Key innovations in ruminant evolution: A paleontological perspective
Key innovations are newly acquired structures that permit the performance of a new function and open new adaptive zones, and are, therefore, of paramount significance for understanding the history of the Ruminantia, particularly its diversification through the Miocene. Here we review and discuss what is known about these evolutionary novelties, with special emphasis on the […]
Ancestral feeding state of ruminants reconsidered: earliest grazing adaptation claims a mixed condition for Cervidae
Background: Specialised leaf-eating is almost universally regarded as the ancestral state of all ruminants, yet little evidence can be cited in support of this assumption, apart from the fact that all early ruminants had low crowned cheek teeth. Instead, recent years have seen the emergence evidence contradicting the conventional view that low tooth crowns always […]
Enamel ridge alignment in upper molars of ruminants in relation to their natural diet
Although it is generally thought that dental design reflects mechanical adaptations to particular diets, concrete concepts of such adaptations beyond the evolution of hypsodonty are largely missing. We investigated the alignment of enamel ridges in the occlusal molar surface of 37 ruminant species and tested for correlations with the percentage of grass in the natural […]
Dentition and age determination of the giraffe Giraffa Camelopardalis
Thirteen tooth eruption stages and their corresponding chronological ages are described from a series of giraffe jaws. These can be used for age determination in giraffes with immature dentition. Significant correlations of the lingual crown height ( r=0.957; P<0.001) and lingual occlusal surface width (r=0.959; P<0.001) with the number of dark staining incremental lines in […]