''Alisina'' is a
Cambrian
The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordov ...
genus of
Obolellid brachiopod from which soft tissue (including pedicle) is known.
References
Brachiopod genera
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