Helcionella Temporal range:
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Scientific classification
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Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | † Helcionelloida |
Order: | † Helcionelliformes |
Family: | † Helcionellidae |
Genus: | †
Helcionella Grabau & Shimer, 1909 |
Species | |
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Synonyms | |
Pseudotheca Redlich 1899 |
Helcionella is a genus of helcionellid, a fossil marine invertebrate animal that is considered to be a mollusk and may possibly be a gastropod. The shells of these animals are about a centimetre in size. The tip of the shell extends beyond the rear extremity of the shell's aperture, and the shell is "endogastric" in shape. [1]
Helcionella is the type genus of the family Helcionellidae.