Soesilarishius albipes, Ruiz, 2011

Ruiz, Gustavo Rodrigo Sanches, 2011, Systematics of the genus Soesilarishius (Araneae: Salticidae: Euophryinae), Zootaxa 3022 (1), pp. 22-38 : 34-35

Soesilarishius albipes sp. nov.

Figs 36–37, 39–42, 55–56, 62–63

Type material: Holotype: male from Serra de São José , Feira de Santana, Bahia, Brazil, 12º08’S, 39º01’W, 22.VIII.2009 – 09.VIII.2010, G. da S.C. Ferreira ( IBSP 160819 ) . Paratype: 1 male and 2 females, same data as holotype, IBSP 160817 , 160812 , 160816 .

Additional material examined. BRAZIL: Bahia: 2 males and 3 females, Feira de Santana, Serra de São José , 22.VIII.2009 – 09.VIII.2010, G. da S.C. Ferreira ( IBSP 160813–160815 , 160818 , 160820 ) .

Etymology. The specific epithet is a Latin combination in apposition and refers to the light front legs present in males.

Diagnosis. Males of this species are similar to those of S. cymbialis sp. nov. and S. dromedarius sp. nov. by the straight embolus pointing towards the tip of the cymbium (see Figs 16, 39, 43) but can be distinguished from the former by having a shorter cymbium and from the latter by having a simple RTA pointing ventrally ( Fig. 40). The epigyne reminds those of S. cymbialis sp. nov. and S. minimus sp. nov., but can be distinguished from the former by having much larger spermathecae ( Fig. 42) and from the latter by the position of the fertilization ducts, arising from a projection pointing forward ( Fig. 42), not backwards as in S. minimus sp. nov. ( Fig. 5).

Description. Male holotype: Total length: 2.90. Carapace dark brown, 1.42 long, 0.97 wide, 0.67 high, with cephalic region black ( Figs 36, 55–56). Ocular quadrangle 0.67 long. Anterior eye row 0.92 wide and posterior 0.90 wide. Chelicera light brown. Labium and sternum light brown. Endite light brown, slightly projected laterally. Palp light brown, with a simple RTA pointing ventrally, a slightly elongate tegulum with a well developed sperm loop and a poorly developed distal bump, and a straight embolus at the distal end of the tegulum ( Figs 39–40). Legs 4132; femora I–II dark brown; III–IV dark brown proximally and distally, yellow medially; patella I yellow; II–IV yellow with dark brown borders; tibia I yellow with dark brown border; II–IV and metatarsi I–IV as femora II–IV; tarsi I–IV dark brown proximally, yellow distally. Length of femur: I 0.82, II 0.68, III 0.74, IV 0.80; patella + tibia: I 0.98, II 0.78, III 0.81, IV 0.88; metatarsus + tarsus: I 0.76, II 0.70, III 0.81, IV 1.00. Spination: femur I d1-1-1, II d1-1-1, p0-0-1, III d1-1-1, IV d1-1-1, p0-0-1; patella I–II 0, III r1, IV p1, r1; tibia I v1r-2-2 (for proportion, see Fig. 62), II v1r-1r-1r, p1, III–IV p1-1, r1-1; metatarsus I v2-2, II v2-2, p1-1, III v1p-1p, p1-2, r1-2, IV v2-1p, p1-2, r0-2. Abdomen dorsally dark brown, variegated ( Fig. 36); ventrally dark brown, variegated. Anterior spinnerets dark brown, others yellow.

Female (paratype IBSP 160816): Total length: 3.55. Carapace dark brown, 1.65 long, 1.15 wide, 0.75 high, with cephalic region black ( Fig. 37). Ocular quadrangle 0.85 long. Anterior eye row 1.07 wide and posterior 1.07 wide. Chelicera light brown. Endite, labium, sternum and palp light brown. Legs 4312; femur I light brown; II–IV dark brown proximally and distally, yellow medially; patellae yellow with dark brown borders; tibiae and metatarsi as femora II–IV; tarsi dark brown proximally, yellow distally. Length of femur: I 0.82, II 0.78, III 0.86, IV 0.94; patella + tibia: I 1.08, II 0.94, III 0.97, IV 1.10; metatarsus + tarsus: I 0.76, II 0.74, III 0.96, IV 1.24. Spination: femur I d1-1-1, II d1-1-1, p0-0-1, III d1-1-1, IV d1-1-1, p0-0-1; patella I–II 0, III–IV r1; tibia I v2-2-2 (for proportion, see Fig. 63), II v1r-2-1r, p1, III v1p-0, p1-1, r1-1, IV p1-1, r1-1; metatarsus I v2-2, II v2-1r, p1-1, III v2-1p, p1-2, r1-2, IV v2-1p, p1-2, r1-2. Abdomen as in male ( Fig. 37). Epigyne with a posterior pocket and anterior circular copulation openings, copulation ducts with scent glands extending forward, then to the center, then backwards to the large primary spermathecae, whose walls have pores of nutritive glands beside the projections from which the fertilization ducts arise ( Figs 41–42). Spinnerets yellow.

Variation. Carapace length: 1.425–1.60 (males, n=4), 1.60–1.70 (females, n=5).

Distribution. Known only from the State of Bahia, Brazil.

Biological note. The specimens mentioned above were collected from the ground using pitfall traps.