Rank Order | Scientific name Acrotretida | |
 | ||
Similar Lingulida, Linguliformea, Lingulata, Pentamerida, Inarticulata | ||
The Acrotretida are a group of sessile, suspension-feeding brachiopods known from the Cambrian period and surviving until the present day. Their shell has a round outline, and is usually phosphatic in recent specimens.
References
Acrotretida Wikipedia(Text) CC BY-SA