Orinomana viracocha, Grismado, Cristian J. & Rubio, Gonzalo D., 2015

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 : 210

Orinomana viracocha new species

( Figs. 2 E–F, 6D–F)

Types. Female holotype and three females paratypes from Peru, Río Lurín, near Lima, 50 m, leg. Weyrauch (Exline - Peck collection donated to CAS), deposited in CAS.

Etymology. Noun in apposition. Named after Viracocha , the god of creation for the Incas.

Diagnosis. Females of O. viracocha are distinguished by other congeneric species by the shape of the epigynum: two short lobes united at middle by a membranose lamina that point backwards ( Fig. 6 D). It is also clearly separate by the broad area connecting the anterior and posterior spermathecae ( Fig. 6 F).

Description. Female (holotype): Total length 2.80, carapace length 1.02, sternum length 0.74, abdomen height 1.94. Leg I: femur length 1.40, tibia length 0.92, metatarsus length 1.04, tarsus length 0.44. Carapace light brown with a medial dorsal yellowish stripe between median eyes and posterior prosoma’s margin, along two broad, diffuse, lighter paraxial bands; two irregular dark spots posterior to the fovea, diverging to the front. Eyes on whitish yellow areas; thin radial dark lines at sides ( Fig. 2 E). Chelicerae, labium and endites distally yellowish, proximally light brown. Sternum light brown with slightly darker margins. Legs yellowish with irregular brown bands, this dark pigment is more extensive in prolateral surfaces of femora-patellae-tibiae I. Abdomen very high, yellowish, with a cardiac brown band; two tenuous transversal dark bands posterior to the humps, humps quite separate; small and sparse spots on sides, slightly more visible on caudal areas. Ventrally uniform yellowish.

Genitalia: Epigynum with two lateral lobes and a median translucent lamina pointing backwards ( Fig. 6 D); two pairs of spermathecae, lacking constriction between anterior and posterior ones, that are broadly connected; copulatory ducts lead to the anterior spermathecae ( Fig. 6 F).

Variability: Two female specimens show abdomen not so high, generally darker coloration, with more conspicuous pattern in legs, sternum dark brown with light spots, darker dorsum and sides marbled nevertheless, the carapace design is identical to those of the holotype.

Material examined. Only the type series.

Distribution. Only known from the type locality, in Lima, Peru.

Figures

FIGURE 2. Habitus of Orinomana spp. A – D, O. penelope new species. E – F, O. viracocha 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.