Aculifera
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Template:Short description Template:Automatic taxobox
Aculifera (older name: Amphineura) is a clade of molluscs incorporating those groups that have no conch or shell, that is, the Polyplacophora, Caudofoveata and Solenogastres.[1] It is a sister group to the Conchifera. Monophyly of Aculifera is supported by fossil, anatomical and molecular studies.[2]
The oldest known aculiferan is Qaleruaqia, which was found in the Aftenstjernesø Formation in Greenland, which dates back to the Cambrian Stage 4.[3]
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