Article: Predation on Kosmoceras by semionotid fish in the Middle Jurassic Lower Oxford Clay of England

Broken ammonite debris is common in the Lower Oxford Clay and is thought to be attributable in part to the activities of predators. A new specimen of Kosmoceras (Zugokosmoceras) cf. obductum (Buckman) displays a series of bite marks in the region of the peristome suggestive of the dentition of the fishes Lepidotes, Heterostrophus (Semionotidae) and Mesturus (Pycnodontidae).