Soesilarishius macrochelis, Ruiz, Gustavo Rodrigo Sanches, 2013

Ruiz, Gustavo Rodrigo Sanches, 2013, Nine new species of Soesilarishius from Brazil (Araneae: Salticidae: Euophryinae), Zootaxa 3664 (4), pp. 586-600 : 588-590

Soesilarishius macrochelis sp. nov.

Figs 4–6 , 13–16

Type material: Holotype: male from Floresta Nacional do Araripe, Crato/Barbalha, Ceará, Brazil, II.2010, L.S. Carvalho (MPEG 20278). Paratype: 1 female, same data as holotype, MPEG 20279.

Etymology. The specific epithet is a noun (Latin) in apposition and refers to the enlarged chelicerae of males ( Fig. 6 ), uncommon in the genus.

Diagnosis. Males can be distinguished from any other known species by the enlarged chelicerae ( Fig. 6 ), while females can be recognized by the flaps arising at the posterior borders of the copulatory openings of the epigyne ( Fig. 15 ).

Description. Male holotype: Total length: 3.80. Carapace dark brown, 2.01 long, 1.37 wide, 0.97 high, with sparse white and golden scales ( Figs 4, 6 ). Ocular quadrangle 0.90 long. Anterior eye row 1.28 wide and posterior 1.18 wide. Chelicera brown, enlarged ( Fig. 6 ). Labium, sternum and endite yellow. Palp yellow, with strongly curved RTA and short embolus ( Figs 13-14 ). Legs 1432; coxae and trochanters light brown; femur I dark brown, patella I and tibia I yellow; metatarsus I and tarsus I yellow, proximally dark brown; II-IV yellow, distal femora, distal tibiae, distal and proximal metatarsi and proximal tarsi dark brown. Length of femur: I 1.42, II 0.99, III 1.14, IV 1.09; patella + tibia: I 1.80, II 1.23, III 1.23, IV 1.28; metatarsus + tarsus: I 1.18, II 1.04, III 1.18, IV 1.42. Spination not elongate on forth legs, as in S. albipes (Ruiz, 2011, fig. 62). Abdomen cream-colored, variegated, with a dorsal light brown scutum; ventrally dark brown ( Fig. 4 ). Anterior spinnerets yellow, posterior dark brown.

Female (paratype): Total length: 3.80. Carapace as in male, 2.01 long, 1.47 wide, 1.04 high ( Fig. 5 ). Ocular quadrangle 1.06 long. Anterior eye row 1.37 wide and posterior 1.28 wide. Chelicera, endite, labium, sternum and palp light brown. Legs 4312, light brown; femora, tibiae and metatarsi proximally and distally dark brown, tarsi proximally dark brown, all articles fading from leg I to IV. Length of femur: I 1.09, II 1.04, III 1.18, IV 1.23; patella + tibia: I 1.42, II 1.18, III 1.23, IV 1.42; metatarsus + tarsus: I 0.95, II 0.95, III 1.28, IV 1.59. Spination: as in male. Abdomen dorsally variegated with dark brown ( Fig. 5 ); ventrally cream-colored. Epigyne with no conspicuous median pocket, copulatory openings wide apart, with flaps on the posterior borders; copulatory ducts flow to the center, curve backwards and enter round spermathecae; nutritive glands near the fertilization ducts, which arise anteriorly ( Figs 15–16 ). Spinnerets light brown.

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

Figures

FIGURES 1 – 7. Soesilarishius chaplini sp. nov. 1 male habitus; 2 female habitus; 3 male face. Soesilarishius macrochelis sp. nov. 4 male habitus; 5 female habitus; 6 male face. Soesilarishius tabernarius sp. nov. 7 male habitus.

FIGURES 13 – 18. Soesilarishius macrochelis sp. nov. 13 – 14 left male palp, slightly expanded (13 ventral, 14 retrolateral); 15 epigyne, ventral view; 16 vulva, dorsal view, cleared. Soesilarishius tabernarius sp. nov. 17 – 18 left male palp (17 ventral, 18 retrolateral).