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

http://doi.org/ 10.5281/zenodo.198317

persistent identifier

http://treatment.plazi.org/id/03CF8789-FFB0-071B-FF22-FBAE1175E182

treatment provided by

Plazi

scientific name

Caayguara itajucamussi
status

sp. nov.

Caayguara itajucamussi  sp. nov.

Figs 49 –53View FIGURES 49 – 53, 78View FIGURES 71 – 82, 86View 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: 1 ɞ, 2 Ƥ, with the same data as holotype ( IBSP 54463; 54466); 2 ɞ, 2 Ƥ, Parque Estadual Ilha Anchieta [23 º 32 ' S; 45 º03' W], Ubatuba, São Paulo, Brazil, 23–30 July 2002, Equipe Biota leg. ( IBSP 54561–54562; MZSP 31791–31792).

Additional material examined. BRAZIL. São Paulo: 1 Ƥ, Ilhabela [23 ° 55 ' S; 45 ° 19 ' W], Parque Estadual Ilhabela ( IBSP 54462); 2 ɞ, 1 Ƥ, Morro Pacuíba ( MZSP 16927); 2 ɞ, 1 Ƥ, Ubatuba, Fazenda Angelim [23 º 24 ' S; 45 º03' W] ( IBSP 52263); 2 ɞ, 2 Ƥ, Parque Estadual Ilha Anchieta [23 º 32 ' S; 45 º03' W] ( IBSP 54440; 54442–54443; 54445); 1 ɞ, Bertioga [23 º 45 ' S; 45 º 54 ' 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 –50View FIGURES 49 – 53, 54– 55View FIGURES 54 – 58) and embolus showing a triangular subdistal projection ( Figs 49View FIGURES 49 – 53, 54View 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. 49View 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. 51View FIGURES 49 – 53) and the very long fertilization ducts in the vulva ( Fig. 52View 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: r 1 - 1 - 1. Palp ( Fig. 78View FIGURES 71 – 82): RTA simple with no lobes or projections, slightly bent at tip ( Figs 49–50View FIGURES 49 – 53). Tegulum with large squared projection ( Fig. 49View FIGURES 49 – 53; tp). Embolus with well developed pars pendula ending at a triangular subdistal projection ( Fig. 49View 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. 51View 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. 86View FIGURE 86).

IBSP

Instituto Biologico de Sao Paulo

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Sparassidae

Genus

Caayguara