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The cow sharks are considered the most primitive ones because they preserve a skeleton anatomy very similar to the ancient and first types of sharks
Because of this
with Ca= 0
It has a tiny glued fracture
5 and 5% of the sample
08321 - Nicely Preserved Spiny 1.65 Inch Leonaspis sp Middle Devonian Koneprusia The cow sharks are consideredSpectacularly well detailed specimen. It has been carefully prepared during a long laboratory process. Leonaspis is a widespread genus of odontopleurid trilobite that lived from the Late Ordovician to the late Middle Devonian. Fossils of various species have been found on all continents except Antarctica. Leonaspis, Richter and Richter 1917 (trilobite) Trilobita Lichida Odontopleuridae Synonym: Acanthalomina (taxon 122150) Parent taxon:
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