Promicroceras marstonense, Xipheroceras xiphus
Lower Jurassic, Lower Lias, Obtusum zone
Marston magna, Somerset, UK
This is a really nice specimen that has been fully prepared on one side . There are numerous complete and partial specimens running through this specimen. The back of this specimen has been cut.
The matrix measures approximately 8.5 cm's x 6.9cm's