Family
Spyroceratidae Shimizu et Obata, 1935
Aiheeseen liittyvät julkaisut
Stumbur, H. A. 1956. On the nautiloids of Kohila Subseries (Upper Ordovician of East Baltic). Tartu Riikliku Ülikooli Toimetised 42, 176-185.
List of species
1. Spyroceras perlaeve (Strand, 1934) | Upper Ordovician
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Luokittelu
Organism group | Biota |
Kingdom | Animalia |
Phylum | Mollusca |
Class | Cephalopoda |
Subclass | Orthoceratia |
Order | Pseudorthocerida |
Family | Spyroceratidae |
Genus | Spyroceras |
Lyecoceras |