Helcionelloida Temporal range:
| |
---|---|
Latouchella costata | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | †Helcionelloida Peel, 1991 |
Orders | |
and see text |
The Helcionelloida are an extinct class of fossil molluscs.
They are among the earliest animals with mineralised shells. They are also the oldest known molluscs wth a shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991.[1]
The latest word on this group is the classification of Parkhaev, who splits it into three subclasses.[2][3]