Full reference: I. S. Barskov. 1968. K evolutsii otryada Pseudorthoceratida (Golovonogye Mollyuski). Vsesoyusnoe Paleontologicheskogo Obchestvo, Trudy XII sessii Vsesoyusnovo Paleontologicheskogo Obchestvo 1968:90-97
Parent taxon: Orthoceratoidea according to A. Pohle and C. Klug 2024
See also Evans 2005, King and Evans 2019, Kröger 2008 and Pohle et al. 2022
Sister taxa: Actinocerida, Dissidocerida, Lituitida, Offleyoceratidae, Orthocerida, Paraphragmitidae, Protobactritidae, Riocerida, Slemmestadoceras, Orthoceras styriacum, Orthoceras subtiliseptatum, Orthoceras austriacum, Orthoceras spitiense, Orthoceras lateseptatum, Orthoceras mojsisovicsi, Orthoceras pulchristriatum, Orthoceras blakei, Orthoceras variestriatum, Orthoceras increscens, Orthoceras rotundulum, Orthoceras pulchellum, Orthoceras shastense, Orthoceras lennaense, Orthoceras nodosum, Orthoceras sandlingense, Orthoceras billiemense, Orthoceras subellipticum, Orthoceras indoaustralicum, Orthoceras baconicum, Orthoceras triadicum, Orthoceras multilabiatum, Orthoceras acum, Orthoceras celticum
Subtaxa: Pseudorthoceratidae Spyroceratidae Trematoceratidae
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of the Russian Federation (1 collection)
• Triassic of Afghanistan (2), Austria (16), Bosnia and Herzegovina (5), China (7), Hungary (4), India (3), Italy (13), Japan (4), Kazakhstan (8), Nepal (1), Romania (9), the Russian Federation (16), Switzerland (17), Türkiye (1), United States (18: Idaho, Nevada), Vietnam (1)
• Permian of Argentina (1), Armenia (1), Australia (2), Azerbaijan (14), China (47), Colombia (3), Greece (1), Iran (15), Italy (4), Japan (4), Malaysia (1), Mexico (6), Oman (1), Pakistan (1), the Russian Federation (8), Tajikistan (5), Timor-Leste (1), United States (35: Arizona, California, Idaho, Kansas, Nevada, New Mexico, Texas, Utah, Wyoming), Venezuela (2)
• Carboniferous to Permian of Japan (1)
• Carboniferous of Argentina (1), Australia (2), Canada (2: Nova Scotia), Czechia (2), Ireland (1), Kazakhstan (1), the Russian Federation (1), Ukraine (1), the United Kingdom (26), United States (284: Alabama, Arkansas, California, Colorado, Illinois, Indiana, Kansas, Kentucky, Maryland, Michigan, Missouri, Montana, Nevada, New Mexico, Ohio, Oklahoma, Texas)
• Devonian of Australia (1), Canada (1: Ontario), Czechia (10), Germany (4), Kyrgyzstan (1), Morocco (17), the Russian Federation (2), United States (62: Colorado, Indiana, New York, Pennsylvania)
• Silurian of Canada (3: Northwest Territories), China (2), Czechia (1), Germany (2), Italy (4), Morocco (1), Poland (3), the Russian Federation (5), United States (4: Alaska, New York)
• Whiterockian of United States (2: California)
• Chazyan of Canada (1: Quebec)
• Ordovician of Canada (29: Manitoba, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec, Saskatchewan), Estonia (5), Greenland (1), Norway (6), the United Kingdom (1), United States (26: Colorado, Illinois, Iowa, Wisconsin, Indiana, Ohio, Iowa, Michigan, Minnesota, Missouri, New York, Ohio, South Dakota, Tennessee, Virginia, Wyoming)
Total: 794 collections including 1016 occurrences