Sponges and corals from the Middle Eocene (Bartonian) marly formations of the Pamplona Basin (Navarre, western Pyrenees): Taphonomy, taxonomy, and paleoenvironments

1. Astibia, H.
2. Elorza, J.
3. Pisera, A.
4. Álvarez-Pérez, G.
5. Payros, A.
6. Ortiz, S.