Rare Promicroceras marstonense (Spath 1925) from the Lower Lias (Sinemurian), Marston Magna limestone, Obtusum Zone, Somerset. These nodules contain a rich ammonite deathbed assemblage. They are highly sought after by collectors around the world. A very limited amount was excavated from the site, hence the rarity. They are very similar to the Promicroceras planicosta that are found in Lyme Regis, and make a great companion fossil.
We are offering these specimens for an affordable price. We hope to get a few specimens here and there on our travels in the future.
Size: 6.3cm wide nodule