Come to our PaleoTime-NL International Fossil Show in Harderwijk (NL), on March 9th 2019!
Contribute knowledge and information to Fossiel.net!
How can I help?
Most Popular Articles
Astylospongia stellatum F1216
A spiral wound shell (for example ammonites) is called Involute when the successive turns strongly overlap. The umbilical diameter of an involute ammonite, is relatively small compared to the overall diameter.
Do you have additional information for this article? Please contact the Fossiel.net Team.