Xiruana gracilipes ( Keyserling, 1891 )

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 : 202-203

Xiruana gracilipes ( Keyserling, 1891)

Figs 2 A–H; 15B

Aysha gracilipes Keyserling, 1891: 130 –131, pl. 4, figs 89, 89a (male holotype from Rio Grande do Sul, Brazil, von Ihering leg., deposited in BMNH 647, examined).

Aysha fulviceps Keyserling, 1891: 131 –132, pl. 4, fig. 90 (female holotype from Rio Grande do Sul, Brazil, von Ihering leg., deposited in BMNH 432, examined). Brescovit, 1997: 104 (Syn).

Aysha fulvicepes [sic]: Bonnet, 1955: 837.

Xiruana gracilipes: Brescovit, 1997: 104 , figs 274–282.

Diagnosis. Males of Xiruana gracilipes resemble those of X. hirsuta by the conical extremities of the branches of the retrolateral tibial apophysis and the subtriangular median tibial apophysis, but differ from this species by the conductor of Anyphaeninae narrow and curved at the apex, without retrolateral projection, and by the long extremities of the branches of the retrolateral tibial apophysis ( Fig. 2 A). Females resemble X. cocha n. sp. by the shape of the epigynal plate ( Fig. 14 C), but differ by the larger posterior border and internally by the thicker copulatory ducts and seminal receptacles with long ducts ( Figs 2 G, H).

Description. Male and female described by Brescovit (1997:104).

New records. BRAZIL, São Paulo: São Paulo, Parque Estadual do Jaraguá (23°27'33"S; 46°46'02"W), 1♀, 28.III.2014, J.L. Chavari & R. Indicatti leg. (IBSP 166120); Santa Catarina: Florianópolis (27°35'49"S; 48°32'56"W), 1♂, 12.II.2007, R.S. Melo leg. (IBSP 72660); Rio Grande do Sul: Porto Alegre (30°01'58"S; 51°13'48"W), Lomba do Pinheiro, 1♂, 03.I.2005, A.D. Brescovit leg. (IBSP 48392); Santana do Livramento (30°53'27"S; 55°31'58"W), Cerro Verde, Rincão da Bolsa, 1♂, 29.XI.2003, A.J. Bitencourt leg. (IBSP 84898). BOLIVIA, 1♀, no data (ZMB).

Distribution. Bolivia, South and Southeast Brazil, North Argentina. The records in Brescovit (1997: 105–106) were included in the distribution map. The single record from Bolivia was arbitrarily centralized ( Fig. 15 B).

Figures

FIGURE 2. Xiruana gracilipes (Keyserling): 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. Abbreviations: A, atrium; AB, anterior border; aRTA, anterior retrolateral tibial apophysis; CA, conductor of Anyphaeninae; CD, copulatory ducts; CO, copulatory opening; E, embolus; FC, furrow of conductor; FD, fertilization ducts; LB, lateral borders; MA, median apophysis; MTA, median tibial apophysis; PA, patellar apophysis; PB, posterior border; pRTA, posterior retrolateral tibial apophysis; S, spermatheca; SR, seminal receptacles; T, tegulum; VTP, ventral tegular process. Scale bars: A 0.4 mm; B 0.3 mm; C 0.1 mm; H 0.25 mm.

FIGURE 14. Xiruana tribarrense n. sp.: A female epigynum, ventral view; B same, dorsal view. Xiruana cocha n. sp.: C female epigynum, ventral view; D same, dorsal view. Scale bars: B, D 0.25 mm.

FIGURE 15. Known distribution of Xiruana species.