Ctenus falconensis Schenkel, 1953,

Polotow, Daniele & Brescovit, Antonio D., 2012, Redescription of five Amazonian species of Ctenus Walckenaer (Araneae, Ctenidae, Cteninae), Zootaxa 3338, pp. 49-59: 51-52

publication ID

http://doi.org/ 10.5281/zenodo.281372

persistent identifier

http://treatment.plazi.org/id/03CCF52F-0153-FFF3-89B4-F8D02B63FB4B

treatment provided by

Plazi

scientific name

Ctenus falconensis Schenkel, 1953
status

 

Ctenus falconensis Schenkel, 1953 

Figs 2View FIGURE 2 A –C

Ctenus falconensis Schenkel, 1953: 36  , figs 32 a –c (male holotype and female paratype from El Pozon, 10 ° 58 'N, 68 ° 43 'W, Departamento Acosta, Falcon, Venezuela, XI –XII. 1924, Wiedenmeyer col., deposited in NHMB, examined).

Note. The dissection epigynum of the female paratype was not allowed and therefore we were not able to examine the female internal genitalia of this specimen. The tibia, metatarsus and tarsus of leg IV of the male holotype were detached from the body and mixed with the detached and broken female legs; it was thus impossible to distinguish male and female legs, however, we can confirm that leg IV of the male specimen was unmodified.

Diagnosis. Males of Ctenus falconensis  resemble those of Ctenus paubrasil  ( Brescovit & Simó 2007: figs 31–32) by the shape of the laminar basal projection of the embolus, but can be distinguished by the prolaterally pointed tegular projection, the short and ventrally pointed retrolateral tibial apophysis and an additional basal projection of the retrolateral tibial apophysis ( Figs 2View FIGURE 2 A –B). Females of C. falconensis  resemble those of Ctenus amphora  ( Höfer et al. 1994: figs 1 c –d) by the subrectangular epigynal median sector, but can be distinguished by the oblique ovoid lobes and by the shape of the ovoid projection ( Fig. 2View FIGURE 2 C).

Description. Male (holotype). Colouration: the holotype is faded. Total length 12.70. Carapace 7.20 long and 5.70 wide. Clypeus 0.16 high. Eye diameters: AME 0.35, ALE 0.25, PME 0.50, PLE 0.52. Chelicerae with 3 promarginal teeth, median larger; 4 retromarginal teeth, basal small; with intermarginal denticles. Leg measurements: I: femur 8.20 / patella 3.50 / tibia 8.00/ metatarsus 7.50 / tarsus 2.40 / total 29.60; II: 7.80 / 3.50 / 7.00/ 7.00/ 2.20 / 27.50; III: 6.70 / 2.80 / 5.30 / 6.20 / 1.80 / 22.80; IV: 8.50 / 3.10 / -/ -/ -/ -. Leg formula 4123. Leg spination: tibia I v 2 - 2 - 2 - 2 - 2, r 0-1 -0, p0, II v 2 - 2 - 2 - 2 - 2, r 0-1 -0, p 1 - 1 -0, III v 2 - 2 - 2, r 1 - 1 -0, p 1 - 1 -0; metatarsus I v 2 - 2 - 2, r 1 - 0-1, p0, II v 2 - 2 - 2, r 1 - 0-1, p- 1 -0-0, III v 2 - 2 - 2, r 1 - 1 - 1, p 1 - 1 - 1; metatarsus IV unmodified. Palp: tibia as long as cymbium; RTA on apical part of tibia, short and broad, pointed ventrally ( Fig. 2View FIGURE 2 B); cymbium elongate, without basal projections; tegulum projecting prolaterally; embolus with large base, short tip and retrolateral apical process; embolus with laminar basal projection; median apophysis cup-shaped bimarginate, short; conductor hyaline, laminar, fixed to tegulum in median area, C-shaped in retrolateral view ( Figs 2View FIGURE 2 A –B).

Female (paratype). Colouration: the paratype is faded. Total length 11.30. Carapace 4.80 long and 3.70 wide. Clypeus 0.17 high. Eye diameters: AME 0.22, ALE 0.12, PME 0.34, PLE 0.34. Chelicerae with 3 promarginal teeth, median larger; 4 retromarginal teeth, basal small; with intermarginal denticles. Leg measurements, formula and spination: all legs are detached and broken. Epigynum: median sector subrectangular, projected anteriorly; with two projected oblique ovoid lobes; entrance of copulatory ducts as projected lobes; lateral spurs originating medially in lateral sector ( Fig. 2View FIGURE 2 C).

Additional material examined. None

Distribution. Known only from the type locality, north of Venezuela ( Fig. 7View FIGURE 7).

NHMB

Naturhistorisches Museum, Basel

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Ctenidae

Genus

Ctenus

Loc

Ctenus falconensis Schenkel, 1953

Polotow, Daniele & Brescovit, Antonio D. 2012
2012
Loc

Ctenus falconensis

Schenkel 1953: 36
1953