Orinomana ascha Grismado, 2000

Grismado, Cristian J. & Rubio, Gonzalo D., 2015, Three new species and the first known males of the Andean spider genus Orinomana Strand (Araneae, Uloboridae), Zootaxa 4052 (2), pp. 201-214 : 212-214

Orinomana ascha Grismado, 2000

( Figs. 5 A–D, 6A–C, 7, 8)

O. ascha . Grismado 1999 (2000): 299, figs. 6–11. Female holotype from Argentina: la Rioja; Arauco Department: Ascha , March 1994, G. Cáceres Freyre leg. (MACN-Ar 2136, examined).

Additional material examined (new records). ARGENTINA: Tucumán: Camping de Cochuna, S 27º19.346' W 65º.55.430' (GPS, +- 10m), elev. 1261 m (GPS), 19 Feb. 2013, selva de yungas, colecta manual nocturna, G.D.Rubio, H.A.Iuri, A.Ojanguren, A. Porta & R. Adilardi (GDR-loc 16), 2 m (MACN-Ar 30760, photos GDR DSC 0023-0066), 1 m (MACN-Ar 30766, prep. CJG 1457, GDR 0328), 1 m (MACN-Ar 30761, photos GDR DSC 0056-0065), 3 f, 1 j (MACN-Ar 30765), 1 j (MACN-Ar 30764), 2 j (MACN-Ar 30763); Río Cochuna, 0 9 Apr. 2011, G.D.Rubio & C.Argañaraz, 2 h (MACN-Ar 30762, prep. GDR 0329).

Diagnosis. Males are distinguished by having three branches in the embolus, by the median apophysis with only one pointed projection, by the conductor pointing to the prolateral side, and a conical, dark protrusion on the center of the tegulum ( Figs. 6 A–C, 7). For females see Grismado (2000).

Description. Male (MACN-Ar 30766): Total length 3.40, carapace length 1.44, sternum length 0.88, abdomen height 1.60. Leg I: femur length 2.32, tibia length 2.12, metatarsus length 2.36, tarsus length 0.76. Carapace brown with a medial dorsal yellowish stripe from the ocular area to back, wider between the posterior median eyes. Dark rings surround the anterior eyes and yellow rings the lateral eyes. Chelicerae, labium and endites distally pale yellow, proximally light brown. Sternum brown with a medial yellowish band. Legs yellowish with irregular, diffused brown bands, this dark pigment is more extensive on femora-patellae-tibiae I. Abdomen very high, brown, with a cardiac dark band between the pedicel and the dorsal humps, and profusely dotted with guanine deposits; posterior to the humps, the light stops are more definitely aligned to, the caudal area. Ventrally brown with the light spots larger than dorsum and sides. Epiandrum region reddish brown. All the body covered by abundant, light setae; on the ventral parts, light setae mixed with black setae.

Palp ( Figs. 6 A–C, 7): As for the genus (see above) in general aspects; tegulum with a remarkable, dark, conical protrusion in the center (black arrows in fig. 7); median apophysis with only one pointed projection; conductor massive, transversely oriented; embolus with three branches, one backwardly looped, ribbon-shaped, that ends touching the embolus origin (b1), one distal, with the ejaculatory duct (b2), and other pointed, forwardly directed (b3).

Variability: Two males have darker general coloration, with guanine deposits more concentrated along paraxial white bands on the dorsum and the venter of abdomen.

Distribution. La Rioja and Tucumán Provinces, Argentina.

Figures

FIGURE 5. Habitus of Orinomana spp. A – D, O. ascha Grismado. E – F, O. florezi new species. A – B, E – F, females. C – D, male. A, D, E, dorsal view. B, C, F, lateral view. Scale bars, 1 mm.

FIGURE 6. Orinomana spp. genital morphology. Palp morphology. A – C, O. ascha Grismado; male left palp. D – I, female genitalia; D – F, O. viracocha new species. G – I, O. florezi new species. A, prolateral view; B, ventral, C, retrolateral; D, G, epigynum, ventral view; E, H, same, posterior view; F, I, vulva, cleared, dorsal view. Scale bars, 0.2 mm.