Porosoma sp. Echinoderma from Eocene in Monistrol de Calders (Moianès); in 1st and 3rd images in top view and in 2nd and 4th images in oral view.
[photos Marta Queralt López Salvans / Museum of Geology Valentí Masachs (1st and 2nd) and Jordi Badia (3rd and 4th)]