Allocosa yurae (Strand, 1908)

Brescovit, Antonio D. & Taucare-Rios, Andres, 2013, Description of the female of Allocosa yurae (Strand, 1908) (Araneae: Lycosidae, Allocosinae), Zootaxa 3647 (3), pp. 495-498 : 496-498

Allocosa yurae (Strand, 1908)

Figs 1–5

Tarentula yurae Strand 1908: 242 (Holotype, immature female, from Yura [16°15'S, 71°41'W], Department Arequipa, Peru, 1907, K. Seyd, MWNH 441, examined).

Lycosa yurae: Petrunkevitch, 1911: 569 .

Lycosa yurensis: Bonnet, 1957: 2670 .

Avicosa yurae: Roewer, 1955: 236 .

Schizocosa yurae: Dondale & Redner, 1978: 146 .

Allocosa yurae: Brescovit & Álvares, 2011: 59 , figs 22–25.

Other material examined. CHILE. Arica y Parinacota Region: Parinacota Province: 62 km from Putre, Quebrada de Allane [17°59’S 69°38’W], 3851m, I-VI.2011 A. Taucare Rios col., 1 3 (IBSP 163254); same data, 1 Ƥ (IBSP 163255); same data, 1 Ƥ (MNHN).

Diagnosis. The female of Allocosa yurae is easily distinguished from A. brasiliensis and A. orinus by the shape of the head of the spermathecae, which is elongated in A. yurae ( Fig. 2 ) and oval and not projected in the other two species (see Capocasale 1990: fig. 5 and Chamberlin, 1916, pl. 24, fig. 1, respectively).

Description. Male: Described by Brescovit & Álvares, 2011: 59. Female (IBSP 163255): Total length 9.3. Carapace length 4.0, width 2.8. Eyes: anterior row slightly procurved; AME 0.18, ALE 0.18, PME 0.32, PLE 0.28, AME–AME 0.08, AME–ALE 0.04, PME–PME 0.24, PME–PLE 0.32, PLE–PLE 0.66. Legs: I: femur 2.6/ patella 1.3/ tibia 2.0/ metatarsus 2.0/ tarsus 1.3/ total 9.2; II: 2.6/ 1.3/ 1.7/ 2.0/ 1.2 /8.8; III: 2.3/ 1.2/ 1.7/ 2.3/ 1.3/ 8.8; IV: 3.5/ 1.4/ 2.5/ 3.2/ 1.5/ 12.1. Leg spination: femur I: p0-0-1, d1-1-1, r0-0-1, II: p0-0-1, d1-1-1, r0-0-1, III: p0-1-1, d1-1-1, r0-1-1, IV: p0-0-1, d1-1-1, r0-0-1; patellae I–II: p0, r0; III–IV: p1, r1; tibia I: p0, d0, r0, v2-2 -2, II: p1-1-0, d0, r0, v1 r-1r-2, III: p1-1-0, d0, r1-1-0, v2-1 p-2, IV: p1-1-0, d0, r1-1-0, v2-2 -2; metatarsus I: p0, r0, v2-2 - 1m; II: p0-1-2, r0-0-1, v2-2 - 1m, III: p1-1-2, r1-1-1, v2-2 - 1m, IV: p1-1-2, r1-1-1, v2-2 - 1m. Chelicerae: promargin with two small teeth, retromargin with three teeth, median tooth largest. Epigynum: epigynal plate not elevated, with lateral projections rounded at the bases. Copulatory opening located posteriorly, anterior to lateral projections ( Fig. 1 ). Spermathecae tubular at base and elongated dorsally, kidney shaped in anterior view; inconspicuous copulatory ducts and sinuous fertilization ducts ( Figs 2–3 ).

Colouration as in male.

Biology. Allocosa yurae has been found in wetlands in the highlands of northern Chile. These spiders build their nests in holes in damp ground or under rocks near Distichia muscoides Nees & Meyen (Juncaceae) and Oxychloe andina Phil. (Juncaceae) ( Figs 4–5 ). Specimens have been collected by hand on the ground or with pitfalls traps.

Distribution. South of Peru (Arequipa) and North of Chile (Arica y Parinacota).

Acknowledgments

We are grateful to M. Elgueta (MNHN) for the donation of the one female to IBSP collection. Also, we thank Luis Piacentini (Museo Argentino de Ciencias Naturales Bernardino Rivadavia), an anonymous reviewer and Cor Vink (Canterbury Museum, New Zealand) for comments and corrections on the manuscript. Financial support for this work was provided by FAPESP (grant # 2011/50689-0) and CNPq (grant # 301776/2004-ADB).

References

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Figures

FIGURES 1 – 3. Allocosa yurae (Strand, 1908), female epigynum (IBSP 163255). 1 ventral view; 2 dorsal view; 3 anterior view. Abbreviations: fd—fertilization ducts; hs ― head of spermathecae; s ― spermathecae. Scale line = 0.5 mm.

FIGURES 4 – 5. Habitats where Allocosa yurae (Strand, 1908) has been found. 4 Highlands of Northern Chile, natural environment. 5 Wetlands of Parinacota Province, Quebrada de Allane of Northern Chile.