Меловой период

Bengtson P., Ayoub-Hannaa W.S., Fürsich F.T., Heinze M. (2014) Taxonomy and palaeoecology of Pinna (P.) cretacea (Schlotheim, 1813) from the Upper Cretaceous of the Sergipe Basin, Brazil // Rev. bras. paleontol. Vol.17. no. 3. P.289-306.

http://www.sbpbrasil.org/assets/uploads ... 89a306.pdf