Helcionella

Helcionella; Temporal range: Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	†Helcionelloida
Order:	†Helcionelliformes
Family:	†Helcionellidae
Genus:	†Helcionella; Grabau & Shimer, 1909
Species
	H. bella Feng et al. ; H. emargina Cobbold, 1919 ; H. histosia Jacquet & Brock, 2016 ; H. oblonga Cobbold, 1921 ; (incomplete list)
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.

References

^ 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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[Cobbold1919-1] Cobbold, E. S. (1919). "I.—Cambrian Hyolithidæ, etc., from Hartshill in the Nuneaton District, Warwickshire". Geological Magazine. 6: 149–158. doi:10.1017/S0016756800202483.

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