Scytodes antonina, 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 : 28-29

Scytodes antonina new species

Figs. 100–105

Type material: Holotype: male from, Reserva do Rio Cachoeira, Antonina [25°26' S; 48°43' W], Paraná, Brazil, 13–19 April 2004, H. Höfer et al., deposited in IBSP 116695.

Paratypes: BRAZIL. São Paulo: Ilhabela [23°46' S; 45°21' W] (Parque Estadual de Ilhabela), 1Ƥ, 9–15 October 2001, Equipe Biota ( IBSP 92321); Iporanga [24°32' S; 48°40' W] (Parque Estadual Turístico do Alto Ribeira, Gruta do Ouro Grosso), 1Ƥ, 8–15 November 2001, Equipe Biota ( IBSP 38420). Paraná: Antonina [25°26' S; 48°43' W] (Reserva do Rio Cachoeira), 23 4Ƥ, 13–19 April 2004, H. Höfer et al. ( IBSP 116691–116694); Morretes [25°26' S; 48°55' W] (Parque Estadual do Marumbi), 1Ƥ, 6–9 April 1999, R. Pinto da Rocha & A. Chagas Jr. ( MZSP 18707); ( IAPAR, Estação 2), 1Ƥ, 28–29 October 1995, A B. Bonaldo (MCN 27019).

Other material examined: BRAZIL. São Paulo: Santos [23°51'53.1" S; 46°18'15.7" W] (Vale do Rio Jurubatuba ), 2Ƥ, March – December 2007, A.A. Nogueira ( IBSP 92521, 92515); Ilhabela [23°46' S; 45°21' W] (Parque Estadual de Ilhabela), 2Ƥ, 9–15 October 2001, Equipe Biota ( IBSP 92319, 92320); Paraná: Antonina [25°26' S; 48°43' W] (Reserva do Rio Cachoeira), 2Ƥ, 13–19 April 2004, H. Höfer et al. ( IBSP 116696, 116697).

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

Diagnosis. The males of Scytodes antonina n.sp. are distinguished from those of the remaining Neotropical Scytodes by the palp with a dorsal, oblique hyaline membrane ( Figs. 101–102 ) and a retrolateral, long, sclerotized process ( Figs. 102–103 ). The females are distinguished by a single, very large and rounded hyaline pocket with lateral, oval, sclerotized areas ( Fig. 105 ).

Description. Male (Holotype, IBSP 116695). Carapace pale orange with brown pattern as shown on Fig. 100 . Chelicerae pale orange with dorsal, longitudinal brown stripe. Pedipalps pale orange. Labium and endites pale yellow. Sternum cream colored with faint brown markings in front of each coxae. Legs yellow. Femur I- IV with ventral pair of longitudinal black stripes. Tibia I-IV with black extremities. Abdomen gray with black pattern ( Fig. 100 ). Total length 3.5. Carapace slightly domed, 1.7 long, 1.5 wide. Eye diameters: PME 0.16, ALE 0.14, PLE 0.14. Lateral eyes on a tubercle. Chelicerae with subapical hyaline keel and inconspicuous stridulatory ridges. Labium 0.10 long, 0.20 wide. Sternum 0.92 long, 0.74 wide. Leg measurements: I: femur 3.6, patella 0.6, tibia 3.9, metatarsus 4.7, tarsus 0.5, total 13.3; II: 2.6, 0.5, 2.5, 3.0, 0.5, 9.1; III: 1.7, 0.4, 1.4, 1.7, 0.4, 5.6; IV: 2.4, 0.5, 2.2, 2.5, 0.6, 8.2. Palpal femur with stridulatory pick long and slender on rounded and projected socket. Cymbium with single, short distal spine ( Fig. 102 ). Bulb 0.70 long, medially constricted and slightly sinuous. Distal area with a dorsal, oblique hyaline membrane ( Figs 101–102 ) and longer retrolateral sclerotized process ( Figs. 102–103 ). Abdomen 1.7 long, 1.4 wide, covered with slender hairs.

Female (Paratype, IBSP 92321) Coloration pattern as in male. Total length 4.7. Carapace domed, 2.1 long, 1.9 wide. Eye diameters: PME 0.14, ALE 0.14, PLE 0.14. Lateral eyes on a tubercle. Chelicerae as in male. Labium 0.16 long, 0.28 wide. Sternum 1.04 long, 0.86 wide. Leg measurements: I: femur 2.7, patella 0.5, tibia 2.8, metatarsus 3.1, tarsus 0.6, total 9.7; II: 2.1, 0.5, 2.2, 2.6, 0.6, 8.0; III: 1.6, 0.5, 1.3, 1.6, 0.4, 5.4; IV: 2.2, 0.5, 2.0, 2.2, 0.6, 7.5. Palpal femur as in male. Abdomen 2.6 long, 2.4 wide, covered with slender hairs. Epigynum with slightly triangular epigynal pouch and narrow positioning ridges with slightly triangular foveas separated from each other by 3–4 times their width ( Fig. 104 ). Vulva with single, large, hyaline pocket with lateral, oval sclerotized areas and adjacent round spermathecae ( Fig. 105 ).

Variation. Three males: total length 3.2–3.5; femur I 3.5–3.6; bulb 0.70–0.72. Ten females: total length 3.9–5.2; carapace 1.8–2.2; femur I 2.0–2.8.

Distribution. Atlantic Forest. Eastern states of São Paulo and Paraná.

Figures

FIGURES 94 – 105. 94 – 96. Scytodes genebra n. sp. 94. Female habitus, dorsal. 95 – 96. Female epigynum (95 ventral, 96 dorsal). 97 – 99. Scytodes itapecerica n. sp. 97. Female habitus, dorsal. 98 – 99. Female epigynum (98 ventral, 99 dorsal). 100 – 105. Scytodes antonina n. sp. 100. Male habitus, dorsal. 101 – 103. Left male palp (101 prolateral, 102 retrolateral, 103 detail of distal region, dorsal). 104 – 105. Female epigynum (104 ventral, 105 dorsal) (EP = epigynal pouch; H = hyaline membrane; HP = hyaline pocket; S = spermathecae; AS = sclerotized área; SP = sclerotized process). Scale lines: 0.5 mm.