Aysenia cylindrica, 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 : 64

Aysenia cylindrica , new species Figure 24

TYPE: Male holotype from Chile, Región X, Valdivia province, Rincón de Piedra, south of Valdivia, 23–26.II.1979, L. Peña, deposited in AMNH, and female paratype from Valdivia, 1983, deposited in MHNS 837.

ETYMOLOGY: The specific name refers to the thin, elongate body.

DIAGNOSIS: Resembles A. araucana in body shape and genitalia, but can be distinguished by having relatively short, not coiled, female copulatory ducts and a shorter embolus.

FEMALE (paratype): Total length 4.75. Carapace length 1.43, width 0.75, wider on leg II. Length of tibia/metatarsus: I, 0.63/0.52; II, 0.59/0.51; III, 0.33/0.38; IV, 0.66/0.47. Palpal tarsus length 0.28. Chelicerae (fig. 24D) very strong, with three teeth on retromargin, basal one larger; fang short, thick. Sternum length 0.73, width 0.47. Spines: femora I–IV d 1–1–1. Leg I, tibia v 2–2–2 (the x­p1­ x displaced to prolateral, fig. 24E), p d1­ 0­ 1­ 0; metatarsus v 2­ r1 (the basal pair advanced), p 1. II, tibia v r1­ r1–2, p 0­ d1; metatarsus = I. III, tibia v r1ap; metatarsus v 0­ r1­ 0­ 2 or 0­ r1­ r1­ 2, p and r 1ap, d p1ap. IV, tibia v p1­ p1–2; metatarsus v 2–2–2, p and r 1ap, d p1ap. Femora I–III narrow, IV strong. Abdomen length 2.80, width 0.47, spiracle–epigastrium 2.00, spiracle–spinnerets 0.24. Col­ or: carapace pale brown, with bright cuticle, cephalic area darker. Legs, femora brownish violet with grayish longitudinal stripes; patella and tarsus I grayish, II pale gray, III cream; leg IV, patella and tarsus cream, tibia brownish violet, distally cream. Abdomen brownish violet, dark, with three whitish dorsal spots, covered by white hairs, two patches of white hairs on posterior end. Leg coxae pale, sternum, labium, endites, and venter dark. Epigyne (fig. 24F, G): lateral lobes widely separated, slightly elevated above median field. Copulatory ducts not coiled.

MALE (holotype, fig. 24A): Total length 4.00. Carapace length 1.47, width 0.87, wid­ er at leg II. Length of tibia/metatarsus: I, 0.96/0.74; II, 0.72/0.68; III, 0.44/0.51; IV, 0.77/0.61. Chelicerae slightly smaller than those of female. Sternum length 0.77, width 0.49. Spines as in female, except: leg II, metatarsus v 2–2. III, tibia v 2ap, p d1bas or 0, metatarsus p 0­ d1–1. IV, tibia v 0­ p1­ p1 or 0­ (p1­ r1)­ p1, r d1­ d1­ d1; metatarsus p 0­ d1–1. Abdomen length 2.17, width 0.73, spiracle–epigastrium 1.30, spiracle–spinnerets 0.10. Color (fig. 24A) as in female. Palp (fig. 24B, C): tibia short, width/length 0.93, RTA sharp, long. Cymbium relatively small, globose, cymbial conductor wide. Tegulum basal. Embolus with basal process flat, short, wide. Median apophysis apical, hook­shaped. Primary conductor heavily sclerotized, with sharp apex. Secondary conductor with short apical tip. Paramedian apophysis heavily sclerotized, forming longitudinal shallow ridge.

VARIABILITY: Female spines: III, tibia v 0­ r1­ r1; metatarsus v 2­ r1–2 or 2–0–2, p 0­ d1– 1. IV, tibia v p1­ (p1­ r1)­ 2, r 0­ d1; metatarsus r d1–0–1, d r1ap. Some specimens with anterior abdominal spot tenuous, divided longitudinally, or absent.

NATURAL HISTORY: Unknown.

DISTRIBUTION: Known only from a few localities in Valdivia and Río Negro provinces.

OTHER MATERIAL EXAMINED: ARGENTINA: Río Negro: San Carlos de Bariloche, Colonia Suiza, 800 m, 19.IX.1981, Nielsen and Karsholt, 1 immature (ZMK). CHILE: Región X (Los Lagos): Valdivia: Valdivia, 1983, E. Krahmer, 2♀ 1 immature (MHNS 837), 1♀ (MHNS 799), XI–XII.1982.

Figures

Fig. 24. Aysenia cylindrica, n. sp. A. Male (holotype). B. Same, palp, ventral view. C. Same, retrolateral view. D. Same, chelicera, ventral view. E. Female left leg I, ventral­prolateral view: arrow points to spine v x­p1­ x displaced prolaterally (paratype). F. Same, epigyne, ventral view. G. Same, cleared. Scale bars = A, 1 mm; B–D, F, G, 0.2 mm; E, 0.5 mm.