Inarticulata was historically defined as one of the two classes of the phylum Brachiopoda and referred to those having no hinge. The other class was Articulata, meaning articulated — having a hinge between the dorsal and ventral valves.[1] These classifications have now been superseded, see brachiopod classification.

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  1. ^ Shipley, Arthur Everett (1911). "Brachiopoda" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. 4 (11th ed.). Cambridge University Press. p. 360.