Dossenus paraensis, Cruz, Estevam L., Silva, Da & Lise, Arno A., 2011

Cruz, Estevam L., Silva, Da & Lise, Arno A., 2011, A new species of Dossenus Simon, 1898 (Araneae, Trechaleidae) from Northern Brazil, Zootaxa 2814, pp. 67-68 : 67-68

Dossenus paraensis new species

Figs. 1, 2

Type material: Holotype: female from Pará, Brazil [06°09’42.49”S, 52°42’10.07’W], XI.1945, C. D. Michener ( MCTP 8865).

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

Diagnosis. The female of D. paraensis sp. n. can be distinguished from those of D. marginatus Simon, 1898 and D. guapore ( Silva et al. 2007, pp. 142, 148, figs. 7, 8, 31, 32) by the presence of a short median projection on the scape of the epigynum ( Fig. 1 ). This new species has only four pairs of ventral macrosetae on tibia I and II, differing from D. marginatus and D. guapore , which has five pairs.

Description. Female (Holotype, MCTP 8865). Total length 8.05. Carapace 4.06 long, 3.15 wide, light yellow with a median light brown band surrounded by a white line extending to the abdomen, darker laterally. Clypeus light yellow, 0.26 high. Anterior eye row slightly recurved, 0.80 wide; posterior 1.60 wide. Eye diameters, interdistances, and median ocular quadrangle: AME 0.14, ALE 0.12, PME 0.30, PLE 0.22; AME-AME 0.14, AME-ALE 0.10, PME-PME 0.30, PME-PLE 0.40, OQA 0.40, OQP 0.82, OQH 0.68. Chelicerae light brown, bristly; promargin and retromargin of fang furrow with three teeth equidistant and equal in size. Sternum light yellow with scattered setae; 2.07 long, 1.66 wide. Labium yellow, 0.33 long, 0.48 wide. Legs yellow, relative length: IV-I-II-III, I – femur 4.31/ tibia-patella 5.39/ metatarsus 4.31/ tarsus 2.07/ total 16.08; II – 4.23/ 5.47/ 3.65/ 1.90/ 15.25; III – 3.32/ 3.73/ 2.24/ 1.41/ 10.70; IV – 4.73/ 5.56/ 4.56/ 2.10/ 16.95. Ventral pairs of macrosetae on tibiae: I-4; II-4; III-3; IV-3. Abdomen, 3.98 long, light brown, with dark brown setae on anterior portion; dorsum with a median light brown band. Venter light gray, with scattered setae. Epigynum with prominent scape, presenting a short projection on the anterior margin ( Fig. 1 ). Stalk of spermathecae (SS) elongated and head of spermathecae (HS) elliptical ( Fig. 2 ).

Male. Unknown.

Distribution. Known only from the type locality.

Figures

FIGURES 1, 2. Dossenus paraensis sp. n. female genitalia (1 epigynum, ventral view, 2 internal genitalia, dorsal view). (HS = head of spermathecae; SS = stalk of spermathecae).