This male Calotriton asper was shot in Spain in 2001.

A recent article shows that the genus Euproctus was polyphyletic. The conclusions of the phylogenetical analysis held in the course of this study reveal that the Pyrenean brook salamanders were phylogeneticaly separated from the Mediterranean ones. Therefore, a new genus name has been resurected. The old Euproctus asper should now be called Calotriton asper (Dugès, 1852).

Another species has been described in this article. It is Calotriton arnoldi Carranza & Amat, 2005. It is currently only known from the massif of El Montseny, in Catalogna.

 The reference of the article is as follow:

Carranza S. & Amat F. 2005 - Taxonomy, biogeography and evolution of Euproctus (Amphibia: Salamandridae), with resurrection of the genus Calotriton and the description of a new endemic species from the Iberian Peninsula. Zool. Journ. Linn. Society, 145: 555-582