This rock contains three species of ammonite commonly found together. Three of the specimens in the block have chunks missing from the outer whorl. These holes in the shell are always found in the same part of the ammonite, and are interpreted as bite marks.
The bite marks are a paratype of Bicrescomanducator rolli. A paratype is an additional specimen that helps to define the variation in the fossil species.
Find out more about ammonites on the molluscs pages.