Aysenia izquierdoi, González, María E. & Ramírez, Martín J., 2012

González, María E. & Ramírez, Martín J., 2012, A revision and phylogenetic analysis of the spider genus Aysenia Tullgren (Araneae: Anyphaenidae, Amaurobioidinae), Zootaxa 3201, pp. 1-26 : 18-21

Aysenia izquierdoi new species

Fig. 15–18

Type material: Female holotype from Chile, Región X de Los Lagos, Chiloé province, Isla Chiloé, Piruquina, 10.II.1993, T. Cekalovic, temporary preparations MGM-00022, MGM-00023, MGM-00030, deposited in AMNH. Male paratype from Chile, Región X de Los Lagos, Chiloé province, Chinquén, S 42° 37.092', W 74° 06.073', 15 msl, 1.III.2008, Arias et al UCB, Fogging 150 cc/l, Nothofagus nitida , temporary preparations MGM-00044, MGM-00045, deposited in CAS (CASENT 9034010).

Etymology: The specific name is a patronym in honor of Matías Izquierdo, for his support and help during MEGM's graduation years.

Diagnosis: Resembles A. huayun n. sp. by the presence of a distinctive pattern of short and thick spines on the prolateral side of tibia IV ( Fig. 16 e) and depressions on the epigyne lateral lobes ( Fig. 16 a), but can be distinguished by having coiled female copulatory ducts and long accessory bulb ducts, and the male copulatory bulb with large primary conductor ( Figs 16 c and 18b).

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Description: Female (holotype): Prosoma length 1.06, width 0.64, slightly narrowed in front, wider on leg III. Length of tibia/metatarsus: I, 0.52/0.44; II, 0.50/0.40; III, 0.24; IV, 0.40/0.30. Palpal tarsus length 0.24. Chelicerae strong, with thick anterior spines ( Fig. 15 b), three contiguous teeth on retromargin, and three teeth on promargin, middle tooth larger. Sternum length 0.56, width 0.42. Spines: Leg I, femur d 1bas; tibia v p1ap, p d1- v1 -d1-0; metatarsus v p1-0. II, femur d 1-1-0; tibia = 0; metatarsus = 0. III, femur = 0; tibia = 0; metatarsus = 0. IV, femur d 1bas; tibia v 2 ap, p 2- v1 -0; metatarsus d p1ap, v p1-p1-p1, p 1ap. Prolateral spines on tibia IV short and thick ( Fig. 16 e). Leg III oriented forward. Opisthosoma length 1.78, spiracle-epigastrium 0.82, spiracle-spinnerets 0.22. Color in ethanol ( Fig. 15 a): Prosoma brown reddish, darker distally, ocular region dark. Chelicerae brown reddish. Legs brown yellowish with femora and tibiae slightly darker. Sternum pale brown. Opisthosoma dark brown, almost black, with two pale yellow dorsal patches covered by white hairs. Venter grayish uniform. Epigyne ( Fig. 16 a–e): Median field and copulatory openings in epigastric fold. Lateral lobes separate, posterior half strongly sclerotized, with depressions. Copulatory ducts coiled. Accessory bulbs with long, convergent ducts. Spermathecae irregular, contiguous.

Male (paratype): Prosoma length 1.28, width 0.82. Prosoma narrowed in front ( Fig. 17 b). Tibia/metatarsus length: I, 0.70/0.55; II, 0.67/0.52; III, 0.33/0.32; IV, 0.50/0.35. Chelicerae strong, with thick anterior bristles ( Fig. 18 e), three contiguous teeth on retromargin and three on promargin. Sternum length 0.76, width 0.40. Spines: femora I-IV d 1bas. Leg I, tibia v 0-0-p1-2, p 1-1; metatarsus v p1ap, p v1 -0. II, tibia v 2 ap, p 0-0-1-0; metatarsus v p1ap. III, femur = I. IV, tibia v 2 ap, p 2- v1 -0; metatarsus d p1ap, v p1-p1-p1, p 1ap. Prolateral spines on tibia IV short and thick. Opisthosoma length 1.50, spiracle-epigastrium 0.52, spiracle-spinnerets 0.12. Color in ethanol ( Fig. 17 a): Prosoma dark brown. Chelicerae brown. Legs yellowish brown with coxae and trochanters slightly lighter. Labium and sternum dark brown. Opisthosoma dark brown, almost black, with two pale yellow dorsal spots covered by white hairs. Venter dark brown. Palp ( Fig. 18 a–c): Tibia short, width/length 0.60. RTA long, acute, wider at base. Cymbial conductor wide. Tegulum basal. Embolus long. Median apophysis apical, hook-shaped. Large primary conductor with canal, more sclerotized in apical region. Paramedian apophysis with two sclerotized cusps, pPMA closer to primary conductor, short rPMa close to tegulum ( Fig. 18 b).

Natural history: Unknown.

Distribution: Only known from Chiloé province, near the type locality.

Other material examined: CHILE: Región X de Los Lagos, Provincia de Chiloé: Chinquen, S 42° 37.092', W 74° 06.073', 15 msl, 1.III.2008, Arias et al UCB, 1 immature, Fogging 150 cc/l, Nothofagus nitida (CASENT 9034011). Same data, 4 immatures (CASENT 9034012). Chinquen, S 42° 37.117', W 74° 05.968', 23 msl, 1.III.2008, Arias et al UCB, 1 immature, Fogging 150cc/l, Nothofagus nitida (CASENT 9034097). Río Cipresal, S 42° 35.181', W 74° 05.576', 9 msl, 2.III.2008, Arias et al UCB, 1 female, 2 immatures, Fogging 150cc/l, Nothofagus nitida (CASENT 9034071).

Figures

FIGURE 15. Aysenia izquierdoi new species. a – d female (a dorsal habitus; b prosoma, lateral view; c ventral habitus, ventral view; d prosoma, ventral view).

FIGURE 16. Aysenia izquierdoi new species. a epygine, ventral view; b vulva; c vulva, ventral view; d vulva, dorsal view; e leg IV, prolateral view.

FIGURE 17. Aysenia izquiedoi new species. a - d male (a dorsal habitus; b prosoma, dorsal view; c ventral habitus, ventral view; d prosoma, ventral view).

FIGURE 18. Aysenia izquierdoi new species. a - c male left palp, (a prolateral view; b ventral view; c retrolateral view); d prosoma, anterior view.