Soesilarishius cearensis, 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 : 595-596

Soesilarishius cearensis sp. nov.

Figs 34–35, 39 , 41–45 , 49

Type material: Holotype: male from Floresta Nacional do Araripe, Crato/Barbalha, Ceará, Brazil, II.2010, L.S. Carvalho (MPEG 20292). Paratype: 1 female, same data as holotype, MPEG 20293.

Etymology. The specific epithet is a toponym and refers to the state from which the type specimens were collected.

Diagnosis. Males of this species are very similar to those of S. bicrescens sp. nov. by having the same embolus shape, but can be distinguished from that species by the more slender embolus (see Figs 49–50 ). Females slightly resemble those of S. flagellator sp. nov. by the position of the copulatory openings and the slightly advanced pocket, but can be recognized by the shorter ducts and smaller openings ( Figs 44–45 ).

Description. Male holotype: Total length: 2.70. Carapace dark brown, 1.25 long, 0.85 wide, 0.66 high, with sparse white scales ( Fig. 34 ). Ocular quadrangle 0.68 long. Anterior eye row 0.95 wide and posterior 0.80 wide. Chelicera, endite, labium and sternum dark brown. Palp with small and ventrally curved RTA, kidney-shaped tegulum and strongly curved, elongate embolus, apparently arising freely at embolic hematodocha ( Figs 41–43 ). Legs 1342, dark brown, except for metatarsi and tarsi yellow; articles with prolateral and retrolateral faces darker. Length of femur: I 0.80, II 0.57, III 0.76, IV 0.64; patella + tibia: I 0.85, II 0.64, III 0.76, IV 0.66; metatarsus + tarsus: I 0.66, II 0.57, III 0.71, IV 0.52. Spines on forth legs not strongly elongate. Abdomen dark brown, with anterior border covered with white scales (but interrupted in the middle), and a pair of curved, light marks on the posterior half, light stain over the anal tubercle ( Fig. 34 ). Spinnerets dark brown.

Female (paratype): Total length: 2.61*. Carapace yellow, 1.33* long, 0.90* wide, with cephalic region black and posterior portion light brown ( Fig. 35 ). Ocular quadrangle 0.64* long. Anterior eye row 0.99 wide and posterior 0.76* wide. Chelicera, endite, palp, labium, sternum yellow. Legs 3412, yellow; distal femur IV, proximal tibia IV and proximal metatarsus IV dark brown ( Fig. 39 ). Length of femur: I 0.76, II 0.64, III 0.80, IV 0.76; patella + tibia: I 0.90, II 0.68, III 0.85, IV 0.78; metatarsus + tarsus: I 0.64, II 0.57, III 0.78, IV 0.85. Spination as in male. Abdomen as in male, except for the additional pair of clear round spots in the middle ( Fig. 35 ) and the venter, cream-colored ( Fig. 39 ). Epigyne with slightly advanced pocket and small, anterior copulatory openings leading to sinuous ducts that flow backwards and enter small spermathecae; fertilization ducts arise beside pores of nutritive glands ( Figs 44–45 ). Spinnerets yellow.

Note. Although the epigyne was intact, carapace was slightly shrunk in the only female available ( Fig. 35 ). The asterisk (*) after measures above mean they are not precise, however informative.

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

Figures

FIGURES 34 – 40. Soesilarishius cearensis sp. nov. 34 male habitus; 35 female habitus; 39 female, lateral view. Soesilarishius bicrescens sp. nov. 36 male habitus. Soesilarishius flagellator sp. nov. 37 male habitus; 38 female habitus; 40 female, lateral view.

FIGURES 41 – 45. Soesilarishius cearensis sp. nov. 41 – 43 left male palp, slightly expanded (41 ventral, 42 retrolateral, 43 proventral); 44 epigyne, ventral view; 45 vulva, dorsal view, cleared.

FIGURES 49 – 50. Soesilarishius cearensis sp. nov. 49 left male palp, slightly expanded, proventral view, showing detail of embolus. Soesilarishius bicrescens sp. nov. 50 left male palp, slightly expanded, proventral view, showing detail of embolus.