| Helcionella | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| (unranked): | incertae sedis |
| Class: | †Helcionelloida |
| Order: | †Helcionelliformes |
| Family: | †Helcionellidae |
| Genus: | †Helcionella Grabau & Shimer, 1909 |
| Species | |
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Helcionella is the archetypical genus of helcionellid. Its shells are around about a centimetre in size; they are strongly endogastric, with the tip of the shell extending beyond the rear extremity of the shell's aperture.[1]