Helvetia stridulans, Gustavo R. S. Ruiz & Antonio D. Brescovit, 2008

Gustavo R. S. Ruiz & Antonio D. Brescovit, 2008, Revision of Helvetia (Araneae: Salticidae: Heliophaninae), Revista Brasileira de Zoologia 25 (1), pp. 139-147 : 145-146

Helvetia stridulans sp. nov.

Figs 19-20

Type. Male holotype from AFA Jacarenema , Vila Velha, Espírito Santo, Brazil, 12.X.2005, Exp. ESFA leg., deposited in IBSP 78638 .

Etymology. The specific name is a present participle taken from Latin and refers to the stridulatory apparatus on the femora Iand carapace of most Heliophaninae .

Diagnosis. Male of this species can easily be recognized by very long embolus, arising proximally from the retrolateral side of the tegulum and having a retrolateral loop on its tip ( Fig. 19 ). This is also the only known species that has a ventral branch more developed than the dorsal branch of the RTA ( Fig. 20 ).

Description. Male (holotype). Total length: 3.40. Carapace brown, 1.60 long, 0.90 wide, 0.55 high, with white scales laterally. Cephalic area black. Ocular quadrangle 0.75 long. Anterior eye row 0.85 wide and posterior 0.80 wide. Chelicera dark brown. Endite, labium and sternum brown. Palp as in figures 19 and 20. Legs 4132, I black, with femur and patella brown, II-IV whitish with few brown stripes. Length of femur: I 0.65, II 0.60, III 0.65, IV 0.85; patella + tibia: I 1.05, II 0.70, III 0.70, IV 1.00; metatarsus + tarsus: I 0.55, II 0.50, III 0.70, IV 0.80. Spination. Femur I, II, III, IV d1-1-1; tibia I 0, II v1 pr, III 0, IV v1 -0-2; metatarsus I v2-2, II 1 rpr, III p1di, r1di, IV v2 di, p1di, r1di. Abdomen brown, with a pair of white spots on the anterior third and two transverse median white stripes. Spinnerets black.

Female. Unknown.

Additional material examined. None.

Distribution. Known only from the state of Espírito Santo, Brazil.

Figures

Figures 15-20. Left palp of (15-16) Helvetia galianoae: (15) ventral view̡ (16) retrolateral view; (17-18) Helvetia humillima: (17) ventral view̡ (18) retrolateral view; (19-20) Helvetia stridulans: (19) vental view̡ (20) retrolareal view. Bars = 0.25 mm.