ABSTRACT
Skeletochronology is a method for the absolute determination of individual age in vertebrates. It is based on the use of the cyclical growth marks shown by cross sections in long bone cortices and teeth. This method is usable in extant as well as extinct taxa and allows absolute age estimates, in number of years. Cyclical growth marks are also excellent indicators of the growth pattern and local morphogenetic development of skeletal elements. The present review exposes the structural characteristics of these marks, their ecophysiological meaning, the kind of data they can yield and the methodological and technical requirements of their use. An overview of the practical results of skeletochronology is presented.
