Cytaea fibula Berland, 1938

Patoleta, Barbara M. & Trębicki, Łukasz, 2015, Redescription of some poorly known species of Cytaea Keyserling, 1882 (Araneae: Salticidae), with new synonymies, Zootaxa 3949 (4), pp. 555-566 : 557

Cytaea fibula Berland, 1938

Figs 18–33

Cytaea fibula Berland, 1938: 157 –159, figs 81–84 (male holotype not located, probably lost; specimens studied were recognized as paratypes: Vanuatu: 1♀ from Malekula, Aubert de la Rue, 1934; 4♀, 3juv. from Efate, Port Vila, Risbec 1935 ; 1♀ from Efate Port Vila, Risbec , June 1933; 1♀ from Epi, Aubert de la Rue, October 1935; 2♀ from Santo, Port Vila, Miss Cheesman, 18 November 1933; 1♀ from Epi, sommet Alempse, 513m, 1935; all deposited in MNHN, examined); World Spider Catalog 2015.

Additional material examined. 1♂, 1♀, Vanuatu, Mali Kula, J.J. Walker, 1901, AMS, KS21721. Although the specimen does not belong to the type series, it was collected from the type locality.

Diagnosis. Embolus is the longest among known Cytaea species, forming three and a half coils, arising at 3 o'clock ( Figs 20, 25 ). Epigyne has also the longest ducts within the genus ( Figs 31–33 ).

Redescription. Male (AMS, KS21721). Cephalothorax orange, covered with brown and white scales ( Figs. 18, 22 ). Eyes surroundings dark brown. Eye field wider than long, narrowing posteriorly (its length 42% of CL). PME halfway between PLE and ALE. Fovea short, located between PLE. Clypeus light-orange, narrower (14%) than AME diameter ( Fig. 24 ), covered with long whitish hairs. Chelicerae vertical, light-orange, elongate. Promargin with four teeth, retromarginal tooth bicuspidate ( Fig. 23 ). Endites and labium slender, not distinctive, pale-yellow, with lighter chewing margins. Sternum longer than wide, pale ( Fig. 19 ). Abdomen elongate, pale, with darker wide longitudinal median stripe; covered with sparse brown hairs and light-brown scales ( Fig. 18 ). Spinnerets pale-yellow. Venter yellowish. Pedipalps light-brown, femur with 1-1-3 dorsal spines, RTA of medium length, wider at the base, convolute, hooked apically, with distal notch ( Figs 20–21, 25–26 ). Legs I pale-orange, coxae–patellae ventrally slightly lighter; spination: fI: dorsal 1-1-5; pI: prolateral 1, retrolateral 1; tI: dorsal 1-1, prolateral 1-1, retrolateral 1-1, ventral 2-2-2; mI: prolateral 1-1, retrolateral 1-1, ventral 2-2. Other legs yellowish, lighter ventrally, with numerous spines. Leg formula: III-IV-I-II. Dimensions. CL 3.88, CW 2.95, CH 2.58, AL 4.26, AW 2.12, EFL 1.65 AEW 2.75, PEW 2.52, leg I: 6.01 (1.66 + 1.23 + 1.41 + 1.17 + 0.54), leg II: 5.47 (1.58 + 1.11 + 1.20 + 1.06 + 0.52), leg III: 6.39 (2.05 + 1.14 + 1.13 + 1.50 + 0.57), leg IV: 6.36 (1.84 + 0.90 + 1.41 + 1.68 + 0.53).

Female (paratype from Malekula). Cephalothorax pale-orange, covered with sparse white scales, more numerous on the sides ( Fig. 27 ). Eye surroundings black. Eye field wider than long, its length 46% of CL. PME halfway between PLE and ALE. Thorax with indistinct lines radiating from fovea, the latter between PLE. Abdomen elongate, yellowish, covered with sparse brown hairs and orange scales. Spinnerets pale-yellow. Clypeus pale, much narrower (6%) than AME diameter, covered with long, white hairs. Chelicerae grey-orange, massive, elongate, inclined forwards, promargin with three teeth, retromargin with bicuspidate tooth ( Fig. 30 ). Endites and labium pale, with lighter chewing margins, sternum whitish. Venter marble-yellowish, with two longitudinal stripes of darker dots ( Fig. 28 ). Legs light-brown, dorsal parts, and distal tibiae and patellae lighter. Leg I spination: fI: dorsal 1-1-5; pI: prolateral 1, retrolateral 1; tI: dorsal 1-0, prolateral 1-1-1, retrolateral 1-1, ventral 2-2-2; ventral 2- 2. Leg formula: III-IV-I-II. Epigyne with two circular windows separated by narrow median guide ( Fig. 31 ). Copulatory openings located posteriorly and oriented laterally ( Fig. 33 ). Copulatory ducts and duct-like spermathecae long and twisted, with two accessory glands ( Figs 32–33 ). Dimensions. CL 1.51, CW 1.20, CH 0.80, AL 2.14, AW 1.25, EFL 0.70, AEW 1.09, PEW 1.04, DAM 0.63, Clypeus 0.04, leg I: 6.01 (1.66 + 1.23 + 1.41 + 1.17 + 0.54), leg II: 5.47 (1.58 + 1.11 + 1.20 + 1.06 + 0.52), leg III: 6.39 (2.05 + 1.14 + 1.13 + 1.50 + 0.57), leg: IV 6.36 (1.84 + 0.90 + 1.41 + 1.68 + 0.53).

Figures

FIGURES 18 – 26. Cytaea fibula. 18 male, dorsal view; 19 same, ventral view; 20 same, left palp, ventral view; 21 same, retrolateral view; 22 same, cephalothorax, lateral view; 23 chelicerae, endites and labium, ventral view; 24 same, frontal view; 25 – 26: same, schematic drawings of palp: 25 ventral view, 26 retrolateral view (e: embolus, rta: retrolateral tibial apophysis, sd: seminal duct, t: tegulum). Scale: 18 – 24 = 1 mm, 25 – 26 = as in fig.

FIGURES 27 – 33. Cytaea fibula. 27 female paratype, dorsal view; 28 same, ventral view; 29 same, frontal view; 30 same, chelicerae, endites and labium, ventral view; 31 same, epigyne ventral view; 32 same, vulva, dorsal view; 33 same, internal structure of epigynum (ag: accessory glands, co: copulatory opening, mg: median guide). Scale: 35 – 38 = 1 mm.