// Workers AI · dad joke modeWhat did Helcionella say? Shell-abrate.
| Helcionella Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | †Helcionelloida |
| Order: | †Helcionelliformes |
| Family: | †Helcionellidae |
| Genus: | †Helcionella Grabau & Shimer, 1909 |
| Species | |
| |
| Synonyms | |
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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.
References
[edit]- ↑ Cobbold, E. S. (1919). "I.—Cambrian Hyolithidæ, etc., from Hartshill in the Nuneaton District, Warwickshire". Geological Magazine. 6: 149–158. doi:10.1017/S0016756800202483.
- A. W. Grabau and H. W. Shimer. 1909. North American index fossils, invertebrates 1-909
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