Enna segredo, Cruz, Estevam L., Silva, Da & Lise, Arno A., 2009

Cruz, Estevam L., Silva, Da & Lise, Arno A., 2009, Four new species of the Neotropical spider genus Enna (Araneae, Lycosoidea, Trechaleidae) from Brazil, Zootaxa 2289, pp. 48-54 : 49-50

Enna segredo new species

Figs. 2 , 8–10

Type material: Holotype: female from Usina Hidrelétrica de Segredo (Reservatório do rio Jordão/Candói/ Mangueirinha), Paraná, Brazil [23° 46’S, 46° 18’W], IV.1996, R. Bertani ( IBSP 11678).

Paratypes: 2Ƥ, same data as holotype ( IBSP 11650, 11169).

Etymology. The specific name is a noun in apposition referring to the type locality.

Diagnosis. The female of E. segredo sp. n. is similar to the one of E. estebanensis (Simon, 1898) ( Silva et al., 2008, p. 92, figs. 68–70) by the shape of the anterior margin of the middle field of epigynum ( Fig. 8 ), but can be distinguished by an elevation on the central area of middle field (MF) ( Figs. 8, 9 ) and by the prominent median septum (MS) ( Fig. 10 ).

Description. Female (Holotype, IBSP 11678). Total length 9.70. Carapace 4.92 long, 4.38 wide, dark brown, with three light brown one median and lateral stripes, darker laterally ( Fig. 2 ). Clypeus light brown, bristly, 0.40 high. Anterior eye row straight, 1.04 wide; posterior 2.03 wide, recurved. Eye diameters, interdistances, and median ocular quadrangle: AME 0.16, ALE 0.14, PME 0.22, PLE 0.26; AME-AME 0.20, AME-ALE 0.10, PME-PME 0.50, PME-PLE 0.42, OQA 0.48, OQP 0.99, OQH 0.63. Chelicerae dark brown, bristly; promargin and retromargin of fang furrow with three teeth equidistant and equal in size. Sternum yellowish, bristly; 4.39 long, 4.89 wide. Labium dark brown, lighter posteriorly, 1.99 long, 1.90 wide. Legs brownish with light brown annuli on femora, relative length: IV-I-II-III, I – femur 4.23/ tibia-patella 5.56/ metatarsus 3.73/ tarsus 1.82/ total 15.34; II – 4.31/ 5.47/ 3.57/ 1.74/ 15.09; III – 3.48/ 4.15/ 3.90/ 1.41/ 12.94; IV – 4.33/ 5.22/ 3.98/ 1.90/ 15.43. Ventral pairs of macrosetae on tibiae: I-4; II-4; III-3; IV-3. Abdomen, 4.78 long, grayish, bristly ( Fig. 2 ). Venter grayish, with scattered setae. Middle field of epigynum elevated and scape slightly projected ( Figs. 8, 9 ); spermathecae short and elliptical with long copulatory duct (CD) ( Fig. 10 ).

Distribution. Known only from the type locality.

Figures

FIGURES 1 – 4. Enna spp., female habitus, dorsal view. 1. Enna trivittata sp. n. 2. E. segredo sp. n. 3. E. meridionalis sp. n. 4. E. caparao sp. n.

FIGURES 5 – 16. 5 – 7. Enna trivittata sp. n., female epigynum (5 ventral, 6 posterior, 7 dorsal). 8 – 10. E. segredo sp. n., female epigynum (8 ventral, 9 posterior, 10 dorsal). 11 – 13. E. meridionalis sp. n., female epigynum (11 ventral, 12 posterior, 13 dorsal). 14 – 16. E. caparao sp. n., female epigynum (14 ventral, 15 posterior, 16 dorsal). (AS = accessory spermathecae; CD = copulatory duct; FD = fertilization duct; HS = head of spermathecae, MF = middle field of epigynum; S = spermathecae, SC = scape).