Loxolenichnus

Breton, Gérard, Wisshak, Max, Néraudeau, Didier & Morel, Nicolas, 2017, Parasitic gastropod bioerosion trace fossil on Cenomanian oysters from Le Mans, France and its ichnologic and taphonomic context, Acta Palaeontologica Polonica 62 (1), pp. 45-57 : 51

Key to the three ichnospecies of Loxolenichnus :

1a Peripheral groove more or less stellate .............................................. ........................................................... Loxolenichnus stellatocinctus

1b Peripheral groove not stellate, rounded or oval .............................. 2

2a Peripheral groove rounded, the drill hole in the middle of the area surrounded by a quite distinct peripheral groove ............................... ........................................................................... Loxolenichnus halo

2b Peripheral groove oval, the drill hole tangential or close to the less distinct peripheral groove ............................... Loxolenichnus taddei