Enna trivittata, 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

Enna trivittata new species

Figs. 1 , 5–7

Type material: Holotype: female from São Pedro, Fazenda Santa Maria do Meio, São Paulo, Brazil [22°33’S, 47°57’W], 29.V.2001, R. M. C. Castro ( IBSP 57336).

Etymology. The specific name is an adjective referring to the three whitish longitudinal stripes on the dorsum of abdomen ( Fig. 1 ).

Diagnosis. The female of E. trivittata sp. n. resembles E. maya Silva, Lise & Carico, 2008 (p. 87, fig. 39) by the shape of the epigynal middle field ( Fig. 5 ), but can be distinguished by a projected scape ( Fig. 6 ) and the presence of well defined accessory spermathecae ( Fig. 7 ).

Description. Female (Holotype, IBSP 57336). Total length 9.84. Carapace, 4.38 long, 3.72 wide, light brown ( Fig. 1 ). Clypeus dark brown, bristly, 0.31 high. Anterior eye row straight, 1.00 wide; posterior 1.84 wide, recurved. Eye diameters, interdistances, and median ocular quadrangle: AME 0.20, ALE 0.16, PME 0.24, PLE 0.30; AME-AME 0.16, AME-ALE 0.10, PME-PME 0.52, PME-PLE 0.38, OQA 0.58, OQP 1.06, OQH 0.66. Chelicerae red-brownish, bristly; promargin and retromargin of fang furrow with three teeth equidistant and equal in size. Sternum yellowish, bristly, 1.70 long, 1.86 wide. Labium dark brown, 0.65 long, 0.74 wide. Legs light brown with dark brown annuli on femora, relative length: IV-I-II-III, I – femur 4.06/ tibia-patella 5.81/ metatarsus 3.82/ tarsus 1.74/ total 15.43; II – 4.31/ 5.47/ 3.65/ 1.66/ 15.09; III – 3.56/ 4.31/ 3.07/ 1.49/ 12.43; IV – 4.15/ 5.39/ 4.56/ 1.82/ 15.92. Ventral pairs of macrosetae on tibiae: I-4; II-4; III-3; IV- 3. Abdomen, 5.32 long, grayish, with scattered setae, dorsum with three whitish longitudinal stripes ( Fig. 1 ). Venter whitish. Middle field of epigynum with two small excavations ( Fig. 5 ), scape slightly projected ( Fig. 6 ); spermathecae rounded at apex with small accessory spermathecae ( Fig. 7 ).

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).