Exocora

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: 274-275

publication ID

http://dx.doi.org/10.11646/zootaxa.3599.3.4

publication LSID

lsid:zoobank.org:pub:8570920B-EAC4-48A6-A831-6463682B36D1

persistent identifier

http://treatment.plazi.org/id/03C72F26-106D-4144-FF4C-FB9BFE65A265

treatment provided by

Plazi

scientific name

Exocora
status

 

Exocora  una new species

Figs. 13View FIGURE 13 A–D; 14 A–F; 15 F; 16 F; 17

Type: Holotype 1 ɗ, from Reserva Biológica de Una (15 °08' 34 "S; 39 ° 9 ' 22 "W), Una, Bahia, Brazil, 14 /IV/ 1999, A. D. Brescovit et al. col. ( IBSPAbout IBSP 18069). Paratype: 1 Ψ, from Reserva Biológica de Una (15 °08' 34 "S; 39 ° 9 ' 22 "W), Una, Bahia, Brazil, 14 /IV/ 1998, A. D. Brescovit et al. col. ( IBSPAbout IBSP 18059), 1 ɗ 3 Ψ, 15–28 /XI/ 2008, A.D. Brescovit et al. col. ( IBSPAbout IBSP 47600, 47601, 47604); 1 ɗ, from Campus of Michelin (13 ° 43 'S; 39 °08'W), Ituberá, Bahia, Brazil, 15–25 /I/ 2009, C. Leite col. ( IBSPAbout IBSP 143763).

Etymology: The species epithet is a name in apposition taken from the type locality.

Diagnosis: Specimens of Exocora  una n. sp. resemble those of E. medonho  n. sp. and E. nogueirai  n. sp. in the shape of the male palp and the epigynum. It differs from E. nogueirai  n. sp. e E. medonho  n. sp. by the size of the embolic membrane, very short in E. una n. sp. ( Figs 13View FIGURE 13 A, B), and by the shape of the dorsal plate and the atrium in the epigynum, much smaller in E. una n. sp. ( Figs 13View FIGURE 13 C, D; 15 F; 16 F).

Description: Male (Holotype IBSPAbout IBSP 18069): Total length 1.36. Carapace 0.66 long, 0.56 wide, yellowish, with small lateral dark markings. Sternum 0.34 long, 0.4 wide, yellowish, with dark margin, shows a dark spot in the center. Clypeus 0.06 high. Chelicerae promargin with 2 teeth, retromargin with 3 teeth. Abdomen pale brown, with some dark markings, mainly near the spinnerets, and white spots on the abdomen ( Figs 14View FIGURE 14 A, B). Eyes diameter and interdistances: AME 0.06, ALE 0.08, PME 0.07, PLE 0.08, AME-AME 0.01, PME-PME 0.04, AME-ALE 0.01, PME-PLE 0.02. Eyes projected above the clypeus, ocular area with bristles ( Fig. 14View FIGURE 14 B). Coxa IV separation 1.4 times their width. Femur I/II/III/IV 0.8 / 0.76 / 0.52 / 0.66; patella I 0.22; tibia I 0.76; metatarsus I 0.76; tarsus I 0.48. Legs yellowish, with dark markings in each article. Tibia I has a thick prolateral macroseta ( Fig. 14View FIGURE 14 C). TmI 0.18. Palpal tibia without apophysis. Protegulum present, small. Embolus long, originates in the posterior part of the embolic division, runs to the ectal side and oriented anteriorly, getting into the lamella characteristica. Embolic membrane short, projects anteriorly ( Figs 13View FIGURE 13 A, B).

Female (Paratype IBSPAbout IBSP 47601): Total length 1.9. Carapace 0.72 long, 0.6 wide. Sternum 0.4 long, 0.42 wide. Clypeus 0.08 high. Chelicerae promargin with 3 teeth, retromargin with 5 teeth. Color pattern as in male. Female has a dark spot on the carapace covering the dorsal part and abdomen with white spots in the dorsal side ( Figs 14View FIGURE 14 D, E). Eyes diameter and interdistances: AME 0.07, ALE 0.08, PME 0.08, PLE 0.08, AME-AME 0.01, PME-PME 0.05, AME-ALE 0.02, PME-PLE 0.02. Eyes pattern as in male, ocular area with poor bristles ( Fig. 14View FIGURE 14 E). Coxa IV separation 1.5 times their width. Leg formula I-II-IV-III. Femur I/II/III/IV 0.82 / 0.8 / 0.62 / 0.78; patella I 0.24; tibia I 0.76; metatarsus I 0.78; tarsus I 0.48. Legs as in male. Tibia I prolateral macroseta less developed ( Fig. 14View FIGURE 14 F). TmI 0.18. Dorsal tibial macrosetae 2 - 2 - 2 - 2. TmIV absent. Epigynum prominent, with a single atrium ( Figs 13View FIGURE 13 C; 15 F). Spermathecae rounded. Copulatory duct originating from the posterior part of spermatheca, presents only one turning in the ventral direction. Copulatory openings in the mesal part. Fertilization duct originating from the posterior side of the spermatheca is oriented mesally ( Figs 13View FIGURE 13 D; 16 F).

Variation: Males (n= 3): Total length 1.38 – 1.38; carapace length 0.62–0.68; carapace width 0.52–0.58; femur I length 0.76–0.78. Females (n= 10): Total length 1.48–1.86; carapace length 0.64–0.76; carapace width 0.52–0.64; femur I length 0.7–0.88.

Distribution: Known only for Ituberá e Una, Bahia, Brasil ( Fig. 17View FIGURE 17).

Material examined (N= 19): BRAZIL, Bahia: Una, Reserva Biológica de Una (15 °08' 34 "S; 39 ° 9 ' 22 "W), 2 ɗ 17 Ψ, 15-28 /XI/ 2008, A. D. Brescovit et al. col. ( IBSPAbout IBSP 18069; IBSPAbout IBSP 18150; 18197, 18333, 18386, 47599, 47602 –47603, 47605– 47609).

IBSP

Instituto Biologico de Sao Paulo