30568 - Rare 0.22 Inch Tasagnostus debori Middle Cambrian Trilobite - Tasmania, Australia Pseudobasiliscus It is a tooth of

It is a tooth of the lower jaw of a cow shark

This piece has a very special position within our dinosaur bones collection

Nice rolled specimen

Walcott 1886

78 apfu (atoms per formula unit)

30568 - Rare 0.22 Inch Tasagnostus debori Middle Cambrian Trilobite - Tasmania, Australia Pseudobasiliscus It is a tooth ofTasagnostus, Jago 1976 (trilobite) Trilobita Agnostida PaleoDB taxon number: 19324 Parent taxon: Agnostida according to J. J. Sepkoski 2002 Sister taxa: Agnostidae, Agnostina, Agnostogonus, Agnostoidea, Aistagnostus, Allobodochus, Ammagnostidae, Armagnostus, Blystagnostus, Ceragnostus, Chatkalagnostus, Chelediscus, Clavagnostidae, Condylopygidae, Cristagnostus, Delagnostus, Dicerodiscus, Dignagnostus, Dolichoagnostus, Egyngolia, Euagnostus,