Ctenus malvernensis Petrunkevitch, 1910,

Polotow, Daniele & Brescovit, Antonio D., 2012, An update on tropical Ctenidae from Jamaica (Arachnida: Araneae), Zootaxa 3481, pp. 39-46: 42-43

publication ID

http://doi.org/ 10.5281/zenodo.212918

publication LSID

lsid:zoobank.org:pub:F333972F-6313-4D6A-9C45-2F22DF2A04C7

persistent identifier

http://treatment.plazi.org/id/256ED02A-FFEF-FFD3-9997-24DDC1ACFF40

treatment provided by

Plazi

scientific name

Ctenus malvernensis Petrunkevitch, 1910
status

 

Ctenus malvernensis Petrunkevitch, 1910 

Figs 2 A –DView FIGURES 2 A – D

Ctenus malvernensis Petrunkevitch, 1910: 217  , pl. 22, figs 24–25 (male holotype [ YPM 502044] and female [ YPM 502043] paratype from Malvern, Jamaica, V. 1905, examined).

Additional material examined. JAMAICA. St. Catherine  Parish, Hellshire Hills, S of Spanish Town, (300–500m, dry forest in limestone karst, 17 o 52 ’N, 76 o 58 ’W), 1 male and 1 female, II –III. 1997, B. Wilson col. ( CAS); St. Andrew Parish, Newcastle to Hardwar Gap (18 o 01’N, 76 o 54 ’W), 1160–1280 m, 1 female, 8.IV. 1988, Coyle, Bennet & Robinson col. ( AMNH); Mandeville (18 o 02’N, 77 o 30 ’W), 1 female, IV. 1940, C.E. Pengelley col. ( AMNH); St. Andrew Parish, B.W.I. vicinity of Cinchona (18 o 01’N, 76 o 54 ’W), 1 female, 10.VI. 1948, D.E. Miller col. ( AMNH); Lucea (18 o 27 ’N, 78 o 10 ’W), 1 female, 21.VII. 1960, Vauries col. ( AMNH); Hermitage Reservoir, Saint Andrew (18 o 05’N, 76 o 46 ’W), 1 female, 24.VII. 1960, Vauries col. ( AMNH).

Diagnosis. Males of Ctenus malvernensis  ( Figs 2 A –BView FIGURES 2 A – D) resemble those of C. falconensis  ( Polotow & Brescovit 2012: figs 2 A –B) by the embolus shape, with large base and thin apex, but can be distinguished by the larger median apophysis, laminar retrolateral tibial apophysis, with elongated dorsal part, and absence of tegular projection. Females of Ctenus malvernensis  ( Figs 2 C –DView FIGURES 2 A – D) resemble those of C. falconensis  ( Polotow & Brescovit 2012: fig. 2 C) by the median sector subrectangular posteriorly, but can be distinguished by median sector narrow anteriorly and truncated lateral lobe of lateral sectors ( Figs 2 C –DView FIGURES 2 A – D).

Description. Male (holotype). Colouration: carapace reddish brown, thoracic groove dark brown; legs reddish brown, with ventral faces of coxae and femora lighter; chelicerae reddish brown; endites and labium reddish brown, lighter at tips; sternum reddish brown; abdomen variegated gray, with dorsal anterior light area and two pairs of white spots on ventral abdomen. Total length 17.10. Carapace 9.70 long, 7.90 wide. Clypeus 0.35 high. Eye diameters: AME 0.50, ALE 0.32, PME 0.47, PLE 0.50. Chelicerae with 3 promarginal teeth, median largest; 4 retromarginal subequal teeth and one retromarginal basal small teeth; with intermarginal denticles. Leg measurements: I: femur 11.20 / patella 4.10 / tibia 11.20 / metatarsus 10.90 / tarsus 4.20 / total 41.60; II: 10.40 / 4.30 / 10.40 / 10.10 / 3.80 / 39.00; III: 9.00/ 3.70 / 7.90 / 9.00/ 3.00/ 32.60; IV: 11.40 / 3.80 / 10.50 / 14.20 / 4.30 / 44.20. Leg formula 4123. Leg spination: tibia I and II v 2 - 2 - 2 - 2 - 2, r 1 - 1 -0, p 1 - 1 - 1 -0, III and IV v 2 - 2 - 2, r 1 - 1 -0, p 1 - 1 -0; metatarsus I, II v 2 - 2 - 2, r 1 - 1 -0, p- 1 - 1 -0, III v 2 - 2 - 2, r 1 - 1 - 1, p 1 - 1 - 1, IV v 2 - 1 - 1 - 1-2, r 1 - 1 - 1 - 1, p 1 - 1 - 1; metatarsus IV unmodified. Palp ( Figs 2 A –BView FIGURES 2 A – D): tibia as long as cymbium; retrolateral tibial apophysis positioned at tibial apex; retrolateral tibial apophysis short, laminar retro-prolaterally, divided into truncated ventral area and elongated dorsal area; cymbium elongated, basal projections absent; tegulum not projected; embolus without laminar basal projection; median apophysis cup-shaped bimarginated and large, with convex area visible in ventral view; conductor hyaline and laminar.

Female ( YPM 502043). Colouration as in male, except by the black rings around the eyes. Total length 26.60. Carapace 12.40 long, 9.30 wide. Clypeus 0.55 high. Eye diameters: AME 0.50, ALE 0.37, PME 0.57, PLE 0.50. Chelicerae with 3 promarginal teeth, median largest; 4 retromarginal subequal teeth and one retromarginal basal small teeth; with intermarginal denticles. Leg measurements: I: femur 10.10 / patella 5.10 / tibia 9.90 / metatarsus 8.70 / tarsus 3.00/ total 36.80; II: 10.00/ 4.90 / 8.50 / 8.10 / 2.80 / 34.30; III: 8.70 / 4.40 / 6.90 / 7.50 / 2.40 / 29.90; IV: 10.80 / 4.40 / 9.50 / 12.00/ 3.40 / 40.10. Leg formula 4123. Leg spination: tibia I and II v 2 - 2 - 2 - 2 - 2, r 1 -0-0, p 1 -0-0, III and IV v 2 - 2 - 2, r 1 - 1, p 1 - 1; metatarsus I, II v 2 - 2 - 2, r0, p0, III v 2 - 2 - 2, r 1 - 1 - 1, p 1 - 1 - 1, IV v 2 - 1 - 1 - 1-2, r 1 - 1 - 1, p 1 - 1 - 1. Epigyne ( Figs 2 C –DView FIGURES 2 A – D): median sector subrectangular posteriorly and narrow anteriorly, with two projections; excavated copulatory ducts entrance; lateral lobes truncated. Spermathecae oval, with basal projection; copulatory ducts short and straight, fertilization ducts long, laminar and curved, positioned in ventral area of spermathecae.

Variation. 2 males: total length 12.30–17.10; carapace length 6.70–9.70; femur I 8.20–11.20. 6 females: total length 18.50–26.60; carapace length 9.00– 12.80; femur I 8.20–10.10.

Distribution. Known only from Jamaica ( Fig. 4View FIGURE 4).

YPM

Peabody Museum of Natural History

CAS

California Academy of Sciences

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Ctenidae

Genus

Ctenus

Loc

Ctenus malvernensis Petrunkevitch, 1910

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

Ctenus malvernensis

Petrunkevitch 1910: 217
1910