Cephalopod Fossil at Basilica di Santa Croce

Here is a picture of a rare straight shelled cephalopod fossil found at Basilica di Santa Croce in Florence, Italy. I see a lot of coiled ammonoids in this material but not so many straight shelled cephalopods.

This building material is a iron enriched (red) limestone also known as Red Verona marble or Rosso Verona marble used in a lot of churches including this one. The material dates to the Upper Jurassic Period of the Rosso Ammonitico Formation, Oxfordian Stage, Verona Province, Venetia Region of Italy. Pictures taken August 2024.

 Look in the reddish square shapes in front of the tomb of Neri Corsini (1614-1678). Here is map.