Orinomana Strand, 1934

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 : 203

Orinomana Strand, 1934

Orinomus [preoccupied] Chamberlin 1916: 206. Type species by original designation and monotypy O. lamprus Chamberlin, 1916 , op. cit.

Orinomana Strand 1934: 273 . New name for Orinomus Chamberlin 1916 , preoccupied. Opell 1979: 498.

Note. The type species, Orinomus lamprus was synonymized by Opell (1979) with Uloborus bituberculatus Keyserling, 1882 .

Diagnosis. Orinomana species share with those of Waitkera Opell, 1979 , Sybota , Miagrammopes and Hyptiotes , the PLE on prominent tubercles; differ from Miagrammopes in having anterior eyes, from Hyptiotes in lacking the anterior cephalic narrowness ( Opell 1979, fig. 55), and from the remaining two genera by having a peaked, humped abdomen ( Figs. 2 B; Opell 1979, fig. 122; Grismado 2000, figs. 2, 7) rather than oval or projecting ( Opell 1979, figs. 24, 102, 110, 116; Grismado 2001, fig. 3). Orinomana females have entelegyne genitalia, while Waitkera is haplogyne, and Sybota is intermediate between the two conditions ( Grismado 2001). Males are easily recognized by the complex, branched embolus (Figs. 1, 3, 7).

Description. For female see Opell (1979). Male: carapace oval,>1.1 times longer than wide, ocular area not elevated from carapace. Both eye rows recurved, MOQ near 1.6 times longer than wide, ocular area occupying almost 80% of cephalic width. Eyes subequal, except the ALE, the smallest; PME separated by about three times their diameter; clypeus height>1.6 times the AME eyes diameter. Legs: femora I around 1.5 times the carapace length; macrosetae of legs I: femora: 2 prolateral, 4 ventral prolateral; tibiae: 2 retrolateral, 2 prolateral, 3–4 dorsal prolateral, 2 dorsal; metatarsi: 3 prolateral, 3–4 retrolateral. Abdomen with two conspicuous anterodorsal humps. For coloration, see species descriptions.

Palp: tibiae unmodified, cymbium distally notched. Bulb: subtegulum discoidal, tegulum as an apparently incomplete ring, leaving a ventral area less sclerotized; its retrolateral side with a differently wrinkled texture. On the prolateral side articulates the small median apophysis, conductor distally articulated, larger than the MA. Embolus highly modified, with 3–4 branches to different directions. For specific details, see under species descriptions.

Composition and distribution. Seven known species from western South America, mostly in Andean regions (Fig. 9): O. florezi n. sp. from Colombia, O. penelope n. sp. from Ecuador, O. bituberculata (Keyserling 1881) from Peru and Ecuador, O. viracocha n. sp. from Peru, O. mana Opell 1979 from northern Chile, and O. galianoae Grismado 2000 , and O. ascha Grismado 2000 from northwestern Argentina.

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.