When Was the Nautiloid Alive?

Cephalopods originated in the Cambrian Period 570 to 500 million years ago and nautiloids originated in the Ordovician. Nautiloids were very successful, and grew rapidly in number of species in the Ordovician and Silurian Periods (the Silurian ended 410 million years ago).

Where is nautiloid found?

Shell of recent nautiloid cut in half to show inner chambers. Nautiloids first appeared about 500 million years ago. Then, there were many different species and they lived in the seas throughout the world. Today, the few surviving species are found in seas around Australia and the Philippines.

Are nautiloid from Paleozoic extinct?

Nautiloids flourished during the early Paleozoic era, where they constituted the main predatory animals, and developed an extraordinary diversity of shell shapes and forms. Some 2,500 species of fossil nautiloids are known, but only a handful of species survive to the present day.