Helcionella

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
Temporal range: Cambrian
Scientific classification
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 the type genus of the family Helcionellidae.

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


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