Aysenia huayun, 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 : 15-17

Aysenia huayun new species

Figs 12–14

Type material: Female holotype from Chile, Región V de Valparaíso, Petorca province, Zapallar, 27.XI.1950, Ross & Michelbacher, temporary preparations MGM-00017, MGM-00018, MGM-00019, deposited in CAS.

Etymology: The specific name is a noun in apposition taken from the word “spine” in the language of the Mapuche, indigenous inhabitants of southern Chile and Argentina, and referring to the distinctive spine pattern of the new species.

Diagnosis: Resembles A. izquierdoi 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 female epigyne lateral lobes ( Fig. 13 a), but can be distinguished by having a compressed distal tooth on the chelicerae retromargin, close to the fang articulation ( Fig. 13 f), and straight posterior eye row; females have uncoiled copulatory ducts and short, convergent ducts of the accessory bulbs ( Fig. 13 d).

Description: Female (holotype): Prosoma length 2.02, width 1.08, slightly constricted between legs I and II ( Fig. 12 b). Length of tibia/metatarsus: I, 1.22/1.02; II, 1.12/0.94; III, 0.62/0.60; IV, 0.96/0.80. Palpal tarsus length 0.54. Chelicerae strong, with thick anterior bristles ( Fig. 12 d), three contiguous teeth on retromargin, distal one compressed, and three teeth on promargin, middle tooth larger. Sternum length 1.04, width 0.62. Spines: Leg I, femur d 1-1-1; tibia v 0-p1-2; metatarsus v 0-2-p1-p 1. II, femur = I; tibia p 1ap; metatarsus v 2 -p1-p1 or v 2-2 -p1, p d 1. III, femur d 1-1-1, p 1ap; tibia v 2 ap or 0-r1-2; metatarsus v 2 -0-2, p 0-1-1, r 1ap, d 2ap. IV, femur d 1-1-1; tibia v 2-2 -p1, p v1 bas, r 0-d1-d1-0 or v p1-p1-2, p v1-v1 -0-0, r 0-d1-0-0; metatarsus d 2ap, v 2 -p1-2, p 1ap, r d1- d1-0 or v p1-p1-2, r d1bas. Prolateral spines on tibia IV short and thick. Leg III oriented forward. Opisthosoma length 4.12, spiracle-epigastrium 2.32, spiracle-spinnerets 0.48. Color in ethanol ( Fig. 12 a): Prosoma reddish brown, lighter towards posterior region, ocular region dark. Chelicerae reddish brown. Legs yellowish brown with coxae and trochanters slightly lighter. Sternum brown. Opisthosoma grayish brown, with four pale yellow dorsal spots, two largest in the middle and four patches on posterior end, all covered by white hairs. Venter pale yellow uniform. Epigyne ( Fig. 13 ): Median field and copulatory openings in epigastric fold. Lateral lobes separate, posterior half strongly sclerotized, with depressions. Copulatory ducts not coiled, ducts of accessory bulbs short, convergent. Spermathecae irregular, contiguous.

Male unknown.

Variability: Color of immature specimen, currently alive in the laboratory: prosoma and ocular region dark brown, almost black. Chelicerae dark brown. Femur, patella and tibia brown, coxae and trochanters lighter. Opisthosoma dark brown, same pattern of patches as MACN-Ar 27074, all covered with white hairs ( Fig. 14 ).

Natural history: Specimens from Quebrada El Tigre were collected beating boldo ( Peumus boldus ) foliage.

Distribution: Known only from Petorca province, close to Zapallar.

Other material examined: CHILE: Región V de Valparaíso: Provincia de Petorca: Zapallar, 27.XI.1950, Ross & Michelbacher, 1 female, 1 immature male ( CAS); road to Quebrada El Tigre, beginning S 32.55294° W 71.43436°, elev. 357 m, end S 32.55423° W 71.43551°, elev. 348m, 13.II.2011, Ramírez M., Pizarro J., Soto E., 1 immature (MACN-Ar 27074).

Figures

FIGURE 12. Aysenia huayun new species. a - d female (a dorsal habitus; b prosoma, dorsal view; c ventral habitus, ventral view; d prosoma, ventral view).

FIGURE 13. Aysenia huayun new species. a epygine, ventral view; b vulva; c epygine, posterior view; d vulva, ventral view; e vulva, dorsal view; f chelicerae, arrow to compressed distal tooth.

FIGURE 14. Aysenia huayun new species. Immature specimen currently alive in laboratory.

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.