Piloctenus pilosus, (THORELL, 1899), 2017

PILOCTENUS PILOSUS ( THORELL, 1899) View in CoL ( FIGS 39A – D View Figure 39 , 40A – C, 41A – D)

Literature (WSC, 2015)

Ctenus pilosus Thorell (1899: 78 View in CoL , Dmf), Arts (1912: 208, pl. 3, fig. 37, mf), Hyatt (1954: 885, figs 9 – 12, 23, mf), Benoit (1979: 568, figs 1A, B, mf, S, rejected); C. observandus Arts (1912: 210, pl. 3, fig. 43, Dm); C. cavaticus minor de Lessert (1929: 144 View in CoL , fig. 24, Dmf).

Remark

As ‘ Ctenus ’ pilosus Thorell, 1899 is now transferred in Piloctenus , a replacement name for Ctenus pilosus Franganillo, 1930 is no longer needed [(WSC) World Spider Catalog, 2015].

Type material

Male lectotype , here designated: Cameroon ( NHRS 5195 View Materials ); female paralectotype , together with lectotype.

Diagnosis

Males of Piloctenus pilosus are recognized by the palp ( Figs 40A, B, 41A – C) with short dorsal, pointed extension near base of the cymbium and with erect RTA, ending in a narrow, sharp process pointing forward and slightly downward. Females resemble those of C. mirificus Arts, 1912 by the shape of the epigyne, but can be distinguished by the narrower MS ( Figs 40C, 41D).

Remark

The lectotype is faded; the colour description is based on the male and female deposited in NHRS 5195 View Materials .

Description

Male (lectotype). Total length 13.8. Carapace 6.7 long and 5.3 wide. Clypeus 0.12 high. Eye diameters: AME 0.36, ALE 0.16, PME 0.36, PLE 0.31. Coloration ( Figs 39C, D View Figure 39 ): carapace brownish yellow with faint radiating striae; legs uniform pale yellow; chelicerae, endites and labium yellow; sternum pale yellow; abdomen pale yellow with lighter median stripe in anterior half, with four apodemes; venter pale. Chelicerae with three promarginal teeth, median larger; four retromarginal teeth, basal smallest; without intermarginal denticles. Leg measurements: I: femur 7.74/ patella 2.84/ tibia 8.38/ metatarsus 7.37/ tarsus 2.27/ total 28.90; II: 7.10/ 2.49/ 7.81/7.24/ 2.27/ 26.91; III: 6.18/ 2.41/ 5.11/ 6.11/ 1.56/ 21.37; IV: 7.24/ 2.41/ 6.75/ 9.37/ 2.49/ 28.62. Leg formula 1423. Leg spination: femur I pl1 d1-1-1 rl1-1-1, II pl1-1-1 d1-1-1 rl1- 1-1-1, III pl1-1-1-1 d1-1-1 rl1-1-1, IV pl1-1-1-1 d1-1-1 rl1-1-1; patella I pl1 d1 rl1, II pl1 rl1, III pl1 rl1, IV pl1 rl1; tibia I v2-2-2-2-2 pl1 d1-1 rl1, II v2-2-2-2-2 pl1-1 rl1, III v2-2-2 pl1-1 d1-1-1 rl1-1; III v2-2-2 pl1- 1 d1-1-1 rl1-1, IV v2-2-2-2 pl1-1 d1-1-1 rl1-1, metatarsus I v2-2-2-1 pl1-1 rl1-1 II v1-2-1-1 pl1-1-1 rl1-1-1, III v2-2-2 pl1-1-1 d1 rl1-1-1, IV v2-2-1-2 pl1- 1-1 rl1-1-1; Mt IV unmodified. Palp ( Figs 40A, B, 41A – C): tibia distally with short, round ventral process; RTA at about 1/3 from distal margin, bifid, inferior prong fairly broad, blade-shaped with short tapered tip, superior prong tooth-like; cymbium distally with long pilosity, with short dorsal extension near base with tip pointing upward; embolus broad, slightly curved, central part of tegulum strongly bulging; sperm duct running along tegular margin. MA spoon-shaped with distal margin strongly recurved.

Female (paralectotype, together with lectotype). Total length 9.2. Carapace 4.8 long and 4.4 wide. Clypeus 0.13 high. Eye diameters: AME 0.26, ALE 0.18, PME 0.30, PLE 0.33. Coloration ( Fig. 39A, B View Figure 39 ) as in male but chelicerae reddish brown. Chelicerae with three promarginal teeth, median larger; four retromarginal teeth, basal small, without intermarginal denticles. Leg measurements: 4.40/ patella 1.99/ tibia 4.83/ metatarsus 3.83/ tarsus 1.42/ total 16.47; II: 4.33/ 1.85/ 3.46/ 3.69/ 1.21/ 14.77; III: 3.69/ 1.78/ 2.63/ 3.48/ 1.44/ 13.02; IV: 5.04/ 2.06/ 3.69/ 6.04/ 1.56/ 18.39. Leg formula 4123. Leg spination: femur I pl1 d1-1-1 rl1-1, II pl1-1 d1-1-1 rl1-1-1, III pl1-1-1-1 d1-1-1 rl1-1-1, IV pl1-1-1 d1-1-1 rl1; patella I, II none, III pl1, IV pl1 rl1; tibia I v2-2-2-2-2, II v2-2-2- 2-2 pl1d1, III v2-2-2-2-2 pl1-1 rl1-1 d1-1-1, IV v2-2-2- 2-2 pl1-1 rl1-1 d1-1-1; metatarsus I v2-2-1-2, II v2-2- 2, III v2-2-2 pl1-1-1 rl1-1-1, IV v2-2-2 pl1-1-1 rl1-1-1; Mt IV unmodified. Epigyne ( Figs 40C, 41D): MS subrectangular, longer than wide, widest in posterior half, lateral sides slightly sinuous, posterior half with transverse groove; LP curved inward, surpassing rounded posterior rim of MS.

Distribution

Only known from Cameroon.