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.

• A. W. Grabau and H. W. Shimer. 1909. North American index fossils, invertebrates 1-909