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Temporal range: Mid Cambrian–Present
Scientific classification e
Kingdom: Animalia
Phylum: Brachiopoda
Class: Lingulata
Order: Acrotretida

The Acrotretida are a group of sessile, suspension-feeding brachiopods known from the Cambrian period and surviving until the present day.[1] Their shell has a round outline, and is usually phosphatic in recent specimens.


  1. ^ Holmer, L. (1991). "Phyletic relationships within the Brachiopoda". GFF. 113: 84. doi:10.1080/11035899109453832. 

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