Biodiversity Literature Repository
Published December 31, 2005 | Version v1
Journal article Restricted

A New Species Of The Genus Oreophrynella (Anura; Bufonidae) From The Guiana Highlands

Creators

  • 1. Museo de Historia Natural La Salle – Apartado 1930, Caracas 1010-A, Venezuela

Description

Señaris, Josefa Celsa, Donascimiento, Carlos, Villarreal, Osvaldo (2005): A New Species Of The Genus Oreophrynella (Anura; Bufonidae) From The Guiana Highlands. Papéis Avulsos de Zoologia 45 (6): 61-67, DOI: 10.1590/s0031-10492005000600001

Files

Restricted

The record is publicly accessible, but files are restricted to users with access.

Linked records

Additional details

Identifiers

LSID
urn:lsid:plazi.org:pub:FFE23D6CE909E9592A5D7F11A935FF95

Related works

Has part
Figure: 10.5281/zenodo.10085857 (DOI)
Figure: 10.5281/zenodo.10085859 (DOI)
Figure: 10.5281/zenodo.10085861 (DOI)

References

  • of the Roraima chain (Senaris et al., 1994), or O. cryptica
  • The bufonid genus Oreophrynella is one of the and O. huberi from Auyan-tepui and Cerro El Sol, most characteristic components of the anurofauna of respectively (Senaris, 1995). However, this proposal the Guiana Region. McDiarmid (1971) considered does not seems totally explain the distributions of Oreophrynella a very specialized frog, restricted to the O. macconneli and O. weiassipuensis, the latter very similar Guiana Shield. The genus currently consists of seven to O. cryptica and O. huberi. Oreophrynella cryptica, O. huberi, species, five inhabiting the summits and slopes of the and O. weiassipuensis share well developed cranial crests Roraima chain (O. macconnelli, O. nigra, O. quelchii, (restricted to the post orbital area in O. weiassipuensis) O. vasquezi, and O. weiassipuensis) and the remaining two (Figs. 5D-F) and less tuberculate dorsal skin than other species (O. cryptica and O. huberi) known from the species. Oreophrynella weiassipuensis and O. huberi share a summits of Auyan-tepui and Cerro El Sol, respectively. reddish dorsal coloration, in contrast with the dark Another undescribed species is known from the brown or black color of the other species. The great northeastern slope of Mount Ayanganna in Guyana similarity between O. cryptica, O. huberi, and (Lathrop and MacCulloch, pers. comm.). O. weiassipuensis suggests a possible relationship between
  • Rivero (1970) and Hoogmoed (1979) postulated them. However, we are uncertain about the presumed that Oreophrynella derived from a paleo-fauna that derived condition of these two characters and any evolved in an ancient sandstone plain during the conclusion about the relationships of Oreophrynella Mesozoic or Tertiary, followed by intensive erosional species is merely speculative at this point. dissection (Plateau Theory). Besides its origin, Senaris Most species of Oreophrynella are endemic to a et al. (1994) discussed the great morphological similarity single mountain, except O. nigra which occurs on both between neighboring species of the Roraima chain Kukenan-tepui and Yuruani-tepui (Gorzula and summits and considered the lowering of South Senaris, 1999; Magdefrau and Magdefrau, 2000; American tropical temperature during the glacial McDiarmid and Gorzula, 1989; Senaris et al. 1994) and periods in the Pleistocene (Van der Hammen, 1974) as O. quelchii from Roraima and Wei-Assipu-tepui a possible cause of the descent of the lower limit of (Villarreal et al., 2002). Roraima and Wei-Assipu-tepui the highland tepui ecosystems to at least 500 m below are very close (2.5 km between summits) and linked its present location, allowing contact between different by a ridge of medium altitude. Kukenan and Yuruani Oreophrynella populations for hybridization and/or are also in close proximity to each other (3.5-4 km). genetic flux, followed by a period of speciation. This Myers and Donnelly (2001) suggested a past faunal theory would explain the resemblance among O. quelchii, interchange by a system of ridges connecting the ba-