Xiruana guaia, 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 : 220

Xiruana guaia new species

Figs 11 A–F; 16A

Type material. Male holotype from Usina Hidrelétrica Serra da Mesa, Minaçu 13°31’58”S; 48°13’12”W, Goiás, Brazil, 18–30.XI.1996, A.B. Bonaldo, L. Moura leg., deposited in MCN 27960.

Etymology. The specific name is a compound noun from the indigenous language Tupi, roughly meaning “similar people”, from which the name of the state of Goiás is derived.

Diagnosis. Males of Xiruana guaia n. sp. are promptly recognized by the median apophysis strongly curved medially, forming a bend with more than 90 degree, and by the short median tibial apophysis ( Figs 11 A–F).

Description. Male (MCN 27960). Coloration as in X. hirsuta . Total length 6.7, carapace length 3.0, width 2.4. Clypeus height 0.08. Eye diameters and interdistances: AME 0.16, ALE 0.14, PME 0.14, PLE 0.14; AME–AME 0.02, AME–ALE 0.04, PME–PME 0.14, PME–PLE 0.12, ALE–PLE 0.04. Chelicerae 1.30 long, with five promarginal teeth and five retromarginal denticles. Leg measurements: Leg I—femur 3.2/ patella 1.3/ tibia 3.58/ metatarsus 3.3/ tarsus 1.6/ total 12.98; II—2.9/ 1.2/ 2.9/ 2.7/ 1.2/ 10.9; III—2.2/ 1.0/ 1.7/ 2.0/ 0.73/ 7.63; IV—3.0/ 1.1/ 2.8/ 3.72/ 0.9/ 11.52. Leg spination: I—tibia p0-1-0, r1-1-1, metatarsus v2 -0-0; II—tibia r1-1-1, metatarsus v2 - 0-0; III—tibia p1-1-1, r1-1-1; IV—tibia p1-1-1, r1-1-1. Palp: retrolateral tibial apophysis anterior branch short, posterior branch elongated; embolus flattened ( Figs 11 A–F). Abdomen: length 3.6, epigastric furrow 0.5 from tracheal spiracle, spiracle 2.0 from base of spinnerets.

Female: Unknown.

Other material examined. BRAZIL, Amazonas: Manaus, (03°06'00"S; 60°01'00"W), Reserva Florestal Adolpho Ducke, 1♂ ( IBSP 165982).

Distribution. Midwest and North Brazil ( Fig. 16 A).

Figures

FIGURE 11. Xiruana guaia n. sp.: A male left palp, ventral view; B same, retrolateral view (arrow: basal projection of median apophysis); C same, median apophysis; D male palpal tibia, retrolateral view; E same, retrodorsal view; F same, dorsal view. Xiruana affinis (Mello-Leitão): G female epigynum, ventral view; H same, dorsal view. Scale bars: A, B 0.5 mm; C 0.1 mm; H 0.25 mm.

FIGURE 16. Known distribution of Xiruana species.