Jorge Valencia

Jorge Valencia
Institute of Ecology INECOL | INECOL

PhD student
Advanced Molecular Studies Network

About

61
Publications
48,186
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259
Citations

Publications

Publications (61)
Article
Full-text available
This article presents an update of the geographic distribution of the indigo snake Drymarchon corais in the Ecuadorian Amazon. The data presented was obtained from the review of historical records, collection of specimens in the field, review of specimens in zoological collections, information from field researchers, and review of open access datab...
Article
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Morphology and distribution of the South American snake Chironius leucometapus (Serpentes: Colubridae). Chironius leucometapus was described more than 25 years ago as subspecies of C. fuscus from restricted area in the Department of Junín in central Peru, with no additional specimens reported since. Examination of 17 new specimens reveals that C. l...
Article
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A new frog of the genus Pristimantis is described from a montane cloud forest at 9 de Octubre (2°14’52” S, 78°16’37” W; 1778 m) province of Morona Santiago in the upper basin of the Upano River, southeastern Ecuador. The description of the new species is based on the examination of eleven adult males and three adult females. The new taxon can be re...
Article
Aim: A poorly explored feature of the origin and maintenance of Neotropical biodiversity is how the evolutionary dynamics of colonization and differentiation in relation to lowland and highland habitats has impacted lineage formation. Most speciation models for this region have focused on vicariant events, whereas the need to assess the influence o...
Article
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Reproductive behavior and development in Spilotes sulphureus (Serpentes: Colubridae) from Ecuador. The Birdsnake Spilotes sulphureus is a large-sized species that occurs from the Amazon region to the Atlantic forest of South America. Despite the wide distribution little is known about its natural history. Here we report, for the frst time, reproduc...
Article
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It was officially delivered on December 2016 and it had an Award, to the best publication of the 2016 year, in the field of Biological Sciences, for its contribution at the local and regional level. This book fills a knowledge gap on the 36 species of venomous snakes known to occur in Ecuador (VIPERIDAE and ELAPIDAE fAMILY). It is a compilation of...
Article
Full-text available
A new frog in the genus Pristimantis is described from a cloud forest on the western flanks of the Cordillera del Cóndor and eastern Andean slopes in the province of Zamora Chinchipe, southeastern of Ecuador. We inferred its phylogenetic position using DNA sequences of mitochondrial and nuclear genes. The new species is strongly supported as part o...
Article
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Problems associated with delimiting species are particularly pronounced in taxa with high species-level diversity, as occurs in Pristi ti frogs. Herein, we resurrect Pristimantis brevicrus, nov. comb., from the synonymy of P. altamazonicus, a widespread species in the upper Amazon Basin, based on morphological, acoustic and genetic evidence. Both s...
Article
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We present a molecular phylogeny of snake genus Atractus, with an improved taxon sampling that includes 30 of the 140 species currently recognized. The phylogenetic tree supports the existence of at least three new species in the Pacific lowlands and adjacent Andean slopes of the Ecuadorian Andes, which we describe here. A unique combination of mol...
Article
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We present an analysis of the diversity of snakes of Quito Metropolitan District, northern Ecuador. For this study, we conducted field work, examined material deposited at museums, and reviewed relevant literature. We found evidence of 41 species of snakes at Quito Metropolitan District, including members of the families Colubridae (31 spp.), Elapi...
Article
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Pluralistic approaches to taxonomy facilitate a more complete appraisal of biodiversity, especially the diversification of cryptic species. Although species delimitation has traditionally been based primarily on morphological differences, the integration of new methods allows diverse lines of evidence to solve the problem. Robber frogs (Pristimanti...
Article
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We describe a new species of Philodryas from the highlands of southern Ecuador. The new species is distinguished from all known species of Philodryas by a unique combination of coloration, scalation, and hemipenial characters. The new species resembles Philodryas simonsii in color pattern. However, they differ notoriously by their hemipenial morpho...
Article
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We describe a new species of Siphlophis from the Amazonian slopes of the Ecuadorian Andes, in the provinces of Azuay, Tungurahua, and Zamora Chinchipe. This is the third species of Siphlophis known from Ecuador and the seventh species in the genus. The new species of Siphlophis is distinguished from all other Siphlophis by characters of external mo...
Article
Full-text available
