30568 - Rare 0.22 Inch Tasagnostus debori Middle Cambrian Trilobite - Tasmania, Australia Pseudobasiliscus 78 apfu (atoms per formula

78 apfu (atoms per formula unit)

and then a small sample of that is usually present at the base of the tooth

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

Sources: Globidens sp : Fossilworks (Paleobiology Database)

Cephalopoda - Ammonoidea - Mimosphinctidae

30568 - Rare 0.22 Inch Tasagnostus debori Middle Cambrian Trilobite - Tasmania, Australia Pseudobasiliscus 78 apfu (atoms per formulaTasagnostus, 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,