Guadana quillu, Rheims, 2010

Rheims, Cristina Anne, 2010, A new genus of huntsman spiders from the Neotropical region (Araneae: Sparassidae: Heteropodinae), Zootaxa 2650 (1), pp. 33-46 : 41-42

Guadana quillu sp. nov.

Figs 24–28 , 39

Type material: Holotype: ♂ from Tiputini Biodiversity Station , near Yasuni National Park [00°37’ S; 76°08’ W], Erwin Transect T/1 Sta. 1, lot 2020, 8 February 1999, T. L. Erwin et al. leg. (EPNC, temporarily in USNM) . Paratypes: 1♀, same locality and collector as holotype, 1 July 1998, lot 1852 (USNM) ; 1♀, same locality and collector, 22 October 1998, lot 1967 (USNM) ; 1♂, same locality and collector, 9 February 1999, lot 2013 (USNM) ; ♂ from Reserva Etnica Waorani, Transect Ent. 1km S. Onkone Gare Camp [00°39' S; 76°27'W], Orellana, Ecuador, 1 October 1996, T. L. Erwin leg., lot 1698 (USNM) ; ♂, same locality and collector, 21 June 1994, lot 692 (USNM) ; ♂, same locality and collector, 23 June 1996, lot 1603 (USNM) ; 1♀, same locality and collector, 25 June 1994, lot 727 (USNM) ; 1♀, same locality and collector, 25 June 1996, lot 1526 (USNM) ; 1♀, same locality and collector, 8 February 1996, lot 1479 (USNM) ; 1♂, same locality and collector, 7 October 1994, lot 890 (IBSP 150152) ; 1♀, same locality and collector, 2 July 1995, lot 1061 (IBSP 150153) .

Additional material examined. ECUADOR. Orellana: 5♂, 10♀, Tiputini Biodiversity Station, near Yasuni National Park , Erwin Transect T/1 Sta. 1 [00°37' S; 76°08'W] (USNM) ; 5♂, 6♀, 1 juvenile, Reserva Etnica Waorani, Transect Ent. 1km S. Onkone Gare Camp [00°39' S; 76°27'W] (USNM).

Etymology. The specific name is a non-Latin adjective (unchangeable), taken from the Quichua language, that means “yellow” and denotes the general coloration pattern of the specimens.

Diagnosis. Guadana quillu sp. nov. is distinguished from the remaining species of the genus by the male palp with dorsal branch of the RTA bifid and DTA strongly ridged ( Figs 24–25 ) and by the female epigynum with median septum wider than long with latero-posterior flaps and rimmed epigynal ledges ( Fig. 26 ).

Description. Male (USNM, paratype, lot 1698): Dorsal shield of prosoma orange, with pale brown markings laterally and along thoracic striae, and two irregular, pale brown marks at the base of cephalic region. Eye borders black. Chelicerae yellow with brown spots at the base of setae. Pedipalps pale yellow. Legs pale yellow with large brown spots at the base of spines and smaller spots at the base of setae on femora. Sternum pale yellow with pale orange margins. Labium and endites pale orange. Opisthosoma pale yellow. Dorsally with two pairs of brown, rounded muscular impressions. Total length 10.6. Prosoma: 4.8 long, 5.2 wide. Opisthosoma: 5.8 long, 3.8 wide. Eye diameters: 0.30, 0.34, 0.22, 0.40; interdistances: 0.16, 0.02, 0.36, 0.36, 0.36, 0.34. Legs: I: 36.6 (9.0, 2.6, 10.4, 11.0, 3.6); 39.0 (10.0, 2.6, 11.6, 11.0, 3.8); III: 25.2 (7.0, 2.4, 6.6, 6.8, 2.4); IV: 28.0 (7.6, 2.0, 6.4, 8.6, 3.4). Spination follows the generic pattern except tibia IV: d0; metatarsus III: p1-1-0; r1-1-0; metatarsus IV: r1-1-1. Palp: VTA almost retrolateral; RTA with ventral branch conical and strongly pointed; embolus slightly curved retrolaterally with pointed projection and curved laminar projection at tip; conductor long and slender ( Figs 24–25 ).

Female (USNM, paratype, lot 1967): Coloration pattern as in male, slightly lighter. Total length 11.4. Prosoma: 5.0 long, 5.4 wide. Opisthosoma: 6.4 long, 4.8 wide. Eye diameters: 0.26, 0.32, 0.22, 0.34; interdistances: 0.24, 0.08, 0.46, 0.42, 0.42, 0.38. Legs: I: 25.8 (7.4, 2.6, 7.4, 6.2, 2.2); II: 28.4 (8.4, 2.6, 8.2, 6.8, 2.4); III: 20.8 (6.2, 2.0, 5.4, 5.2, 2.0); IV: 22.2 (6.2, 2.2, 5.8, 5.8, 2.2). Spination follows the generic pattern. Epigynum: epigynal field wider than long ( Fig. 26 ). Vulva: copulatory ducts slightly curved, extending posteriorly to small, slightly elliptical spermathecae; fertilization ducts very short, pointing anteriorly ( Figs 27–28 ).

Variation. Males (n = 10): total length 8.2–11.2; prosoma 4.4–5.2; femur I 8.4–9.8. Females (n = 10): total length 11.0–13.6; prosoma 4.6–5.8; femur I 6.4–7.6.

Distribution. Only known from Orellana, Ecuador ( Fig. 39 ).

(26 epigynum, ventral view; 27 vulva, dorsal view); 28. Schematic course of internal duct system. Scale lines: 0.5 mm.

Figures

FIGURE 39. Distribution records for the species of Guadana gen. nov.

FIGURES 24–28. Guadana quillu sp. nov. 24–25 Male, left palp (24 ventral, 25 retrolateral view); 26–27 Female