Entobia cretacea (Portlock 1843) Trace fossil of sponge borings in oyster
Sponge trace fossil
(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.
66 million years
Prairie Bluff Fm. (Chalk)
“Entobia cretacea (Portlock 1843) Trace fossil of sponge borings in oyster,” Mississippi State University Libraries, accessed February 6, 2023, https://msstate-exhibits.libraryhost.com/items/show/1527.
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