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Juan Guayasamin
The University of Kansas
United States of America
6 articles by this author
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Research Article
Leaving no stone unturned: three additional new species of Atractus ground snakes (Serpentes, Colubridae) from Ecuador discovered using a biogeographical approach
    Alejandro Arteaga,     Amanda Quezada, Jose Vieira, Juan M. Guayasamin
10.3897/zookeys.1121.89539
 15-09-2022
 Unique: 1214 | Total: 1530  | Access Period:
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 175-210
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Research Article
Systematics of South American snail-eating snakes (Serpentes, Dipsadini), with the description of five new species from Ecuador and Peru
    Alejandro Arteaga,     David Salazar-Valenzuela, Konrad Mebert, Nicolás Peñafiel, Gabriela Aguiar,     Juan C. Sánchez-Nivicela,     R. Alexander Pyron, Timothy J. Colston,     Diego F. Cisneros-Heredia, Mario H. Yánez-Muñoz,     Pablo J. Venegas, Juan M. Guayasamin,     Omar Torres-Carvajal
10.3897/zookeys.766.24523
 14-06-2018
 Unique: 8333 | Total: 15201  | Access Period:
 Reprint: € 20,00
 79-147
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Research Article
A marvelous new glassfrog (Centrolenidae, Hyalinobatrachium) from Amazonian Ecuador
Juan M. Guayasamin,     Diego F. Cisneros-Heredia,     Ross J. Maynard, Ryan L. Lynch, Jaime Culebras, Paul S. Hamilton
10.3897/zookeys.673.12108
 12-05-2017
 Unique: 13345 | Total: 24092  | Access Period:
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 1-20
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Research Article
Molecular phylogeny of Atractus (Serpentes, Dipsadidae), with emphasis on Ecuadorian species and the description of three new taxa
    Alejandro Arteaga, Konrad Mebert, Jorge H. Valencia,     Diego F. Cisneros-Heredia, Nicolás Peñafiel,     Carolina Reyes-Puig, José L. Vieira-Fernandes, Juan M. Guayasamin
10.3897/zookeys.661.11224
 15-03-2017
 Unique: 4964 | Total: 11763  | Access Period:
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 91-123
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Research Article
Systematics of Nothopsini (Serpentes, Dipsadidae), with a new species of Synophis from the Pacific Andean slopes of southwestern Ecuador
    R. Alexander Pyron, Juan M. Guayasamin, Nicolás Peñafiel, Lucas Bustamante,     Alejandro Arteaga
10.3897/zookeys.541.6058
 01-12-2015
 Unique: 4881 | Total: 10969  | Access Period:
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 109-147
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Research Article
A new species of Andean toad (Bufonidae, Osornophryne) discovered using molecular and morphological data, with a taxonomic key for the genus
Diego Paez, Juan Guayasamin, Mario Yanez
10.3897/zookeys.108.1129
 17-06-2011
 Unique: 7768 | Total: 10675  | Access Period:
 Reprint: € 8,00
 73-97
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