Los descendientes de Rin Rin

Ranas y sapos de Colombia. Juan Manuel Renjifo. Editorial Colina, Medellín, 1999, 160 págs

Presence and Distribution of Leptodactylus Guianensis Heyer and de Sa, 2011 in Colombia: Comparisons with Other Species in the L. Latrans Group.

Leptodactylus guianensis is reported for the first time for Colombia along with a distributional map of the species. The species is the fifth species of the L. latransspecies group documented in the country. Males possess a single, conical and slightly chisel-shaped thumb spine; only three species in the group have a single thumb spine. In collections, specimens of L. guianensis are misidentified as L. macrosternum, L. latrans or L. bolivianus. We provide morphological, colouration and habitat descriptions for where the species occurs in Colombia

Nota sobre las diferencias en coloración de dos poblaciones de la ranita Dendrobates truncatus (anura: Dendrobatidae)

The frogs of the family Dendrobatidae, a group restricted to tropical America, are characterized by their colorful and marked polymorphism. The colorful colorations of the individuals of this family are based on the combination of the colors black, red, orange blue, yellow, among others, and have been associated with the toxicity of the chemical compounds (alkaloids) present in the skin. Keywords: Anuros, Dentrobates, alkaloids.Las ranas de la familia Dendrobatidae, grupo restringido a la América tropical, se caracteriza por su vistoso colorido y marcado polimorfismo. Las vistosas coloraciones de los individuos de esta familia se basan en la combinacion de los colores negro, rojo, naranja azul, amarillo, entre otros, y han sido asociados a la toxicidad de los compuestos quimicos (alcaloides) presentes en la piel.  Palabras claves: Anuros, Dentrobates, alcaloides

Tres nuevas especies del género atelopus A.M.C. dumeril and bibron 1841 (amphibia: bufonidae) de las partes altas de la cordillera oriental colombiana

Se nominan y describen tres nuevas especies de Atelopus del grupo ignescens (sensu Lynch 1993) de las partes altas, en páramos y bosques nublados, de la Cordillera Oriental colombiana.Tree new species of the genus Atelopus ignescens (sensu Lynch 1993) group are named and described from the high altitudes ofthe cloud forest and paramos of the colombian Cordillera Oriental

Tres nuevas especies del género Atelopus a.m.c. Dumeril & bibron 1841 (Amphibia: Bufonidae) de las partes altas de la Cordillera Oriental Colombiana

<p>Se nominan y describen tres nuevas especies de Atelopus del grupo ignescens (sensu Lynch 1993) de las partes altas, en páramos y bosques nublados, de la Cordillera Oriental colombiana.</p><br><p>Tree new species of the genus Atelopus ignescens (sensu Lynch 1993) group are named and described from the high altitudes ofthe cloud forest and paramos of the colombian Cordillera Oriental.</p

Diversification of the Pristimantis conspicillatus group (Anura: Craugastoridae) within distinct neotropical areas throughout the Neogene

Supplemental material for this article can be accessed here: https://doi.org/10.1080/14772000.2022.2130464International audienceDetermining the relative importance of dispersal and vicariance events across neotropical regions is a major goal in biogeography. These events are thought to be related to important landscape changes, notably the transition of Amazonia toward its modern hydrological configuration ca. 10 million years ago. We investigated the spatio-temporal context of the diversification of one of the major lineages of Pristimantis, a widespread and large genus of direct-developing Neotropical frogs. We gathered a spatially and taxonomically extensive sampling of mitochondrial DNA sequences from 754 Pristimantis gr. conspicillatus specimens, which led to delimiting 75 Operational Taxonomic Units (OTUs). Complete mitogenomes of 35 of these OTUs were assembled and collated with two nuDNA loci to reconstruct a time-calibrated phylogeny. We identified five major clades that diverged around the Oligocene-Miocene transition and that are largely restricted to distinct Neotropical regions i.e. Western Amazonia (P. conspicillatus clade), the Brazilian Shield (P. fenestratus clade), the Atlantic Forest (P. ramagii clade), the Guiana Shield (P. vilarsi clade) and the northern Andes (P. nicefori clade). The majority of the diversification events within these clades occurred in-situ from the early Miocene onward. Yet, a few ancient dispersal/vicariance events are inferred to have occurred among trans-Andean forests, the Atlantic Forest, the Brazilian and the Guiana Shields, but almost none in the last 10 Ma. The radical landscape transformations during the Miocene caused by the Andean orogeny and hydrological barriers such as the Pebas System and the subsequent transcontinental configuration of the Amazon drainage is a likely explanation for the isolation of the different clades within the P. gr. conspicillatus

Diversification of tiny toads (Bufonidae: Amazophrynella ) sheds light on ancient landscape dynamism in Amazonia

International audienceAbstract Major historical landscape changes have left significant signatures on species diversification. However, how these changes have affected the build-up and maintenance of Amazonia’s megadiversity continues to be debated. Here, we addressed this issue by focusing on the evolutionary history of a pan-Amazonian toad genus that has diversified throughout the Neogene (Amazophrynella). Based on a comprehensive spatial and taxonomic sampling (286 samples, all nominal species), we delimited operational taxonomic units (OTUs) from mitochondrial DNA sequences. We delimited 35 OTUs, among which 13 correspond to nominal species, suggesting a vast underestimation of species richness. Next, we inferred time-calibrated phylogenetic relationships among OTUs based on complete mitogenomic data, which confirmed an ancient divergence between two major clades distributed in eastern and western Amazonia, respectively. Ancestral area reconstruction analyses suggest that the Andean foothills and the Brazilian Shield region represent the ancient core areas for their diversification. These two clades, probably isolated from one other by lacustrine ecosystems in western Amazonia during the Miocene, display a pattern of northward and eastward dispersals throughout the Miocene‒Pliocene. Given the ecological association of Amazophrynella with non-flooded forests, our results reinforce the perception that ancient Amazonian landscape changes had a major impact on the diversification of terrestrial vertebrates

Biodiversidad 2014. Reporte de Estado y Tendencias de la Biodiversidad Continental de Colombia

Biodiversidad 2014 es el resultado de esfuerzos importantes de análisis científico, como también de coordinación nacional de información e inventario sobre la biodiversidad en Colombia y representa un adelanto en la manera de presentar datos sobre el estado de la biodiversidad, su localización y los factores de cambios, presentando escenarios posibles de sus tendencias futuras. Esto implica nuevos enfoques para la gestión ambiental, que puedan aportar nuevas formas de desarrollo que no impliquen la pérdida de las especies o los ecosistemas que habitan.Bogotá, D. C