Ctenus delesserti ( Caporiacco, 1947 )

Polotow, Daniele & Brescovit, Antonio D., 2012, Redescription of five Amazonian species of Ctenus Walckenaer (Araneae, Ctenidae, Cteninae), Zootaxa 3338, pp. 49-59 : 50-51

Ctenus delesserti ( Caporiacco, 1947)

Figs 1 A–B

Celaetycheus delesserti Caporiacco, 1947: 28 ( female holotype and an immature paratype from Webecari Mission , 6° 31'N, 58° 19'W, Essequibo Islands, West Demerara Region , Guyana, 3.IV.1936 , and an immature paratype from Waratilla Creek, 6° 31'N, 58° 19'W, Essequibo Islands, West Demerara Region , Guyana, 29.V.1936, deposited in MZS, examined) ; Caporiacco 1948: 681; Polotow & Brescovit 2009b: 16.

Ctenus delesserti: Polotow & Brescovit 2009b: 16 .

Diagnosis. Females of C. delesserti resemble those of C. dubius ( Brescovit & Simó 2007: fig. 5) by the shape of the epigynal median sector, but can be distinguished by the processes of the lateral sector, which are broad and flattened ( Fig. 1 A).

Description. Male. Unknown.

Female (holotype). Colouration: Carapace brown, pars thoracica pale brown, thoracic groove dark brown; black rings around eyes; chelicerae reddish brown; endites and labium reddish brown, lighter at tips; legs pale brown, with ventral faces of coxae and femora yellow; sternum yellow; abdomen light brown, with yellow anterior dorsal area; ventral abdomen yellow. Total length 7.10. Carapace 3.60 long and 3.00 wide. Clypeus 0.16. Eye diameters: AME 0.25, ALE 0.18, PME 0.30, PLE 0.32. Chelicerae with 3 promarginal teeth, median larger; 4 retromarginal teeth, basal small; with intermarginal denticles. Leg measurements: I: femur 6.00/ patella 3.20/ tibia 5.40/ metatarsus 5.00/ tarsus 1.60/ total 21.20; II: 5.80/ 3.10/ 5.00/ 4.70/ 1.40/ 20.00; III: 5.20/ 2.40/ 4.10/ 4.70/ 1.70/ 18.10; IV: 6.80/ 2.50/ 6.30/ 7.80/ 2.80/ 26.20. Leg formula 4123. Leg spination: tibia I and II v2-2 -2-2-2, r0, p0, III and IV v2-2 -2, r1-1, p1-1; metatarsus I, II v2-2 -2, r0, p0, III, IV v2-2 -2, r1-1-1, p1-1-1. Epigynum: median sector oval; with two ovoid lobes positioned longitudinally; median sector with swollen posterior area; ovoid projection under ovoid lobes; lateral spurs laminar, originating medially in lateral sector ( Fig. 1 A); spermathecae with round apical part and elongated proximal area; copulatory ducts short and curved; fertilization ducts short, originating from retrolateral side of spermathecae ( Fig. 1 B).

Additional material examined. None.

Distribution. Essequibo Islands, West Demerara Region, Guyana ( Fig. 7 ).

Figures

FIGURE 1. Ctenus delesserti (holotype), female genitalia. A. Epigynum, ventral view; B. Vulva, dorsal view. Scale bar: 0.50 mm. Abbreviations: CD, copulatory ducts; FD, fertilization ducts; LL, lateral lobes; LS, lateral sectors; MS, median sector; OL, ovoid lobes; OP, ovoid projection; S, spermathecae.

FIGURE 7. Collection localities of five Ctenus species. A. South America; B. Close up, northeastern South America. Legend: square = C. delesserti; black circle = C. falconensis and C. sigma; gray circle = C. nigritus; triangle = C. serratipes.