Tannuolina is a genus of tommotiid, belonging to the brachiopod stem lineage.

[1][2] It is conventionally interpreted as an essentially bivalved organism, similar to Micrina, though some use the unequal ratio of stellate to mitrate sclerites to argue for a halkieriid-like anatomy.

[3] More recently a tube-like construction inspired by Eccentrotheca has been proposed.

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