Scytodes una, Rheims, Cristina A. & Brescovit, Antonio D., 2009

Rheims, Cristina A. & Brescovit, Antonio D., 2009, New additions to the Brazilian fauna of the genus Scytodes Latreille (Araneae: Scytodidae) with emphasis on the Atlantic Forest species, Zootaxa 2116, pp. 1-45 : 10-11

Scytodes una new species

Figs. 28–31

Type material. Holotype: male from Reserva Biológica de Una , Una [15°18' S; 39°04' W], Bahia, Brazil, 14 April 1998, A D. Brescovit et al., deposited in IBSP 18250.

Paratypes: BRAZIL: Bahia: Una [15°18' S; 39°04' W] (Reserva Biológica de Una ), Bahia, 23, 15–28 November 2000, A D. Brescovit et al. ( IBSP 53674; 53670). Rio de Janeiro: Nova Friburgo [22°16' S; 42°31' W] (Amparo), 13, 20 December 1993, A.B. Kury ( MNRJ 13066).

Other material examined. BRAZIL. Bahia: Una [15°18' S; 39°04' W] (Reserva Biológica de Una ), 33, 15–28 November 2002, A D. Brescovit et al. ( IBSP 53669; 53667; 46875).

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

Diagnosis. The males of S. una n.sp. are distinguished from those of the remaining Neotropical Scytodes by the presence of a ventral, hyaline lamina at the base of a slightly curved sclerotized process ( Figs. 30–31 ).

Description. Male (Holotype, IBSP 18250). Carapace orange with brown pattern, as shown on fig. 28. Chelicerae pale yellow with longitudinal brown stripe. Pedipalps pale yellow with prolateral and dorsal longitudinal brown stripe. Labium orange. Endites cream colored with brown margins. Sternum cream colored with brown margins in front of each coxae. Legs orange, except patella I brown. Femora I–IV with several longitudinal brown stains. Abdomen whitish gray with black pattern ( Fig. 28 ). Total length 3.8. Carapace slightly domed, 1.8 long, 1.6 wide. Eye diameters: PME 0.14, ALE 0.14, PLE 0.14. Lateral eyes on a tubercle. Chelicerae with subapical hyaline keel and inconspicuous stridulatory ridges. Labium 0.12 long, 0.20 wide. Sternum 0.96 long, 0.80 wide. Leg measurements: I: femur 5.2, patella 0.5, tibia 5.7, metatarsus 7.4, tarsus 0.8, total 19.6; II: 3.8, 0.5, 3.9, 4.4, 0.7, 13.3; III: 2.3, 0.5, 1.9, 2.5, 0.5, 7.7; IV: 3.5, 0.5, 3.3, 3.7, 0.6, 11.6. Palpal femur with short and stout stridulatory pick with rounded and slightly projected socket. Cymbium with one strong distal spine ( Figs. 29–30 ). Bulb 0.56 long, slightly constricted medially and slightly bent ventrally. Distal region spoon-shaped with ventral hyaline lamina at the base of slightly retrolateral, curved, sclerotized process ( Figs. 30–31 ). Abdomen 1.8 long, 1.2 wide, covered with short, slender hairs. Female unknown.

Variation. Seven males: total length 3.2–4.2; carapace 1.8–2.0; bulb 0.56–0.66.

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

Figures

FIGURES 22 – 31. 22 – 27. Scytodes sincora n. sp. 22. Male habitus, dorsal view; 23 – 25. Left male palp (23 prolateral, 24 retrolateral, 25 detail of distal region, dorsal); 26 – 27. Female epigynum (26 ventral, 27 dorsal). 28 – 31. Scytodes una n. sp. 28. Male habitus, dorsal view; 29 – 31. Left male palp (29 prolateral, 30 retrolateral, 31 detail of distal region, dorsal). (HL = hyaline lamina; K = keel; SA = sclerotized area; SP = sclerotized process). Scale lines: 0.5 mm.