Treptoceras crebriseptum (Hall 1847)
Size of picture: 7x6cm. Polished sample from Etobicoke Creek near Toronto, Ont. Canada. Georgian Bay Formation, Upper Ordovician.
By Ludwigia
Size of picture: 7x6cm. Polished sample from Etobicoke Creek near Toronto, Ont. Canada. Georgian Bay Formation, Upper Ordovician.
By Tidgy's Dad,
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