern except metatarsus III: v 2 - 2 - 1; metatarsus IV: p 1 - 1 - 1. Palp ( Fig. 71): RTA with distal hook and two large ventral lobes ( Fig. 15; dl, bl); dorsal projection absent. Tegulum with tegular projection arising medially, close to the base of conductor ( Figs 14–15; tp). Embolus with long and slender ventral keel ( Fig. 14; vk); distal region strongly curved and bifid with a subdistal triangular projection ( Fig. 14; sp); pars pendula inconspicuous.

Description. Female ( IBSP 54574): Coloration pattern as in male. Total length 9.3. Prosoma: 3.2 long, 3.2 wide. Opisthosoma: 5.6 long, 3.3 wide. Eye diameters: 0.16, 0.14, 0.12, 0.14; interdistances: 0.20, 0.14, 0.32, 0.30, 0.16, 0.16. Leg measurements: I: 13.9 (3.9, 1.7, 3.6, 3.4, 1.3); II: 16.3 (4.6, 1.9, 4.3, 4.0, 1.5); III: 10.8 (3.3, 1.2, 2.7, 2.5, 1.1); IV: 11.9 (3.7, 1.3, 3.0, 2.8, 1.1). Spination follows the generic pattern, except tibiae I–III: d0. Epigynum: epigynal field slightly rounded anteriorly, as long as wide; median septum longer than wide ( Fig. 16; MS); touching part of lateral lobes slightly shorter than median septum ( Fig. 16; LL). Vulva: pp with 8–9 small linearly arranged lobes ( Fig. 17); fd slender, as long as pp ( Figs 17–18).

Variation. Males (n = 8): total length 6.0– 7.7; prosoma 2.6–3.3; femur I 4.1–5.6. Females (n = 3): total length 8.8–9.5; prosoma 2.8–3.3; femur I 3.9 –4.0.

Distribution. Southeastern Atlantic Forest, from São José do Calçado, Espírito Santo to Lapa, Paraná ( Fig. 83).