We describe a new species of Atractus from Cordillera de los Guacamayos in the Andes of Ecuador. This new species is the largest known species of Atractus, reaching almost 120 cm in total length with a robust habitus. We also use multivariate statistical analyses of morphometric data to look into the taxonomic confusion involving other large, bande...
Article
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Many snakes are able to use their chemosensory system to detect scent of conspecifics, which is important in many social contexts. Age discrimination based on chemical cues may be especially important to ensure access to sexually mature potential partners. In this study, we used 24 individual Boa constrictor snakes (12 adults mature and 12 non-matu...
Article
Full-text available
Most snakes have the chemosensory ability to identify chemical cues from conspecifics, which is useful in many social and sexual behaviors. This has been especially well studied in European and North American snake species. In contrast, there is a general lack of knowledge on the biology and especially on the use of chemical signals by most Neotrop...
Article
Full-text available
We describe a new species of Pristimantis from evergreen lowland forest in the Amazon Basin of Ecuador. We observed all specimens to be active at night, located over leaves of shrubs in both primary forest and in the edge of forest clearings. The new species is tentatively assigned to Pristimantis (Pristimantis) frater group based on its small size...
Article
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The name Herpetodryas reticulata Peters, 1863, is revalidated and assigned to the snakes of the genus Mastigodryas from the dry forests of central and southwestern Ecuador. Mastigodryas reticulatus (Peters, 1863) is characterized by the presence of a striped dorsal pattern, with the upper light lateral stripe formed by two scale rows (4 and 5); dor...
Article
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Porthidium arcosae (SCHÄTTI & KRAMER, 1993) is a terrestrial, small-sized (ca. 720 mm total length), rare and little studied pitviper endemic to Ecuador, occurring in a variety of dry xeric forests, in the province of Manabí. Specimens preserved in collections and observations of snakes in captive conditions yielded new information about its natura...
Article
Full-text available
Porthidhon arcosae (SCHATTI & KRAMER, 1993) is a terrestrial, small-sized (ca. 720 mm total length), rare and little studied pitviper endemic to Ecuador, occurring in a variety of dry xeric forests, in the province of Manabi. Specimens preserved in collections and observations of snakes in captive conditions yielded new information about its natura...
Article
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Recientemente, Valencia et al. [1] describimos una nueva especie de Pristimantis de las estribaciones noroccidentales de Ecuador. Sin embargo, cometimos un error al utilizar un epíteto específico previamente ocupado para una rana de las estribaciones occidentales y orientales de Antioquia, Colombia [2]. Según el Capítulo 12, Artículo 53.3 del Códig...
Article
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Describimos una nueva especie de rana del diverso género Pristimantis. La nueva especie se caracteriza principalmente por tener una coloración dorsal verde con manchas rojizas, rostro acuminado con papila en la punta, tubérculos cónicos ulnares y tarsales, y por la ausencia de crestas craneales. La especie se distribuye en la vertiente noroccidenta...
Article
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The Upper Amazon Basin is located closer to Andes along the Equator, at eastern lowlands of Colombia, Ecuador and Peru, which receives one of the highest levels of rainfall within all lowland Amazonia (Vigle 2008). These environmental conditions seem to favor the presence of the highest known species richness and complex herpetological communities...
Data
Durante los últimos años se ha detectado una declinación poblacional de anfibios a nivel global. En los Andes de Ecuador se han reportado al menos 24 especies en proceso de declinación o extinción a partir de la década de 1980 (Bustamante et al. 2005 *), generalmente atribuidos a procesos de fragmentación de hábitats, cambio climático global, surgi...
Book
Full-text available
Se presentan datos sobre la biodiversidad herpetofaunística en dos sectores de la Región Amazónica Ecuatorian.
Article
Full-text available
We describe a new species of Enyalioides from lowland cloud forests in southwestern Ecuador. This represents the third species in the genus known to occur west of the Andes in South America; the other two species are E. heterolepis and E. oshaughnessyi. Among other characters, the new species can be distinguished from other members in the genus by...

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Projects

Projects (2)
Project
to study the fantastic variation of amphibians and reptiles of Latin America, including shape, color pattern, behavior and aspects ecology/natural history
Project
Bothropoids are a highly diverse group of pitvipers whose phylogeny is not yet sufficiently clear given the uncertain, unclear or conflicting position of many species. Our goal is to assess the contribution of new data and an increased taxon sampling for the outgroup on clarifying the phylogeny of bothropoids. New data includes new morphological and molecular characters, additional data of poorly known species, data of species described recently, and data of putative new species.