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(DSM# M76) Extinct species - This species of Gyrodes (moon snail) was a relatively common predatory snail found in the Cretaceous Western Interior Seaway.

(DSM#10765) These Hadrosaur specimens were found in marine sediments which suggests the animal died and floated into the ocean before sinking and being preserved.

(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# FK166) Extinct genus of carnivouous sea snail.