Spitidiscus

Spitidiscus is a group of ancient sea creatures called ammonites. Ammonites lived in the oceans many millions of years ago. They had spiral shells that look like coiled shells or flowers. Spitidiscus belongs to a special family of ammonites known as Holcodiscidae.

These creatures were part of many different kinds of life in the ancient seas. They swam and moved around, helping the ocean ecosystems of their time. Studying Spitidiscus helps scientists learn more about how life changed long ago and how these amazing creatures lived.

Species

Here are some species that belong to the group Spitidiscus:

• Spitidiscus hugii
• Spitidiscus kilapiae - Found in Argentina
• Spitidiscus oregonensis - Found in Oregon
• Spitidiscus riccardii - Found in Argentina
• Spitidiscus rotulia - Found in England
• Spitidiscus simitiensis - Found in Colombia
• Spitidiscus vandeckii

Description

Spitidiscus is a group of ancient sea creatures called ammonites. They had spiral shells that were mostly round. Their shells had many small lines that sometimes split, along with shallow indentations. The main species, S. rotulia, was found in rocks from England from a time called the Hauterivian.

Biostratigraphic significance

The first appearance of the species Spitidiscus hugii or Spitidiscus vandeckii helps mark the beginning of the Barremian.

Distribution

Spitidiscus has been found in many places around the world. These include the Agrio Formation in Argentina, the Magdalena Valley, Simití, and Cáqueza in Colombia, the Kaliste Formation in the Czech Republic, France, Gagra in Georgia, the Maiolica Formation in Italy, the Subbetics in Spain, Foggy Creek in Oregon, as well as Bulgaria, Portugal, Russia, Morocco, and Mexico.