Phylum Mollusca Rank Family | ||
Genus PseudorthocerataceaeSweet (1964) | ||
Pseudorthocerataceae is an extinct genus of actively mobile carnivorous cephalopod, essentially a Nautiloid, that lived in what would be North America, Europe, Australia, and Asia during the Ordovician from 490—445.6 mya, existing for approximately 44.4 million years.
Contents
Taxonomy
Pseudorthocerataceae was named by Sweet (1964). It was assigned to Pseudorthocerida by Barskov (1968); and to Orthocerida by Sweet (1964), Evans (1994) and Evans (1994).
Morphology
The shell is usually long, and may be straight ("orthoconic") or gently curved. In life, these animals may have been similar to the modern squid, except for the long shell.
Fossil distribution
Fossil distribution is exclusive to Sardinia, Wisconsin USA, and northern Ontario, Canada.
References
Pseudorthocerataceae Wikipedia(Text) CC BY-SA