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16 relations: Ammonitida, Ancistroceras, Angelinoceras, Animal, Cephalopod, Ceratitida, Holmiceras, Litoceras, Mollusca, Nautiloid, Ordovician, Orthocerida, Rhynchorthoceras, Silurian, Tarphycerida, Treatise on Invertebrate Paleontology.
Ammonitida
Ammonitida is an order of more highly evolved ammonoid cephalopods that lived from the Jurassic through Cretaceous time periods, commonly with intricate ammonitic sutures.
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Ancistroceras
Ancistroceras is one of the two ancestral lituitids from the late Early Ordovician (Arenigian).
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Angelinoceras
Angelinoceras is a genus of lituitids from the Middle Ordovician that starts off with an open spiral of about 1.5 strongly compressed whorls followed by a straight orthoconic section that continues to expand for a length about equal to the diameter of the coiled portion before retaining a more or less consistent diameter.
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Animal
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.
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Cephalopod
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδα, kephalópoda; "head-feet") such as a squid, octopus or nautilus.
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Ceratitida
Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammonites.
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Holmiceras
Holmiceras is one of two ancestral lituitids from the late Early Ordovician (Arenigian).
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Litoceras
Litoceras is a trocholitid (Tarphycerida) genus that has been found in the Lower and Middle Ordovician of Newfoundland.
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Mollusca
Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusksThe formerly dominant spelling mollusk is still used in the U.S. — see the reasons given in Gary Rosenberg's.
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Nautiloid
Nautiloids are a large and diverse group of marine cephalopods (Mollusca) belonging to the subclass Nautiloidea that began in the Late Cambrian and are represented today by the living Nautilus and Allonautilus.
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Ordovician
The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era.
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Orthocerida
Orthocerida is an order of extinct Orthoceratoid cephalopods also known as the Michelinocerda that lived from the Early Ordovician possibly to the Late Triassic.
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Rhynchorthoceras
Rhynchorthoceras is a Middle Ordovician genus characterized by a rapidly expanded, weakly annulate orthocone, like the orthoconic section of Ancistroceras, but with only a curved, cyrtoconic apex instead of juvenile whorls.
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Silurian
The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago (Mya), to the beginning of the Devonian Period, Mya.
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Tarphycerida
The Tarphycerida were the first of the coiled cephalopods, found in marine sediments from the Lower Ordovician (middle and upper Canad) to the Middle Devonian.
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Treatise on Invertebrate Paleontology
The Treatise on Invertebrate Paleontology (or TIP) published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals.
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