Exocora girotii, Lemos, Yuji & Brescovit, Antonio D., 2013

Lemos, Yuji & Brescovit, Antonio D., 2013, New species of the spider genus Exocora Millidge, 1991 (Araneae: Linyphiidae) from Brazil, Zootaxa 3599 (3), pp. 261-278 : 266

Exocora girotii new species

Figs 4 A–D; 5A–F; 15B; 16B; 17

Types: Holotype 1ɗ, from Fazenda Angelim (23º23'49"S; 45º03'51"W), Ubatuba, São Paulo, Brazil, 13–16/II/ 2012, A. M. Giroti col. (IBSP 161827). Paratype: 1Ψ, from Estação Ecológica da Juréia-Itatins (24º33'S; 47º13'W), Peruíbe, São Paulo, Brazil, 26/IV–3/V/1999, A. D. Brescovit et al. col. (IBSP 24852); 2Ψ, from Reserva Natural da Serra do Itaqui (25°18'25''S; 48°19'44''W), Guaraqueçaba, Paraná, Brazil, IX/2007, E. F. Ramos col. (IBSP 143750); 1Ψ, from Reserva Natural do Rio Cachoeira (25°25'44''S; 48°42'43''W), Antonina, Paraná, Brazil, 24/IX/2005, E. Álvarez col. (MCN 44720); 1Ψ, from Parque Estadual da Serra do Tabuleiro (27°52'14"S; 48°47'10"W), Paulo Lopes, Santa Catarina, Brazil, 10–20/II/2002, Equipe Biota col. (IBSP 143792).

Etymology: The species name is in honor of André Marsola Giroti, for his effort in finding Exocora whenever he is in the field, and is a noun in the genitive.

Diagnosis: Males of Exocora girotii n. sp. are distinguished from those of other species in the genus, except E. ribeiroi n. sp., by the shape of the lamella characteristica, with proximal part globose, and by the short embolic membrane ( Figs 4 A, B). Females are diagnosed by the curved shape of the posterior margin of ventral plate, by the very narrowed dorsal plate and by the shape of the copulatory ducts, long and coiled ( Figs 4 C, D; 15B; 16B). Exocora girotii can be distinguished from E. ribeiroi n. sp. by the twisted distal part of lamella characteristica ( Figs 4 A, B), by its wider atrium ( Figs 4 C; 15B), and by the closer distance between the copulatory ducts ( Figs 4 D; 16B).

Description: Male (Holotype IBSP 161827): Total length 1.52. Carapace 0.76 long, 0.62 wide, yellowish, with dark spots on the lateral. Sternum 0.42 long, 0.44 wide, yellowish with dark margins. Clypeus 0.16 high. Chelicerae promargin with three teeth, retromargin with four teeth. Abdomen pale brown, with many dark marking along the entire surface ( Figs 5 A, B). Eyes diameter and interdistances: AME 0,0 6, ALE 0.09, PME 0.09, PLE 0.09, AME-AME 0.01, PME-PME 0.02, AME-ALE 0.02, PME-PLE 0.04. Eyes grouped, projected above the clypeus, ocular area with few bristles ( Fig. 5 B). Coxa IV separation 1.1 times their width. Femur I/II/ III/IV 0.92/0.86/0.58/0.78; patella I 0.28; tibia I 0.88; metatarsus I 0.96; tarsus I 0.62. Legs yellow with dark spots on each article. Prolateral macroseta, thick and curved, on tibia I ( Fig. 5 C). TmI 0.21. Palpal tibia without apophysis. Protegulum present. Embolic division with small radix. Embolus long, filiform and free, origin from the posterior side of the embolic division, runs to the ectal side curving several times ( Figs 4 A, B).

Female (Paratype IBSP 143792): Total length 1.96. Carapace 0.74 long, 0.56 wide. Sternum 0.42 long, 0.44 wide. Clypeus 0.1 high. Chelicerae promargin with 3 teeth, retromargin with 5 teeth. Body color pattern same as male, but darker and with white spots on the abdomen ( Figs 5 D, E). Eyes diameter and interdistances: AME 0.06, ALE 0.1, PME 0.09, PLE 0.09, AME-AME 0.01, PME-PME 0.02, AME-ALE 0.02, PME-PLE 0.02. Eyes pattern as in male ( Fig. 5 E). Coxa IV separation 1.16 times their width. Femur I/II/III/IV 0.82/0.78/0.6/ 0.78; patella I 0.24; tibia I 0.72; metatarsus I 0.72; tarsus I 0.5. Legs as in male, tibia I prolateral macroseta thinner and straight ( Fig. 5 F). TmI 0.25. Epigynum prominent ( Figs 4 C; 15B). Spermathecae oblong. The long and coiled copulatory ducts originate in the ventral part of the spermathecae. Fertilization ducts mesally oriented, originating from the dorsal part of the spermathecae ( Figs 4 D; 16B).

Variation: Males (n=2): Total length 1.18–1.52; carapace length 0.76–0.78; carapace width 0.62–0.66; femur I length 0.92–0.92. Females (n=7): Total length 1.78–2.16; carapace length 0.72–0.9; carapace width 0.64–0.72; femur I length 0.82–0.94.

Distribution: States of Rio de Janeiro, São Paulo, Paraná, Santa Catarina, in Brazil ( Fig. 17 ).

Material examined (N=9): BRAZIL, Paraná: Antonina, Reserva Natural do Rio Cachoeira, (25°25'44''S; 8°42'43''W), 2Ψ, 13–19/IV/2004, H. Höfer et al. col. ( IBSP 143796; MCN 44720); Guaraqueçaba, Reserva Natural da Serra do Itaqui, (25°18'25''S; 48°19'44''W), 3Ψ, IX/2007, L. Scheuermann et al. col. ( IBSP 143750; IBSP 143799). Santa Catarina: Paulo Lopes, Parque Estadual da Serra do Tabuleiro, (27°52'14"S; 48°47'10"W), 1Ψ, 10–20/II/2002, Equipe Biota col. ( IBSP 143792). Rio de Janeiro: Teresópolis, Parque Nacional da Serra dos Órgãos, (22º24'43''S; 42º57'57''W), 1Ψ, 23/VIII/2001, Equipe Biota col. ( IBSP 132172). São Paulo: Peruíbe, Estação Ecológica da Juréia-Itatins, (24º33'S; 47º13'W), 1ɗ1Ψ, 26/IV–3/V/1999, A. D. Brescovit et al. col. ( IBSP 25251; IBSP 24852).

Figures

FIGURE 4. Exocora girotii n. sp., male palp (A, B), epigynum (C, D): A, retrolateral; B, prolateral; C, ventral; D, dorsal. Scale bars 0.1 mm.

FIGURE 5. Exocora girotii n. sp., male habitus (A, B), male tibia I macroseta (C), female habitus (D, E), female tibia I macroseta (F). A, D, dorsal; B, E, lateral; C, F, dorsal. Scale bars 0.5 mm in C and F; 1 mm in other images.

FIGURE 17. Distribution of the Exocora species described in this paper.