Article: The affinities of early oncocerid nautiloids from the Lower Ordovician of Spitsbergen and Sweden
Publication: Palaeontology
Volume:
33
Part:
3
Publication Date:
August
1990
Page(s):
623
–
630
Author(s):
David H. Evans and Andrew H. King
Abstract
Phthanoncoceras oelandense gen. et sp. nov. from the Kundan (Llanvirn) of Sweden and Valhalloceras floweri gen. et sp. nov. from the Cassinian (Arenig) of Ny Friesland, Spitsbergen are described and a new family, the Phthanoncoceratidae (Oncocerida) is proposed. The relationships of the Phthanoncoceratidae to the Oncocerida and Ellesmerocerida are discussed.