Xiruana aymara, Oliveira, Luiz Fernando M. & Brescovit, Antonio D., 2015

Oliveira, Luiz Fernando M. & Brescovit, Antonio D., 2015, A taxonomic revision of the Neotropical spider genus Xiruana Brescovit 1997 (Araneae: Anyphaenidae, Anyphaeninae), Zootaxa 3980 (2), pp. 201-229 : 216

Xiruana aymara new species

Figs 9 A–H; 15B

Type material. Male holotype from Cerro Uchumachi, 7 km Coroico 1900m (16°15’00”S; 67°21’00”W), La Paz, Bolivia, 24–25.XI.1989, Coddington, Griswold, Larcher, Peñaranda, Silva leg., deposited in USNM; female paratype from Puente Mururata, Coroico 1200m (16°30’00”S; 67°49’60”W), La Paz, Bolivia, 24–26.XI.1894, L. E. Peña leg., deposited in AMNH.

Etymology. The specific name, a noun in apposition, is a tribute to the Andean people Aymara , who lived in the region of Coroico.

Diagnosis. Males of Xiruana aymara n. sp. are easily distinguished from other male forms in the genus by the palp with the posterior region of the median tibial apophysis long and curved at the apex, and by the entire retrolateral tibial apophysis, without posterior branch ( Figs 9 D–F). Females resemble those of X. affinis by the posterior border of the epigynum twice as wide as the anterior border, but differ by the inconspicuous atrium and by the copulatory ducts curved anteriorly ( Figs 9 G, H).

Description. Male (Holotype). Coloration as in X. hirsuta . Total length 4.0, carapace length 1.9, width 1.5. Clypeus height 0.04. Eye diameters and interdistances: AME 0.1, ALE 0.1, PME 0.08, PLE 0.08; AME–AME 0.04, AME–ALE 0.02, PME–PME 0.1, PME–PLE 0.1, ALE–PLE 0.04. Chelicerae 0.6 long, with four promarginal teeth and five retromarginal denticles. Leg measurements: Leg I—femur 1.9/ patella 0.7/ tibia 1.9/ metatarsus 1.6/ tarsus 0.9/ total 7.0; II—1.6/ 0.6/ 1.4/ 1.3/ 0.6/ 5.5; III—1.2/ 0.6/ 0.9/ 1.1/ 0.4/ 4.2; IV—1.9/ 0.6/ 1.6/ 2.0/ 0.5/ 6.6. Leg spination: I—tibia p1-1-0, r0-1-0; II—tibia p1-1-0, r0-1-0, metatarsus v2-1 -0, p0; IV—tibia p1-1-1, r1-1-1. Palp: anterior retrolateral tibial apophysis conical; ventral tegular process large; median apophysis curved at tip with rounded apex ( Figs 9 A–F). Abdomen: length 2.0, epigastric furrow 0.4 from tracheal spiracle, spiracle 1.1 from base of spinnerets.

Female (Paratype). Coloration as in male. Total length 6.3, carapace length 2.3, width 1.6. Clypeus height 0.06. Eye diameters and interdistances: AME 0.08, ALE 0.08, PME 0.08, PLE 0.08; AME–AME 0.04, AME–ALE 0.02, PME–PME 0.12, PME–PLE 0.08, ALE–PLE 0.02. Chelicerae 0.9 long, with four promarginal teeth and five retromarginal denticles. Leg measurements: Leg I—femur 1.5/ patella 0.7/ tibia 1.4/ metatarsus 1.1/ tarsus 0.7/ total 5.4; II—1.0/ 0.5/ 1.0/ 0.8/ 0.5/ 3.8; III—1.3/ 0.5/ 0.8/ 0.9/ 0.4/ 3.9; IV—1.9/ 0.7/ 1.5/ 1.8/ 0.6/ 6.5. Leg spination: I—tibia v2-2 -0, p0, r0, metatarsus v2 -0-0, p0, r0; II—tibia v1-2 -0, p0, r0, metatarsus v2 -0-0, p0, r0; III—tibia v1-1 -2, p0-1-1, r0-1-1; IV—tibia v1-2 -2, p1-1-1, r1-1-1. Abdomen: length 3.9, epigastric furrow 0.8 from tracheal spiracle, spiracle 2.1 from base of spinnerets. Epigynum: seminal receptacles inserted distally on the copulatory ducts, fertilization ducts longer than spermathecae width ( Figs 9 G, H).

Other material examined. Only the types.

Distribution. Known only from La Paz, Bolivia ( Fig. 15 B).

Figures

FIGURE 9. Xiruana aymara n. sp.: A male left palp, ventral view; B same, retrolateral view; C same, median apophysis; D male palpal tibia, retrolateral view; E same, retrodorsal view; F same, dorsal view; G female epigynum, ventral view; H same, dorsal view. Scale bars: A 0.3 mm; B 0.2 mm; C 0.05 mm; H 0.25 mm.

FIGURE 15. Known distribution of Xiruana species.