Definition of Helcionellacea. Meaning of Helcionellacea. Synonyms of Helcionellacea

Here you will find one or more explanations in English for the word Helcionellacea. Also in the bottom left of the page several parts of wikipedia pages related to the word Helcionellacea and, of course, Helcionellacea synonyms and on the right images related to the word Helcionellacea.

Definition of Helcionellacea

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Meaning of Helcionellacea from wikipedia

- The Helcionellacea is one of two taxonomic superfamilies of extinct primitive marine molluscs within the order Bellerophontida. This superfamily is thought...
- then regarded, includes two superfamilies, the Helcionellacea, and the Bellerphonitacea. The Helcionellacea are the more primitive, with more cap-like s****...
- have happened late in the Cambrian. Earlier gastropods belonged to the Helcionellacea, Bellerophontacea, and questionably to the Palegiellacea. The Treatise...