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| Cidaris belgica, Cidaridae, Cidaroida (17 mm), colno 51787 Miste, Gelderland, Netherlands Layer of Miste, Formation of Aalten, Miocene, Tertiary |
Cidaris belgica, Cidaridae, Cidaroida (41 mm), colno 60367 Heist op den Berg, Antwerp, Belgium Sands of Zonderschot, Burdigalian, Miocene, Tertiary |
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| Cidaris belgica, Cidaridae, Cidaroida (47 mm), colno 60431 Ekeren (dump), East Flanders, Belgium Sands of Antwerp (mixed), Serravalian, Miocene, Tertiary |
Cidaris taouzensis, Cidaridae, Cidaroida (28 mm), colno 39677 Gourama, Morocco Cenomanian, Cretaceous |
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