Spreidaridae

Spreidaridae is a family of extinct ammonites, a diverse group of marine mollusks belonging to the subclass Ammonoidea. These cephalopods lived during the Mesozoic Era. The Spreidaridae family is characterized by specific shell morphology, which paleontologists use to classify and understand their evolutionary relationships.

Fossils of Spreidaridae are found in various geological formations, providing insights into ancient marine environments and the distribution of life in prehistoric oceans. The study of these fossils helps in dating rock layers and reconstructing the paleoecology of the time periods in which they lived. Like other ammonites, Spreidaridae possessed a coiled, chambered shell. The exact stratigraphic range and precise taxonomic classification within Ammonoidea are subjects of ongoing paleontological research. Information regarding their specific diet, reproductive strategies, and population dynamics is inferred from fossil evidence and comparative anatomy with related species. Their extinction, along with that of all other ammonites, occurred at the end of the Cretaceous period.