Enna meridionalis, 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 : 50

Enna meridionalis new species

Figs. 3 , 11–13

Type material: Holotype: female from Cruzeiro do Iguaçu, Dois Vizinhos, Foz do rio Chopim, Paraná, Brazil [25° 37’S, 53°08’W], 08–15.X.1998, Equipe IBSP ( IBSP 21155). Paratype: one female, same data as holotype ( IBSP 21045).

Etymology. The specific name is a noun and means “from South”, referring to the type locality in southern Brazil.

Diagnosis. The female of E. meridionalis sp. n. is similar to E. hara Silva, Lise & Carico, 2008 (p. 93, figs. 74–76) by the general shape and by the small sulci on the middle field of epigynum ( Figs. 11, 12 ), but can be distinguished by the short and round head of spermathecae ( Fig. 13 ).

Description. Female (Holotype, IBSP 21155). Total length 6.64. Carapace, 2.57 long, 2.32 wide, dark brown, with a light brown median band ( Fig. 3 ). Clypeus light brown, 0.26 high. Anterior eye row straight, 0.74 wide; posterior 1.42 wide, recurved. Eye diameters, interdistances, and median ocular quadrangle: AME 0.14, ALE 0.12, PME 0.20, PLE 0.31; AME-AME 0.14, AME-ALE 0.05, PME-PME 0.36, PME-PLE 0.22, OQA 0.42, OQP 0.82, OQH 0.50. Chelicerae red-brownish, bristly; promargin and retromargin of fang furrow with three teeth equidistant and equal in size. Sternum yellowish, bristly; 2.98 long, 1.57 wide. Labium yellowish, 0.99 long, 1.23 wide. Legs brownish with dark brown spots, relative length: IV-I-II-III, I – femur 2.40/ tibia-patella 3.90/ metatarsus 2.49/ tarsus 1.24/ total 10.03; II – 2.82/ 3.56/ 2.45/ 1.16/ 9.99; III – 1.83/ 2.57/ 2.15/ 1.07/ 7.62; IV – 2.83/ 3.48/ 3.32/ 1.18/ 10.81. Ventral pairs of macrosetae on tibiae: I-4; II-4; III-3; IV-3. Abdomen, 3.81 long, grayish, with scattered setae and sparse small light dots ( Fig. 3 ). Venter whitish, with scattered setae. Middle field of epigynum with a small median excavation ( Fig. 11, 12 ), scape slightly projected ( Fig. 12 ); spermathecae rounded at apex ( Fig. 13 ).

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).