Xiruana pocone, 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 : 210-212

Xiruana pocone new species

Figs 6 A–H; 16A

Teudis lenis: Mello-Leitão, 1941: 203 (male, MLP 15048, examined, misidentification).

Type material. Male holotype and female paratype from Porto Cercado (16°15'25"S; 56°37'22"W), Poconé , Mato Grosso, Brazil, 17–18.II.2010, L.D. Battirola leg., deposited in IBSP 165991 and 165990, respectively. Male and female paratypes from Parque Nacional Pilcomayo, Província Formosa, Buenos Aires: Argentina, XI.1990, M. Ramírez leg., deposited in MACN.

Etymology. The specific name is a noun in apposition taken from the type locality.

Diagnosis. Males of Xiruana pocone n. sp. resembles those of X. jaboticabal n. sp. by the palp with extremely long base of conductor of Anyphaeninae, distant from the ventral tegular process, but differs by the thin, small anterior branch of the retrolateral tibial apophysis, and conspicuous triangular median tibial apophysis ( Figs 6 D– F). Females resemble those of X. tetraseta by the shape of the epigynal plate, but differ by the narrower median septum and internally with shorter copulatory ducts and fertilization ducts superposed to the spermathecae ( Figs 6 G, H).

Description. Male (IBSP 165991). Coloration as in X. hirsuta . Total length 7.6, carapace length 3.2, width 2.5. Clypeus height 0.12. Eye diameters and interdistances: AME 0.14, ALE 0.14, PME 0.14, PLE 0.14; AME–AME 0.04, AME–ALE 0.04, PME–PME 0.16, PME–PLE 0.14, ALE–PLE 0.02. Chelicerae 1.9 long, with four promarginal teeth and six retromarginal denticles. Leg measurements: Leg I—femur 4.0/ patella 1.5/ tibia 4.7/ metatarsus 4.4/ tarsus 1.8/ total 16.4; II—3.5/ 1.4/ 3.9/ 3.6/ 1.5/ 13.9; III—2.6/ 1.1/ 2.0/ 2.6/ 0.9/ 9.2; IV—3.5/ 1.3/ 3.2/ 4.4/ 1.0/ 13.4. Leg spination: I—tibia p1-1-0, r1-0-0, metatarsus p0, r0; II—tibia p1-1-0, r1-0-0, metatarsus v2- 1 -0, p0, r0; III—tibia p1-0-1, r1-0-1; IV—tibia p1-1-1, r1-1-1. Palp: posterior branch of the retrolateral tibial apophysis long and curved at apex, anterior branch slender ( Figs 6 D–F); median apophysis long and narrow ( Figs 6 A–C). Abdomen: length 4.2, epigastric furrow 0.6 from tracheal spiracle, spiracle 2.4 from base of spinnerets.

Female (IBSP 165990). Coloration as in male. Total length 9.0, carapace length 3.3, width 2.6. Clypeus height 0.08. Eye diameters and interdistances: AME 0.14, ALE 0.16, PME 0.16, PLE 0.16; AME–AME 0.04, AME–ALE 0.02, PME–PME 0.18, PME–PLE 0.12, ALE–PLE 0.04. Chelicerae 1.5 long, with five promarginal teeth and six retromarginal denticles. Leg measurements: Leg I—femur 3.3/ patella 1.3/ tibia 3.6/ metatarsus 3.1/ tarsus 1.3/ total 12.6; II—3.1/ 1.2/ 3.1/ 2.7/ 1.1/ 11.2; III—2.4/ 1.0/ 1.9/ 2.4/ 0.8/ 8.5; IV—3.4/ 1.3/ 2.9/ 3.9/ 1.0/ 12.5. Leg spination: I—tibia v2-2 -0, p0, r0, metatarsus v2 -0-0, p0, r0; II—tibia v2-2 -0, p1-1-0, r0, metatarsus v2 -0-0, p0, r0; IV—tibia p1-1-1, r1-1-1. Abdomen: length 5.7, epigastric furrow 0.8 from tracheal spiracle, spiracle 3.4 from base of spinnerets. Epigynum: epigynal plate with posterior border wider than anterior border; internally, seminal receptacles with short ducts, fertilization ducts with same length as spermathecae and copulatory ducts curved ( Figs 6 G, H).

Variation. Males (n = 7): total length 7.3–8.7; carapace 3.2–3.8; femur I 3.6–4.1. Females (n = 10): total length 8.2–10.5; carapace 3.4–3.8; femur I 2.5–3.7.

Other material examined. BRAZIL, Tocantins: Palmas Lajeado, Usina Hidrelétrica Luis Eduardo Magalhães (9°45'34"S; 48°22'15"W), 1♂, 6♀, 12.I.2002, D.M. Candido; M. Costa leg. ( IBSP 40369); Mato Grosso: Poconé (16°15'25"S; 56°37'22"W), Porto Cercado, 1♂, 17.II.2010, ( IBSP 165985); 1♀, 18.II.2010, ( IBSP 165986); 1♀, 17.II.2010, ( IBSP 165987); 1♂, 17.II.2010, ( IBSP 165988); 1♂, 18.II.2010, ( IBSP 165989); 1♂, 17.II.2010, ( IBSP 165992); 1♀, 18.II.2010, ( IBSP 165993), all collected by L.D. Battirola; Mato Grosso do Sul: Corumbá, Subregiões Miranda e Abobral, Passo do Lontra (19°57'54”S; 57°03'72”W), 1♂, VI.1998 – XI.1999, J. Raizer et. al. leg. ( IBSP 121634); Rio Grande do Sul: Garabi, Usina Hidrelétrica de Garabi (27°32'S; 50°51'W), 1♂ ( MPUC); 2♂, XI.1988 ( MPUC); São Borja (28°11’3”S; 55°38’19”W), 1♂, 28.I.2012, M. Machado leg. ( IBSP 165984). PARAGUAY, Bella Vista: Departamento Amambay, Estancia Apamí (22°07'48"S; 56°31'12"W), 2♀, 7.XI.1983, J.A. Kochalka leg. ( IBNP). ARGENTINA, Entre Ríos: Ubajay, Parque Nacional El Palmar (31°51'11"S; 58°19'21"W), 1♂, 2♀, XI.1988, Galiano leg. ( MACN); Corrientes: Santiago de Alcorta (28°78.8'58.3"S; 58°70.0'78.4"W), 2♀, VI.1943, Birabén leg. ( MACN); Santa Fé: El Rabón (28°13'17.70”S; 59°16'4.05”W), 1♀, Keya leg. ( MLP 15048); Misiones: San Javier (27°52'17"S; 55°08'17"W), 1♂, IV.1946, G. leg. ( MLP).

Distribution. North, Midwest and South Brazil, Northeast Paraguay, North and Northeast Argentina ( Fig. 16 A).

Figures

FIGURE 6. Xiruana pocone 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 0.5 mm; B 0.3 mm; C 0.1 mm; H 0.25 mm.

FIGURE 16. Known distribution of Xiruana species.