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, Rioceratida, Slemmestadoceras, Orthoceras lateseptatum, Orthoceras celticum, Orthoceras sandlingense, Orthoceras variestriatum, Orthoceras pulchristriatum, Orthoceras indoaustralicum, Orthoceras nodosum, Orthoceras subellipticum, Orthoceras austriacum, Orthoceras mojsisovicsi, Orthoceras rotundulum, Orthoceras multilabiatum, Orthoceras lennaense, Orthoceras subtiliseptatum, Orthoceras shastense, Orthoceras baconicum, Orthoceras increscens, Orthoceras spitiense, Orthoceras triadicum, Orthoceras pulchellum, Orthoceras billiemense, Orthoceras styriacum, Orthoceras blakei, Orthoceras acum
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 (285: 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)
• Chazyan of Canada (1: Quebec)
• Whiterockian of United States (2: California)
• 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: 795 collections including 1017 occurrences