Aysenia elongata Tullgren
Creators: name: González, María E.
name: Ramírez, Martín J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Anyphaenidae
Aysenia
Aysenia elongata

description: Aysenia elongata Tullgren
Figs 1–4
Aysenia elongata Tullgren, 1902: 54 (female lectotype and female paralectotype [only a prosoma, broken], from Chile, Río Aisén Va lley, in NRS, not reexamined). Simon, 1903a: 1031. Merian, 1913: 12. Ramírez, 1995a: 366; 2003: 61.
Diagnosis: Easily identified by the extremely elongated body, with the opisthosoma about twice the length of the prosoma, with pale yellow dorsum with contrasting dark pattern (Figs 1 a, 2a). It resembles A. huayun sp. n. and A. izquierdoi sp. n. by lacking most spines on metatarsus III, but can by distinguished by lacking the group of short and thick spines in the metatarsus IV characteristic of those species (Fig. 16 e).
Description: Female (MACN-Ar 27065, Fig. 1): Prosoma length 0.88, width 0.48, narrowed in front, slightly wider at leg III (Fig. 1 b). Length of tibia/metatarsus: I, 0.40/0.30; II, 0.34/0.34; III, 0.22/0.20; IV, 0.32/0.20. Palpal tarsus length 0.28. Chelicerae strong, with thick anterior bristles, three contiguous teeth on retromargin, and three very small teeth on promargin. Sternum length 0.54, width 0.34. Spines: femora I-IV d 1-1-1. Leg I, tibia v 2-2 -0; metatarsus v 2 bas. II, tibia r1; metatarsus v r1-r1-0, p 1. III, tibia apparently 0; metatarsus v 1 ap and apical group of thick setae. IV, tibia v p1-p1-p1; metatarsus v p1-2-comb (preening comb not in a definite line). Opisthosoma length 1.94, spiracle-epigastrium 1.18, spiracle close to spinnerets. Color in ethanol (Fig. 1 a): Prosoma brown, legs pale yellow, darker distally. Opisthosoma pale yellow on the back with two longitudinal reticulated dark brown bands confluent at the hind-end; sides with longitudinally arranged, scattered short stripes of the same color; venter brown uniform. Epigyne (Fig. 3 a): lateral lobes separate, median field and copulatory openings in epigastric fold, all weakly sclerotized. Spermathecae irregular, contiguous, copulatory ducts contorted. Accessory bulbs voluminous (Fig. 3 a, Ramírez 2003: fig. 22c–d).
Male (MACN-Ar 27066. Fig. 2): Prosoma length 0.94, width 0.56, narrowed in front, slightly wider on leg III (Fig. 2 b). Length of tibia/metatarsus: I, 0.74/0.50; II, 0.52/0.38; III, 0.28/0.24; IV, 0.40/0.36. Palpal tarsus length 0.32. Chelicerae strong, with thick anterior bristles, three contiguous teeth on retromargin, and three very small teeth on promargin. Sternum length 0.52, width 0.36. Spines: femora I-IV d 1-1-1. Leg I, tibia v 2-2 -0; metatarsus v 2 bas. II, tibia v r1 or r1-r1-0; metatarsus v r1-0-0, p 1-0-0 or v r1-0-0, p 1. III, tibia apparently 0; metatarsus v 1 ap and apical group of thick setae. IV, tibia v p1-p1-p1; metatarsus v p1-p1-p1, d r1ap. Opisthosoma length 1.76, spiracle-epigastrium 1.04, spiracle close to spinnerets. Color in ethanol (Fig. 2 a): As in female. Palp (Fig. 3 a–c): Tibia short, width/length 0.32, RTA long, acute, wider at base. Cymbial conductor wide. Tegulum basal. Sperm duct with two conspicuous loops at anterior dorsal margin. Embolus long. Median apophysis apical, small and hook-shaped. Primary conductor with canal, heavily sclerotized in apical region. Secondary conductor well defined, without canal, separated from the apical tegulum by a suture. Paramedian apophysis with three cusps (Fig. 4 c–d), one large, close to the median apophysis (rPMA), one small slightly sclerotized, close to the primary conductor (pPMA) and a small sclerotized one in between (iPMA).
Distribution: Forests in southern Argentina and Chile, from Osorno to Tierra del Fuego.
New records: ARGENTINA: Neuquén: Nahuel Huapi National Park, Puerto Blest, trail to Laguna Los Cántaros, S 41.013754°, W 71.822738° (1500 m), 820–890 m, 28.XII.2010, M. Ramírez, V. Werenkraut, S. Aisen, 1 immature, (MACN-Ar 27070). Río Negro: Nahuel Huapi National Park, trail to Cascada Los Alerces, Río Manso, S 41.381933°, W 71.736417° (300 m), elev. 801 m, 13.IX.2010, M. Ramírez & V. Werenkraut, 1 male, temporary preparations MGM-00024, MGM-00025 (MACN-Ar 27066). Nahuel Huapi National Park; trail to Cerro La Mona, near Lago Espejo Chico, S 40.590821°, W 71.704036° (+/- 400 m), GPS, elev. 815–840 m (barometer), 5.I.2011, M. Ramírez & V. Werenkraut, 4 immatures, (MACN-Ar 27068); same data, forest of Nothofagus dombeyi and Chusquea, 5.I.2011, M. Ramírez & V. Werenkraut, 1 immature, (MACN-Ar 27071). Same locality, S 40.580069°, W 71.702972° (+/- 60 m), GPS, elev. 815–840 m (barometer), forest of Nothofagus dombeyi and Chusquea, 5.I.2011, M. Ramírez & V. Werenkraut, 1 female, 1 immature, (MACN-Ar 27065). CHILE: Región IX de la Araucanía, Provincia de Cautín: Huerquehue National Park, Laguna Toro, forest of Nothofagus, Araucaria, Chusquea, S 39° 08' 18.7”, W 71° 42' 30.9”, 995 m, 7.II.2005, M. Ramírez & F. Labarque, 1 female (MACN–Ar 10828). Villarrica National Park, sector Quetrupillén, forest of Araucaria, Nothofagus, Chusquea, S 39° 27' 42.1”, W71° 50' 44.2”, 1280 m, 8.II.2005, M. Ramírez & F. Labarque, 1 immature (MACN-Ar 27069). Provincia de Malleco: Nahuelbuta National Park, forest of Nothofagus, Araucaria, S 37° 49' 39.0”, W 73° 00' 32.2”, 1100 m, 12.II.2005, M. Ramírez & F. Labarque, 1 female (MACN–Ar 10826); 1 female (MACN–Ar 10869), 1 female, 1 male (MACN-Ar 27067). Región X de Los Lagos, Provincia de Chiloé: Isla Chiloé, Puente La Caldera, 18.II.1997, T. Cekalovic, 1 female (AMNH). Isla de Chiloé, Chinquen, S 42° 37.092', W 74° 06.073', 15 m, 1.III.2008, Arias et. al. UCB, 55 females, fogging 150 cc/l, Nothofagus nitida (CASENT 9034005). Same data, 1 male (CASENT 9034021).
description: Published as part of González, María E. & Ramírez, Martín J., 2012, A revision and phylogenetic analysis of the spider genus Aysenia Tullgren (Araneae: Anyphaenidae, Amaurobioidinae), pp. 1-26 in Zootaxa 3201 on pages 3-6, DOI: 10.5281/zenodo.280155