The Affinities of Early Oncocerid Nautiloids from the Lower Ordovician of Spitsbergen and Sweden

D. H. Evans, and A. H. King

1990

Article

Palaeontology 33(3):623-630

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Taxa discussed in this work:

• Phtanoncoceras oelandense
• Phthanoncoceras
• Phthanoncoceratidae
• Valhalloceras
• Valhalloceras floweri

Taxonomy:

• Valhalloceras belongs to Phthanoncoceratidae - Evans and King (1990)
• Valhalloceras floweri belongs to Valhalloceras - Evans and King (1990)
• Phtanoncoceras oelandense belongs to Phthanoncoceras - Evans and King (1990)