Giant Polished Orthoceras Fossils - Larger Size 6-9 Inches - Beautiful Straight Horn Fossils - Genuine Orthoceras Fossils

This listing is for one photographed Polished Orthoceras Fossil. These are a much larger size than typically found. Incredible fossils of the ancestor to modern day squids from millions of years ago!!! Wicked cool.

These fossils, commonly known by the genus name Orthoceras, are extinct "straight-shelled" cephalopods that lived during the Upper Devonian period (around 370 million years ago). They lived inside of their shells, used tentacles to grab food, and used jet propulsion, squirting water to move.

Orthoceras is a genus of extinct nautiloid cephalopod restricted to Middle Ordovician-aged marine limestones of the Baltic States and Sweden. This genus is sometimes called Orthoceratites. Sometimes misspelled as Orthocera, Orthocerus or Orthoceros.

Orthoceras was formerly thought to have had a worldwide distribution due to the genus' use as a wastebasket taxon for numerous species of conical-shelled nautiloids throughout the Paleozoic and Triassic. Since this work was carried out and re cataloging of the genus, Orthoceras sensu stricto refers to Orthoceras regulare, of Ordovician-aged Baltic Sea limestones of Sweden and neighboring areas.

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Giant Polished Orthoceras Fossils - Larger Size 6-9 Inches - Beautiful Straight Horn Fossils - Genuine Orthoceras Fossils