(DSM# M38) Extant genus - Conus sp. (cone snail) are marine snails that hunt and feed upon vertebrates and invertebrates. Living cone snails are highly poisonous.
(DSM# 3258/FK190) Extinct genus - An epifaunal, carnivourous gastropod from the Late Cretaceous. Epifaunal means that they lived either on the hard sea floor or on other hard-shelled organisms.
(DSM# FK321) Extinct genus - This marine snail is relatively common in the Coon Creek tongue of the Ripley Formation but is less well-known from this locality.
Exogyra costata are commonly found in the Cretaceous strata in northeast Mississippi. This example from the Dunn-Seiler Museum shows damage to the growth lines that were repaired as the creature grew.
This chart shows the way geologic time is broken down into smaller spans of time called Eons, Eras, Periods, and Epochs. The top of the chart is current time, labeled as 0 Ma (0 years before present). The bottom of the chart represents the beginning…