[N] 2012 Ostafrikasaurus crassiserratus the earliest currently known spinosaurid
Buffetaut, Eric (2012). ’An early spinosaurid dinosaur from the Late Jurassic of Tendaguru (Tanzania) and the evolution of the spinosaurid dentition’. Oryctos 10: 1-8.
An isolated theropod tooth from the terminal Jurassic of the Tendaguru (Tanzania), originally referred to Labrosaurus (?) stechowi, is described as the type specimen of a new genus and species of spinosaurid theropod. [Ostafrikasaurus crassiserratus]
It shows an enamel ornamentation reminiscent of Baryonyx and allied forms, but differs from all other known spinosaurids by the large size of the denticles borne by the carinae. The new taxon is the earliest currently known spinosaurid. It sheds some light on aspects of dental evolution in spinosaurids, which seems to have been characterised by reduction of the denticles.