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Mérida, Venezuela

Rojas-Runjaic F.J.M.,Museo de Historia Natural la Salle | Infante-Rivero E.E.,University of Zulia | Barrio-Amoros C.L.,Fundacion AndigenA
Zootaxa | Year: 2011

A new species of diurnal frog of the genus Aromobates is described from the Sierra de Perijá in the Andes of western Venezuela. The new species is the first dendrobatid reported from this mountain range, though many other congeners are known from the Cordillera de Mérida, also in the Venezuelan Andes. It can be readily distinguished from all congeners by the unique combination of the following characters: dorsal skin granulate, paired and protuberant dorsal digital scutes, finger I shorter than finger II, fringes absent on fingers I and IV, present and conspicuous on all toes, toe webbing basal, dorsolateral stripe present, oblique lateral stripe diffuse, ventrolateral stripe absent. With this new species the number of Aromobates species from Venezuela increases to 13. Copyright © 2011 · Magnolia Press. Source

Barrio-Amoros C.L.,Fundacion AndigenA | Rojas-Runjaic F.,Museo de Historia Natural la Salle | Barros T.R.,University of Zulia
Zootaxa | Year: 2010

Two new species of Pristimantis are described from Cerro Las Antenas, on the Venezuelan versant of the Sierra de Perijá, a region that is being rapidly destroyed by extensive cultivation and civil unrest. The first species (P. lassoalcalai sp. nov.) has dirty-white spots surrounded by black in the groin and on the hidden surfaces of the hind limbs - a characteristic shared by members of the "lentiginosus" group (Rivero 1982) from the Cordillera de Mérida - and marbled to reticulated venter. The second species (P. rivasi sp. nov.) is currently the largest member of the genus known from Perijá, and presents conspicuous cranial crests. The two new species are assigned to the P. unistrigatus species group. Copyright © 2010 Magnolia Press. Source

Schargel W.E.,University of Texas at Arlington | Rivas G.A.,University of Zulia | Makowsky R.,University of Alabama at Birmingham | Senaris J.C.,Museo de Historia Natural la Salle | And 4 more authors.
Systematics and Biodiversity | Year: 2010

The phylogenetic relationships and species boundaries of the diurnal geckos of the genus Gonatodes in the Guayana region are examined. Seven species of Gonatodes are recognized for the region, six of which are endemic to this region and form a monophyletic group together with G. hasemani from the southern part of the Amazon Basin. Two of the six species in this group are new to science, one of which is endemic to Venezuela and it is described here. Taxonomic accounts are provided for all the Venezuelan species of Gonatodes that are endemic to the Guayana region. The phylogenetic relationships of Gonatodes suggest that the diversity of this genus in the Guayana region has resulted mostly from in situ diversification rather than multiple colonization events by different lineages. The phylogenetic analyses also support that G. antillensis, the only nocturnal species in the genus, is indeed nested within Gonatodes, indicating re-evolution of some traits associated with nocturnal life. Finally, we comment on a recently proposed framework of temporal diversification in Gonatodes and suggest that we are still a long way from attaining a complete understanding about the systematics of this genus. © 2010 The Natural History Museum. Source

Faivovich J.,CONICET | Faivovich J.,Sao Paulo State University | Faivovich J.,American Museum of Natural History | Haddad C.F.B.,Sao Paulo State University | And 9 more authors.
Cladistics | Year: 2010

The leaf or monkey frogs of the hylid subfamily Phyllomedusinae are a unique group of charismatic anurans. We present a molecular phylogenetic analysis that includes 45 of the 60 species of phyllomedusines using up to 12 genes and intervening tRNAs. The aims were to gain a better understanding of the phylogenetic position of Phrynomedusa, test the monophyly and explore the relationships among several putative lineages (Hylomantis, the H. buckleyi Group, Phasmahyla, the four species groups of Phyllomedusa, and the species of Phyllomedusa that remain unassigned to any group), and to examine the implications of our phylogeny for the evolution of several characters in phyllomedusines. The analyses resulted in a well-supported phylogenetic hypothesis that provides a historical framework for a discussion of the evolution of characters associated with reproductive biology, gliding behaviour, the physiology of waterproofing, and bioactive peptides. Implications include an earlier origin for eggless capsules than for leaf-folding behaviour during amplexus, two independent origins of gliding, and an earlier origin of reduction in evaporative water loss than uricotelism, which is a result that originally was predicted on the basis of physiology alone. Furthermore, our results support the prediction that bioactive peptides from different peptide families are to be expected in all species of Phyllomedusinae. Hylomantis (as recently redefined) is shown to be paraphyletic and the synonymy of Agalychnis is revised to remedy this problem by including both Hylomantis and Pachymedusa. © The Willi Hennig Society 2009. Source

Barrio-Amorosanj C.L.,Fundacion AndigenA | Santos J.C.,National Evolutionary Synthesis Center | Molina C.R.,Central University of Venezuela
Phyllomedusa | Year: 2010

An addition to the diversity of dendrobatid frogs in Venezuela: description of three new collared frogs (Anura: Dendrobatidae: Mannophryne). Three new species of collared frogs of the genus Mannophryne are described from Venezuela. Two are newly discovered taxa from the Venezuelan Andes, whereas the third species, previously confused with M. trinitatis, is from the Caracas area in the Cordillera de la Costa. The call of the three new species and that of Mannophryne collaris are described. Taxonomic, zoogeographic, and conservation issues are discussed. © 2010 Departamento de Ciências Biológicas - ESALQ - USP. Source

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