Belemnitella americana showing internal molds.
Mt. Laurel Formation
It's not often one finds an internal mold of the guard where the internal texture is clearly visible. Although internal molds of other animals are common at this locality, any internal molds of belemnites are few and far between. Broken though it is, the lower specimen is one of my favorite belemnites.
© c. 2022 Heather JM Siple