Pteraspis rostrata Heterostracan Fish Fossil

A Devonian Jawless Fish

Pteraspis rostrata

(Agassiz, 1835)

Class Heterostraci, Order Pteraspidiformes, Family Pteraspididae

Geological Time: Lower Devonian

Size (25.4 mm = 1 inch): Fossil fish is 90 mm in length, 55 mm across on a 140 mm by 60 mm matrix

Fossil Site: Podolia, Ukraine

Fossil Code: RUF02

Price: Sold


Pteraspis rostrata Heterostracan Fish FossilDescription: The Heterostracans were a marvelously diverse group of agnathan fish. Typically there are two large bony plates protecting the body, one on the dorsal and one on the ventral side. They arose during the Pteraspis Jawless FishSilurian and achieved their greatest diversity during the Devonian. One of the most successful groups were the pteraspids, meaning wing shield, a term that refers to the spines that projected from the sides of the body of many of them. Seen here is the body shield, which is typically what is found. Few posterior elements are known; the artist’s life reconstruction is based upon other related types. The species went extinct at the end of the Lower Devonian, leaving no descendants.

Also see: Paleozoic Fish Fossils

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