Aculifera
| Aculifera Temporal range: | |
|---|---|
| A polyplacophoran (chiton) | |
| The aplacophoran Epimenia | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Clade: | Aculifera Hatschek, 1891 |
| Classes | |
| |
Aculifera (older name: Amphineura) is a proposed clade of molluscs incorporating those groups that have no conch or shell, that is, the Polyplacophora, Caudofoveata (=Chaetodermomorpha) and Solenogastres (=Neomeniomorpha). It is sister to the Conchifera.
The oldest known aculiferan is Qaleruaqia, which was found in the Aftenstjernesø Formation in Greenland, which dates back to the Cambrian Stage 4.
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