88 - Trigonia

Hello friends, Welcome to the  Fossil   Repository at the Department of Geology, Shivaji Science College, Nagpur.

I am Trigonia, belonging  to the Phylum Mollusca, which encompasses a diverse group of invertebrate animals including snails, clams, and octopuses. Within the Kingdom Animalia, I am one of the many fascinating organisms that inhabit this planet. I  typically have a distinctive triangular or wedge-shaped shell, which is where my name is derived from Trigonia meaning three angles. My  shells often feature prominent ribs or ridges, which provide structural support and add  to my unique appearance. I possess a hinge-like structure that allows my  shells to open and close, much like modern-day clams. My overall appearance reflects my  adaptation to life in marine environments. My shells are often found well-preserved in sedimentary rocks. I have been discovered in numerous locations around the world, primarily in marine sedimentary deposits. I was particularly abundant during the Mesozoic Era, which spanned from approximately 252 to 66 million years ago. My fossils have been found in regions that were once submerged beneath ancient seas, such as parts of Europe, Asia, Australia, and North America. I emerged during the Triassic period, around 250 million years ago. I reached my peak diversity during the Jurassic and Cretaceous periods, before experiencing a decline towards the end of the Mesozoic Era.

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