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About: Elegestolepis     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dbo:Fish, within Data Space : dbpedia.org associated with source document(s)

Type: fish New Facet based on Instances of this Class

Elegestolepis is a primitive shark from the Mongolepidida that lived during the Silurian and Devonian periods in Russia with only one species, E. grossi, known to date. It was closely related to and . It is only known from fragmentary placoid scales discovered in Russia before 1973. The oldest of these scales have been dated back to the Ludlow epoch (427.4 Ma to 423 Ma), making Elegestolepis the oldest known shark.Elegestolepis dates back to about 420 years ago, but some scales that may yet represent another shark ancestor are known from 450 million years ago.