Enna silvae, Cruz, Estevam L., Silva, Da & Lise, Arno A., 2011

Cruz, Estevam L., Silva, Da & Lise, Arno A., 2011, Seven new species of Enna (Araneae: Trechaleidae) from Central and South America, Zootaxa 2919, pp. 60-68 : 65

Enna silvae new species

Figs 12, 13

Type. Female holotype from Madre de Dios, 15 km E from Puerto Maldonado, Peru [11°45’33.54”S, 70°48’52.44’W], 17.VII.1989, D. Silva ( MUSM). Paratypes: two females, same locality and data as holotype ( MUSM, MCTP 8868)

Etymology. The specific name is a matronym in honor of the collector of the types, Diana Silva.

Diagnosis. The females of E. silvae sp. nov. resembles those of E. hara Silva, Lise & Carico, 2008 by the shape of the middle field of the epigynum (MF) ( Silva et al. 2008, p. 94, fig. 76), but can be distinguished by smooth median area of the middle field of the epigynum (MF) ( Fig. 12 ) and by the rounded head of spermathecae ( Fig. 13 ).

Description. Female (Holotype, Madre de Dios, Peru, MUSM). Total length 4.81. Carapace 2.24 long, 2.07 wide, dark brown with a median light brown band. Clypeus dark brown, 0.18 high. Anterior eye row slightly recurved, 0.60 wide; posterior 1.24 wide. Eye diameters, interdistances, and median ocular quadrangle: AME 0.12, ALE 0.08, PME 0.18, PLE 0.20; AME-AME 0.10, AME-ALE 0.02, PME-PME 0.30, PME-PLE 0.16, OQA 0.36, OQP 0.72, OQH 0.44. Chelicerae dark brown, bristly; promargin and retromargin of fang furrow with three teeth equidistant and equal in size. Sternum light brown, with dark brown patches laterally; scattered setae; 0.99 long, 0.91 wide. Labium dark brown, lighter distally, 0.33 long, 0.41 wide. Legs light brown with dark brown annuli on femora, relative length: IV-I-II-III. Leg measurements: I—femur 2.49/ tibia-patella 3.32/ metatarsus 2.40/ tarsus 0.99/ total 9.20; II—2.24/ 3.40/ 2.24/ 0.91/ 8.79; III—1.99/ 2.33/ 1.90/ 0.83/ 7.05; IV—2.40/ 2.98/ 2.90/ 1.03/ 9.31. Ventral pairs of macrosetae on tibiae: I-4; II-4; III-3; IV-3. Abdomen 2.49 long, dark gray, with several irregular white patches on dorsum. Venter grayish, with scattered setae. Middle field of the epigynum (MF) smooth and not projected ( Fig. 12 ). Head of spermathecae rounded and with inconspicuous fertilization ducts (FD) ( Fig. 13 ).

Distribution. Known only from the type locality (Madre de Dios, Peru).

Male. Unknown.

Figures

FIGURES 12 – 17. Enna silvae sp. nov. 12, 13. female epigynum (12 ventral, 13 dorsal). Enna frijoles sp. nov. 14, 15. female epigynum (14 ventral, 15 dorsal). Enna zurqui sp. nov. 16, 17. female epigynum (16 ventral, 17 dorsal). (CO, copulatory openings; HS, head of spermathecae).