Abstract
Several multivariate models of the evolution of Triturus (Caudata, Salamandridae) are inferred using both living species and the oldest measurable fossils of the genus (Lowermost Oligocene, Hoogbutsel, Belgium). Dendrograms are obtained by changes on the following parameters: a) number of fossil forms; b) morphological distance estimation; and e) anatomical skeletal unit. The number of fossil species present at Hoogbutsel is discussed by comparison with the variability of living forms. The models are compared among themselves and with non-morphological ones. The lack of a perfect congruence seems to be a general phenomenon, although less evident concerning changes in the first case (a) and more conspicous in the second (b) and third (e) cases. These results are combined in order to estimate a general evolutionary model that takes into account the fossil forms.
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