†family Estonioceratidae Hyatt 1900 (mollusk)

Cephalopoda - Tarphycerida - Estonioceratidae

Synonym: Deltoceratidae Ulrich et al. 1942

Parent taxon: Tarphycerida according to D.H. Evans 2011

See also Crick 1981, Kröger and Landing 2008, Kröger and Mutvei 2005 and Stait 1983

Sister taxa: Bateroboceras, Bodieceras, Craftonoceras, Discoceratidae, Inclytoceras, Kosovoceras, Magdoceras, Ophidioceratidae, Pakrioceras, Pseudancistroceras, Tarphyceratidae, Trocholitidae, Weberoceratidae

Subtaxa: Aethoceras Alaskoceras Aphetoceras Clytoceras Deltoceras Eichwaldoceras Estonioceras Pycnoceras Shumardoceras Tragoceras

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Ecology: fast-moving nektobenthic carnivore

Distribution:

• Ordovician of Canada (3: Newfoundland, Newfoundland and Labrador, Quebec collections), China (1), Norway (1), Sweden (1), the United Kingdom (3), United States (27: Arkansas, Missouri, New York, Tennessee, Texas)

• Chazy of United States (2: New York)

• Arenig of China (1)

• Cassinian of United States (1: Missouri)

• Canadian of Australia (1)

• Jefferson of United States (2: Missouri, Oklahoma)

• Jeffersonian of Canada (1: Newfoundland and Labrador), United States (2: Missouri)

Total: 46 collections including 59 occurrences

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