Tasata taim, RAMÍREZ, 2003

RAMÍREZ, MARTÍN J., 2003, The Spider Subfamily Amaurobioidinae (Araneae, Anyphaenidae): A Phylogenetic Revision At The Generic Level, Bulletin of the American Museum of Natural History 2003 (277), pp. 1-262 : 236-237

Tasata taim , new species Figure 130

TYPES: Male holotype and penultimate female paratype from Brazil, State of Rio Grande do Sul, Santa Vitória do Palmar, Estação Ecológica do Taim, ca. 33 °31̍S, 53°21̍W, 12.IX.1991, A. Lise, in MCTP 0992. The female was close to ecdysis, and the genitalia could be dissected.

ETYMOLOGY: The specific name is a noun in apposition taken from the type locality.

DIAGNOSIS: Distinguished from other Tasata by having a greenish, extremely elongate abdomen, and a flattened carapace with white hairs at the sides.

FEMALE (penultimate, paratype): Abdomen extremely elongate, legs very long, including leg III. Total length 7.58. Carapace length 2.50, width 1.87, wider on legs II–III. Length of tibia/metatarsus: I, 2.87/2.50; II, 2.80/ 2.43; III, 1.90/1.83; IV, 2.63/2.93. Palpal tarsus length 1.00. Chelicerae with four teeth on promargin, three on retromargin, apical one smaller. Sternum length 1.27, width 1.07. Spines (long on anterior legs): leg I, femur d 1–1–1, p 0­ d1­ 1­ 0­ d1, r 0­ d1­ d1; tibia v 2­ p1­ 2­ 0­ 2 (x­p1­ x­x­x abnormal, absent in other female and male), p d1­ d1­ 1­ 0 or d1– 1, r d1–1; metatarsus v 2bas, p and r d1–1– 0, d 0­ p1­ 0­ 2. II, femur d 1–1–1, p and r 0­ d1­ d1; tibia v 2–2–2, p and r d1–1; metatarsus = I. III, femur = II; patella r d1; tibia v 2–2–2, p and r 1–1, d r1­ 0­ 1­ 0; metatarsus v 2–2–2, p and r d1–1–1, d 0­ p1–2. IV = III. Abdomen length 5.45, width 2.00, spiracle– epigastrium 2.40, spiracle–spinnerets 1.57. Color as in male. Epigyne (not sclerotized, disected from immature, similar to that of mature female, fig. 130F, G): lateral lobes separate, anterior pouch ample. Copulatory openings close to epigastric furrow, copulatory ducts thin (most probably because of being unsclerotized), ducts of accessory bulbs long (but short in adult female). Spermathecae unmodified, spherical (collapsed in clove oil).

MALE (holotype): Total length 8.25. Carapace length 2.90, width 2.10. Length of tibia/metatarsus: I, 4.99/4.66; II, 4.52/4.12; III, 3.07/2.93; IV, 4.12/4.39. Left chelicera with two teeth on retromargin, apical one missing, right normal. Sternum length 1.50, width 1.23. Spines as in female, except: leg I, tibia v 2–2–2, p 1–1. III, metatarsus v 2­ r1–2. Abdomen length 5.60, width 1.73, spiracle–epigastrium 2.23, spiracle–spinnerets 1.83. Col­ or (fig. 130A): carapace pale grayish with three longitudinal dark bands, one median, two laterals. Many white hairs covering clypeus, margins of carapace, its pale stripes, pale areas of sternum, coxae. Legs grayish with small dark dots, contrasting on femora. Sternum, labium, endites yellow, each with longitudinal stripe of irregular dark spots, darker on anterior, posterior ends of sternum. Dorsum of abdomen with white guanine reticulum (except on cardiac area and posterior end), wide grayish band, from posterior half of cardiac area to anal tubercle; sides grayish. Venter with white guanine reticulum, two longitudinal stripes from epigastrium to spinnerets, touching corners of tracheal spiracle. Epigastrium with two longitudinal spots, at internal margins of pulmonary plates. Palp (fig. 130B–E): tibia long, width/length 0.47. Sperm duct with loop approximating anterior ventral margin of tegulum, slight spiral before reaching the embolus. Embolus very thin, without basal process, membranous area ample, concave, projecting dorsally. Paramedian apophysis sinuous, with acute tip. Primary conductor concave, rounded, apex in contact with lobe on prolateral portion of secondary conductor. Prolateral portion of secondary conductor with denticles at apical margin; retrolateral portion with tiny denticles.

VARIABILITY: Female MCTP 6852 has an additional, smaller distal tooth on the cheliceral promargin. The differences in the spermathecae are presumably because of incomplete development of the paratype.

NATURAL HISTORY: Unknown.

DISTRIBUTION: Known only from type locality.

OTHER MATERIAL EXAMINED: BRASIL: Rio Grande do Sul: Porto Alegre, 22.I.1995, W. Guevell, 1♀ (MCTP 6852).

Figures

Fig. 130. Tasata taim, n. sp. A. Male (holotype). B. Male palp, ventral view. C. Same, retrolateral view. D. Copulatory bulb, retrolateral­ventral view. E. Same, cleared, detail prolateral. F. Cleared epigyne, ventral view (paratype, spermathecae collapsed during clearing). G. Cleared epigyne, ventral view (MCTP 6852). Scale bars = A, 1 mm; B, C, 0.25 mm; D, E 0.2 mm; F, G, 0.1 mm. (E = embolus; St = subtegulum; T = tegulum.)