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

publication ID

http://doi.org/ 10.5281/zenodo.280155

persistent identifier

http://treatment.plazi.org/id/03ECD943-5969-FFAB-14ED-FF6EFE0DFE5B

treatment provided by

Plazi

scientific name

Aysenia huayun
status

new species

Aysenia huayun   new species

Figs 12–14 View FIGURE 12 View FIGURE 13 View FIGURE 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 View FIGURE 16 e), and depressions on the female epigyne lateral lobes ( Fig. 13 View FIGURE 13 a), but can be distinguished by having a compressed distal tooth on the chelicerae retromargin, close to the fang articulation ( Fig. 13 View FIGURE 13 f), and straight posterior eye row; females have uncoiled copulatory ducts and short, convergent ducts of the accessory bulbs ( Fig. 13 View FIGURE 13 d).

Description: Female (holotype): Prosoma length 2.02, width 1.08, slightly constricted between legs I and II ( Fig. 12 View FIGURE 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 View FIGURE 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-p 1-2; metatarsus v 0-2 -p 1 -p 1. II, femur = I; tibia p 1 ap; metatarsus v 2 -p 1 -p 1 or v 2 - 2 -p 1, p d 1. III, femur d 1 - 1 - 1, p 1 ap; tibia v 2 ap or 0-r 1-2; metatarsus v 2 - 0-2, p 0-1 - 1, r 1 ap, d 2 ap. IV, femur d 1 - 1 - 1; tibia v 2 - 2 -p 1, p v 1 bas, r 0-d 1 -d 1 -0 or v p 1 -p 1-2, p v 1 -v 1 -0-0, r 0-d 1 -0-0; metatarsus d 2 ap, v 2 -p 1-2, p 1 ap, r d 1 - d 1 -0 or v p 1 -p 1-2, r d 1 bas. 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 View FIGURE 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 View FIGURE 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 View FIGURE 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).

CAS

California Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Anyphaenidae

Genus

Aysenia