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On the occurrence of facultative paedomorphosis in the three newt species of Southern Iberian Peninsula (Amphibia, Salamandridae)

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We report the occurrence of facultative paedomorphosis in the three species of newts (Pleurodeles waltl, Lissotriton boscai and Triturus pygmaeus) from dry and seasonal Mediterranean areas from southern Spain. These are the first records of paedomorphosis for P. waltl and L. boscai, and the second for T. pygmaeus. Other than the previous T. pygmaeus record, these are the first observations of paedomorphosis in the southern half of the Iberian Peninsula. Most of specimens demonstrating paedomorphosis live in artificially permanent aquatic environments. Nevertheless, a paedomorphic individual of L. boscai was found in a natural yearly temporary brook that held water during the previous two years. Paedomorphs are at low frequency in most cases. However, a single isolated population of P. waltl is probably composed entirely of paedomorphs.

Affiliations: 1: Departamento de Ciencia y Tecnología Agroforestal y Genética, ETSIA, UCLM, Campus Universitario s/n, 02071 Albacete, Spain;, Email:; 2: Calle Mar Egeo 7, 11407 Jerez de la Frontera, Spain; 3: Departamento de Biología Animal, Biología Vegetal y Ecología. Campus de las Lagunillas s/n, Universidad de Jaén, 23071 Jaén, Spain; 4: Departamento de Fisiología y Zoología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, 41012 Sevilla, Spain; 5: Departamento de Ecología Evolutiva, Estación Biológica de Doñana, CSIC, Avda. Américo Vespucio s/n, 41092 Sevilla, Spain


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