Scytodes guapiassu Rheims & Brescovit, 2009, new species

Scytodes guapiassu new species

Figs. 32–37

Type material: Holotype: male from Reserva Biológica de Una, Una [15°18' S; 39°04' W], Bahia, Brazil, 15–28 November 2000, A D. Brescovit et al., deposited in IBSP 53666.

Paratypes: BRAZIL: Bahia: Una [15°18' S; 39°04' W] (Reserva Biológica de Una), 23 2Ƥ, 15–28 November 2000, A D. Brescovit et al. (IBSP 53671, 53673, 53668). Espírito Santo: Santa Tereza [19°55' S; 40°36' W], 43, April – August 2007, T. Souza et al. (MZSP 28955, IBSP 87971). Rio de Janeiro: Cachoeiras de Macacú [22°28' S; 42°38' W] (Reserva Ecológica de Guapi-Assú), 2Ƥ, 8–12 November 2001, Equipe Biota (IBSP 97161, MZSP 28956).

Other material examined. BRAZIL: Bahia: Una [15°18' S; 39°04' W], (Reserva Biológica de Una), 4Ƥ, 15–28 November 2000, A D. Brescovit et al. (IBSP 53664, 46886, 53665). Rio de Janeiro: Teresópolis (Parque Nacional da Serra dos Orgãos) [22°27' S; 42°59' W], 2Ƥ, 18–22 August 2001, Equipe Biota (IBSP 92289, 92290); Cachoeiras de Macacú (Reserva Ecológica de Guapi-Assú) [22°28' S; 42°38' W], 1Ƥ, 8–12 November 2001, Equipe Biota (IBSP 97162); Volta Redonda (Floresta da Cicuta) [22°31' S; 44°07' W], 5Ƥ, 11–18 June 2001, Equipe Biota, (IBSP 97153–97155).

Etymology. The specific name is a noun in apposition and refers to the type locality of some of the paratypes.

Diagnosis. Males of S. guapiassu n.sp. are distinguished from those of the remaining Scytodes by the palp with a subdistal, ventral lamina (Fig. 33–35). The females are distinguished by the single, large hyaline pocket with large lateral sclerotized areas in the epigynum (Fig. 37).

Description. Male (Holotype, IBSP 53666) Carapace pale orange, medially lighter, with brown pattern as shown on Fig. 32. Chelicerae pale orange with dorsal, longitudinal, brown stripe. Pedipalps pale orange with dorsal and prolateral brown markings. Labium and endites pale yellow. Sternum pale yellow with brown margins in front of each coxae. Legs pale orange. Femur I–IV with pair of ventral, longitudinal brown stripes. Tibia I–IV with median, transversal brown band and brown distal extremities. Abdomen pale gray with black pattern (Fig. 32). Total length 3.9. Carapace slightly domed, 2.0 long, 1.6 wide. Eye diameters: PME 0.14, ALE 0.16, PLE 0.16. Lateral eyes on a tubercle. Chelicerae with subapical hyaline keel and 6–7 slightly conspicuous stridulatory ridges. Labium 0.16 long, 0.28 wide. Sternum 1.02 long, 0.88 wide. Leg measurements: I: femur 5.8, patella 0.5, tibia 6.6, metatarsus 7.7, tarsus 0.8, total 21.4; II: 4.0, 0.5, 4.1, 4.7, 0.7, 14.0; III: 2.4, 0.5, 2.2, 2.6, 0.5, 8.2; IV: 3.8, 0.5, 3.4, 4.0, 0.5, 12.2. Palpal femur with stridulatory pick short and stout on triangular, projected socket. Cymbium with pair of strong, distal spines (Fig. 33). Bulb 0.64 long, medially constricted. Distal region spoon-like with retrolateral, sclerotized process and subdistal, ventral lamina (Figs. 33–35). Abdomen 1.9 long, 1.4 wide, covered with slender hairs.

Female (Paratype, IBSP 53673). Coloration pattern as in male. Total length 3.7. Carapace domed, 2.3 long, 2.0 wide. Eye diameters: PME 0.16, ALE 0.14, PLE 0.16. Lateral eyes on a tubercle. Chelicerae as in male. Labium 0.2 long, 0.2 wide. Sternum 1.08 long, 0.96 wide. Leg measurements: I: femur 3.7, patella 0.6, tibia 4.0, metatarsus 4.8, tarsus 0.8, total 13.8; II: 2.9, 0.5, 2.9, 3.2, 0.6, 10.1; III: 1.9, 0.5, 1.5, 2.0, 0.5, 6.4; IV: 2.8, 0.5, 2.5, 2.8, 0.7, 9.3. Palpal femur as in male. Epigynum with large and ridged, slightly V-shaped positioning ridges (Fig. 36). Vulva with rounded spermathecae on short stalks adjacent to single, large, hyaline pocket with large, lateral sclerotized areas (Fig. 37). Abdomen 2.7 long, 1.8 wide, as in male.

Variation. Seven males: total length 3.4–4.0; carapace 1.8–2.1; femur I 4.1–5.8; bulb 0.58–0.64. Ten females: total length 4.2–5.0; carapace 2.0–2.4; femur I 2.6–3.8.

Distribution. Atlantic Forest. Known from southern state of Bahia to northern state of Rio de Janeiro.