Browse Items (2330 total)

(DSM# 3353) During the Cretaceous rudists were major reef-forming organisms.

(DSM 3253/FK148) Extinct genus of mussels that form shallow marine sediments.

(DSM# 1-538/FK165 An extinct species of oyster.

(uncatalogued) Extinct species - Scleractinian corals are still living today and are known as rock coral.

(DSM# 1085) Extinct genus - These calcareous tubes were once the home of sessile, soft-bodied marine worms. Sessile means that they are stationary and don't have means to move around on their own.

(DSM# 1691) Extinct species - This genus of tusk shell has more than fifty-one living species. Though we don't know which species this fossil represents it is likely it is extinct.

(DSM# 1875) Extant genus - This brachiopod is sometimes known as a "lamp shell" because of its resemblance to Roman oil lamps. Living relatives are found in marine environments worldwide.

(uncatalogued) The holes in this Gryphaeid oyster were left behind by a boring sponge. Boring organisms have the ability to dissolve calcareous shell which allows them to encrust other living and dead organisms.

(DSM# 10758) Extant genus - Clionid sponges are well known borers of other marine organisms such as clams and snails. They are able to dissolve shell material which helps secure them to a surface.

(DSM# FK342) Extinct genus - This is a marine crab that has only one species assigned to it. It is exclusively found in Cretaceous sediments of the southeastern United States.