Hyolithid fossil. The hyolithids were a group of bottom-dwelling shelled invertebrates. It is thought that they fed on organic detritus in seabed mud.

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Hyolithid fossil. The hyolithids were a group of bottom-dwelling shelled invertebrates. It is thought that they fed on organic detritus in seabed mud. This fossil was found in Wales in beds from the Menevian age (514-509 million years ago) in the Cambrian period.

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Photo credit: © SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: age, animal, animals, bottom-dweller, cambrian, fauna, fossil, fossilised, historical, history, hyolithid, invertebrate, menevian, palaeontology, paleontology, period, prehistory, problematica, rock, single, wildlife