John Cancalosi / Fossil ammonite viewed under UV light, Desmoceras spp., upper early cretaceous, Albian stage, Mahajanga province, Madagascar

John Cancalosi / Fossil ammonite, Cleoniceras spp., from upper early cretaceous period, Albian stage, Mahajanga province, Madagascar

Juergen Freund / Handful of shells from Shell Beach, Shark Bay, Western Australia