IUCN threat status:

Least Concern (LC)

Comprehensive Description

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Description

Snout-vent length in this species is usually from 40 to 70 mm, but sometimes is longer than 10 cm (Docampo and Milagrosa-Vega 1988; González de la Vega 1988). The head is as long as wide, with prominent eyes located in dorsal position very close to each other. The tympanum is well marked, about 1/2 to 3/4 the eye diameter (Salvador and García-París 2001). Toes have well developed webbing. Skin is either smooth or slightly rough, with well-formed dorsolateral folds. The dorsal coloration is very variable, usually green but also brown or grayish to dark gray. They usually show a vertebral stripe, mostly yellow or green. Two irregular rows of dark, rectangular spots are present on both sides of the vertebral stripe. These spots are also present on the rear limbs, sometimes forming a banded pattern. Some individuals lack both the spots and the vertebral stripe. Ventrally they are white with a variable number of dark spots.Males are smaller than females and have stronger forelimbs. They have gray vocal sacs than can be appreciated even when they are not in use.Tadpoles grow up to 111 mm total length (Salvador 1985), but usually measure between 60-70 mm (Barbadillo et al. 1999). The spiracle is sinistral and the anus open on the right side of the base of the tail. Marginal papillae are absent from the upper side of the mouth. Denticles are arranged in a variable number of single rows (Llorente et al. 1994), but the most common formula is 2(2)/3(1). The dorsal fin is low, starting at the level of the spiracle. The tip of the tail is pointed. Ground coloration is green or light brown, with small, dark dots. These dots are denser and larger in the tail fin. The tail presents a typical pattern with three longitudinal dark stripes. The ventral coloration is white.

In southern France and northeastern Spain is present Rana Kl. grafi Crochet, Dubois, Ohler and Tunner, 1995, the klepton associated with Rana perezi. This hybridogenetic species was originated by hybridization between Rana perezi and R. ridibunda (Graf et al. 1977; Uzzell and Tunner 1983; Arano et al. 1995).

Go here to view a Spanish account for Rana iberica.

References:

Arano, B., Llorente, G., García-París, M. and Herrero, P. (1995). Species translocation menaces Iberian Waterfrogs. Conservation Biology, 9(1): 196-198.

Barbadillo, L.J., Lacomba, J.I., Pérez Mellado, V., Sancho, V. and López-Jurado, L.F. (1999). Anfibios y reptiles de la Península Ibérica, Baleares y Canarias. GeoPlaneta S.A. Barcelona. 419 pp.

Docampo, L. and Milagrosa-Vega, M. (1988). Aplicación de un método estadístico al dimorfismo sexual del crecimiento relativo de Rana perezi (Seoane, 1885). Cuadernos de Investigación Biológica, 13: 53-65.

Esteban, M., García-París, M. and Castanet, J. (1996). Use of bone histology in estimating the age of frogs (Rana perezi) from a warm temperate climate area. Canadian Journal of Zoology, 74(10): 1914-1921.

García-París, M. (1985). Los anfibios de España. Ministerio de Agricultura, Pesca y Alimentación. Madrid. 287 pp.

García-París, M. (1997). Rana perezi Seoane, 1885. In: Atlas of amphibians and reptiles in Europe. Gasc, J. P., Cabela, A., Crnobrnja-Isailovic, J., Dolmen, D., Grossenbacher, K., Haffner, P., Lescure, P., Martens, H., Martínez-Rica, J.P., Maurin, H., Oliveira, M.E., Sofianidou, T.S., Veith, M. y Zuiderwijk, A. (Eds.). Societas Europaea Herpetologica et Muséum National d’Histoire Naturelle. Paris: 152-153.

Godinho, R., Teixeira, J., Rebelo, R., Segurado, P., Loureiro, A., Álvares, F., Gomes, N., Cardoso, P., Camilo-Alves, C. and Brito, J.C. (1999). Atlas of the continental Portuguese herpetofauna: an assemblage of published and new data. Revista Española de Herpetología, 13: 61-81.

González de la Vega, J.P. (1988). Anfibios y reptiles de la provincia de Huelva. ERTISA. Huelva. 237 pp.

Graf, J. D., Karch, F. and Moreillo, M. C. (1977). Biochemical variation in the Rana esculenta complex: a new hybrid form related to Rana perezi and Rana ridibunda. Experientia, 33: 1582-1584.

Llorente, G.A., Arano, B., García Serra, N. and Civantos, E. (1995). Extreme variability in the oral morphs of Rana perezi larvae: their dubious application in the diagnosis of the P-RP system. Revista Española de Herpetología, 9: 85-91.

Llorente, G.A., Montori, A., Carretero, M.A. and Santos, X. (2002). Rana perezi, En: Atlas y libro rojo de los anfibios y reptiles de España. Pleguezuelos, J.M., Márquez, R. y Lizana, M. (Eds.). Dirección General de la Conservación de la Naturaleza-Asociación Herpetológica Española. Madrid: 126-128.

Pleguezuelos, J. M., Márquez, R. and Lizana, M. (eds.) (2002). Atlas y Libro Rojo de los Anfibios y Reptiles de España. Dirección General de Conservación de la Naturaleza-Asociación Herpetológica Española (2ª impresión), Madrid, 587 pp.

Salvador, A. and García-París, M. (2001). Anfibios Españoles. Canseco-Esfagnos. Talavera de la Reina. 269 pp.

Uzzell, T. and Tunner, H. G. (1983). An inmunological analysis of Spanish and French water frogs. Journal of Herpetology, 17: 320-326.

Wicherley, J., Doran, S. and Beebee, T. J. C. (2003). Tracing aliens: identification of introduced water frogs in Britain by male advertisement call characteristics. Herpetological Journal, 13 (1): 43-50.

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