Soesilarishius minimus, Ruiz, 2011

Ruiz, Gustavo Rodrigo Sanches, 2011, Systematics of the genus Soesilarishius (Araneae: Salticidae: Euophryinae), Zootaxa 3022 (1), pp. 22-38 : 24-26

Soesilarishius minimus sp. nov.

Figs 2–7 , 45–46

Type material: Holotype: male from Campo de Instrução Marechal Newton Cavalcante , Araçoiaba, Pernambuco, Brazil, 7º46’55”S, 35º09’02”W, 2009–2010, A.A. Costa ( IBSP 160703 ) . Paratypes: 1 male and 2 females, same data as holotype, IBSP 160758 , 160711 , 160704 , and 1 male and 1 female, same data as holotype, UFPE .

Additional material examined. BRAZIL: Pernambuco: 7 males and 26 females, Araçoiaba, Campo de Instrução Marechal Newton Cavalcante , 2009–2010, A.A. Costa ( IBSP 160705–160710 , 160712–160719 , UFPE) ; 15 males, Caruaru 2009–2010, H.P. Amorim ( IBSP 160515–160522 , UFPE) .

Etymology. The specific epithet is a Latin adjective (=smallest) referring to the small size of this species (see below).

Diagnosis. This species is similar to S. crispiventer sp. nov. for the small size and boxy carapace (see Figs 6– 7, 8–9 ), but can easily be distinguished from that and the remaining known species by having a small, spiraled embolus in the male palp ( Fig. 2 ) and fertilization ducts arising from elongate projections dorsally to the large spermathecae in the epigyne ( Fig. 5 ).

Description. Male holotype: Total length: 1.87. Carapace dark brown, 0.96 long, 0.63 wide, 0.42 high, cephalic region darker ( Fig. 6 , 45–46 ). Ocular quadrangle 0.42 long. Anterior eye row 0.68 wide and posterior 0.62 wide. Chelicera yellow. Labium and sternum yellow. Endite yellow, not projected laterally. Palp yellow, with a simple, short RTA, tegulum with a well developed sperm loop and a distal bump, and a short, distal, spiraled embolus ( Figs 2–3 ). Legs 4312, yellow. Length of femur: I 0.40, II 0.37, III 0.55, IV 0.47; patella + tibia: I 0.47, II 0.42, III 0.50, IV 0.50; metatarsus + tarsus: I 0.45, II 0.42, III 0.52, IV 0.62. Spination (some spines may be modified into thin setae): femur I–II d0-1-1, III d0-1-1, p0-0-1, IV d1-1-1; patella I–II 0, III p1, IV 0; tibia I v1r-2-2 (spine proportion similar to that described for S. crispiventer sp. nov., see Fig. 64 ), II v1r-1r-0, p0-1, III v1p-0-0, p0-1, r1-1, IV v0, p1-1, r1-1; metatarsus I–II v2-2, III v2-2, p1-2, r1-2, IV v0-2, p1-2, r1-1. Abdomen dorsally dark brown, with two dorsal pairs of groups of white scales on the anterior half, one pair lateral to the second pair, and one dorsal pair of transverse stripes of white scales on the posterior half ( Fig. 6 ); ventrally cream colored. Spinnerets yellow.

Female (paratype IBSP 160704): Total length: 1.97. Carapace dark brown, 0.97 long, 0.67 wide, 0.45 high, cephalic region black ( Fig. 7 ). Ocular quadrangle 0.52 long. Anterior eye row 0.70 wide and posterior 0.63 wide. Chelicera yellow. Labium, sternum, endite and palp yellow. Legs 4312; femora light brown, dark brown prolaterally and retrolaterally; patellae light brown with dark brown borders; tibiae as femora; metatarsi and tarsi light brown. Length of femur: I 0.45, II 0.42, III 0.52, IV 0.52; patella + tibia: I 0.52, II 0.46, III 0.50, IV 0.57; metatarsus + tarsus: I 0.45, II 0.42, III 0.55, IV 0.66. Spination (some spines may be modified into thin setae): femur I d0, II d0-1-1, III d0-1-1, p0-0-1, IV d1-1-1, p1di; patella I–IV 0; tibia I v2-2-2 (spine proportion similar to that described for S. crispiventer sp. nov., see Fig. 65 ), II v1r-1r-1r, p0-1, III–IV v0, p1-1, r1-1; metatarsus I–II v2-2, III v2-2, p1-2, r1-1, IV v1p-2, p1-2, r1-1. Abdomen dorsally dark brown, with scale pattern similar to that of male, but less conspicuous ( Fig. 7 ); ventrally light brown. Epigyne with small copulation openings, short copulation ducts and large primary spermathecae ( Figs 4–5 ). Spinnerets dark brown.

Variation. Carapace length: 0.96–1.12 (males, n=25), 0.95–1.05 (females, n=29).

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

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

Figures

FIGURES 1–5. Soesilarishius aurifrons (Taczanowski) comb. nov. 1 left male palp, ventral. Soesilarishius minimus sp. nov. 2–3 left male palp (2 ventral, 3 retrolateral); 4 epigyne, ventral view; 5 vulva, dorsal view.

FIGURES 6–9. Soesilarishius minimus sp. nov. 6 male habitus (paratype IBSP 160758); 7 female habitus (paratype IBSP 160711). Soesilarishius crispiventer sp. nov. 8 male habitus (paratype IBSP 160801); 9 female habitus (paratype IBSP 160841).

FIGURES 45–59. Soesilarishius minimus sp. nov. 45–46 male carapace (45 dorsal, 46 lateral); Soesilarishius crispiventer sp. nov. 47–48 male carapace (47 dorsal, 48 lateral); Soesilarishius cymbialis sp. nov. 49–50 male carapace (49 dorsal, 50 lateral); Soesilarishius lunatus sp. nov. 51–52 male carapace (51 dorsal, 52 lateral); Soesilarishius spinipes sp. nov. 53–54 male carapace (53 dorsal, 54 lateral); Soesilarishius albipes sp. nov. 55–56 male carapace (55 dorsal, 56 lateral); Soesilarishius dromedarius sp. nov. 57–58 male carapace (57 dorsal, 58 lateral); Soesilarishius crispiventer sp. nov. 59 male abdomen, ventral view.

FIGURES 60–65. Soesilarishius lunatus sp. nov. 60 male leg I, prolateral view, showing ventral spines; 61 female leg I, prolateral view, showing ventral spines; Soesilarishius albipes sp. nov. 62 male leg I, prolateral view, showing ventral spines; 63 female leg I, prolateral view, showing ventral spines; Soesilarishius crispiventer sp. nov. 64 male leg I, prolateral view, showing ventral spines; 65 female leg I, prolateral view, showing ventral spines.