Mesozyphia

Mesozyphia is a genus of extinct ammonites, a group of marine mollusks that are now extinct. These cephalopods lived during the Mesozoic Era, specifically from the Early Jurassic to the Late Cretaceous periods. Mesozyphia ammonites are characterized by their distinctive shell morphology, often featuring elaborate ornamentation and specific coiling patterns. Their shells typically exhibit a smooth, evolute, and involute structure depending on the species within the genus.

Fossils of Mesozyphia are found in various marine sedimentary rocks worldwide, providing valuable insights into the paleogeography and paleoenvironment of ancient oceans. The study of Mesozyphia contributes to our understanding of ammonite evolution, their ecological roles, and the dating of geological strata. Their distribution and diversity varied across different geological epochs, reflecting changes in marine ecosystems over millions of years. Researchers analyze features such as suture lines, ribbing, and overall shell shape to classify different species and understand their relationships within the larger ammonoid group. The extinction of Mesozyphia, along with all other ammonites, occurred at the end of the Cretaceous period, a significant event in Earth's history.