[Eruption and shedding of the teeth in the beaver, Castor fiber albicus (author's transl)].

46 skulls of Castor fiber albicus aged from 0 to 2 years were studied morphologically and radiographically with regard to eruption and shedding of the teeth. According to the characteristics of the dentition the age of immature beavers until to 1 1/2 years can be determined with an error of about 4 weeks. Later the development of the roots and the apposition of cementum are to consider additionally.