A taxonomic revision of the Neotropical spider genus Xiruana Brescovit 1997 (Araneae: Anyphaenidae, Anyphaeninae) Oliveira, Luiz Fernando M. Brescovit, Antonio D. Zootaxa 2015 3980 2 201 229 5CG45 [151,347,1783,1809] Arachnida Anyphaenidae Xiruana Animalia Araneae 23 224 Arthropoda species fiebrigi sp. nov.    Typematerial. Female holotypefrom Jardín Botánico, Assunción ( 25°16’55.91”S; 57°38’6.36”W), Paraguay, K. Fiebrig leg., deposited in ZMB3748.   Etymology. The specific name is a patronymic in honor of the collector of the holotype. Diagnosis. Females of  Xiruana fiebrigi  n. sp.resemble those of  X. gracilipesand  X. cocha  n. sp.by the epigynal plate with a triangular posterior border, but differs by the lack of a furrow along the anterior border and by the seminal receptacles inserted near the spermathecae ( Figs 13C–D).   Description. Female(ZMB 3748). Coloration as in  X. hirsuta. Total length 11.6, carapace length 4.1, width 3.3. Clypeus height 0.16. Eye diameters and interdistances: AME 0.16, ALE 0.16, PME 0.16, PLE 0.16; AME– AME 0.04, AME–ALE 0.06, PME–PME 0.24, PME–PLE 0.24, ALE–PLE 0.06. Chelicerae 2.2 long, with five promarginal teeth and five retromarginal denticles. Leg measurements: Leg I—femur 3.9/ patella 1.8/ tibia 4.1/ metatarsus 3.4/ tarsus 1.9/ total 15.1; II—3.7/ 1.6/ 3.5/ 3.1/ 1.2/ 13.1; III—2.9/ 1.2/ 2.0/ 2.4/ 0.9/ 9.4; IV—4.0/ 1.5/ 3.4/ 4.7/ 1.2/ 14.8. Leg spination: I—tibia v2-2-0, p0, r0, metatarsus v2-0-0, p0, r0; II—tibia v1-2-0, p0-0-1, r0, metatarsus v2-0-0, p0, r0; III—p1-0-1, r1-0-1; IV—tibia p1-1-1, r1-1-1. Abdomen: length 7.5, epigastric furrow 1.3 from tracheal spiracle, spiracle 4.3 from base of spinnerets. Epigynum: copulatory ducts curved anteriorly; fertilization ducts longer than spermathecae width ( Figs 13C–D).  Male. Unknown.   Other material examined. PARAGUAY. Asunción: ( 25°16'55.91"S; 57°38' 6.36W), Jardín Botánico, 1♀, K. Fiebrig leg. ( ZMB3748).   Distribution. Known only from Assunción, Paraguay( Fig. 16B).