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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# 5592/3253A/FK315) Extinct genus - These marine snails were carnivourous and actively mobile.

(DSM# FK317) Extant genus - This epifaunal marine gastropod was highly mobile in its search for food. Epifaunal means that it lived either on the hard sea floor or on other hard-shelled organisms.

(DSM# FK326) Genus of bivalve that lived on the coastal inner shelf and grew by the process of accretion.

(DSM# FK161) Extinct genus of suspension feeder.