Original paper

On the rarity of anterior teeth of Asteracanthus magnus (Euselachii: Hybodontiformes)

Rigal, Stanislas; Cuny, Gilles


A partial dentition found in the Middle Jurassic (Bathonian) of Normandy (France) associates lateral teeth of Asteracanthus magnus with anterior teeth usually attributed to A. tenuis or A. longidens. According to this French specimen, teeth usually identified as anterior of A. magnus represent in fact teeth of the first lateral file. This discovery explains the apparent rarity of isolated anterior teeth of A. magnus in the fossil record, for which no associated dentition were hitherto known. It also demonstrates that the general arrangement of the dentition of A. magnus is closer to the one of A. smithwoodwardi than to the one of A. medius.