Kingdom Animalia Superfamily Tryblidioidea Phylum Mollusca Order Tryblidiida | Class Monoplacophora Family Tryblidiidae Rank Genus | |
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Similar Helcionopsis striata, Tryblidiida, Monoplacophora | ||
Helcionopsis is an extinct genus of paleozoic monoplacophoran in the family Tryblidiidae.
Contents
The generic name is from the external resemblance which the genus bear to the recent species of the genus Helcion in family Patellidae.
Species
Species in the genus Helcionopsis include:
Shell description
General form and position of apex is as in Tryblidium, from which Helcionopsis differ in having the surface marked by fine radiating striae. Muscular scars of this genus Helcionopsis unknown in 1897, when the genus was described.
References
Helcionopsis Wikipedia(Text) CC BY-SA