Synonym: Loxognathus Graves and Ellison 1941
Parent taxon: Ozarkodinida according to P. C. J. Donoghue et al. 2008
See also Pyle and Barnes 2002, Sepkoski 2002 and Stouge and Rasmussen 1996
Sister taxa: Anchignathodontidae, Elictognathidae, Ellisoniidae, Gamachignathus, Gondolellidae, Gondolellidea, Gondolelloidea, Idiognathodontidae, Kockelellidae, Microzarkodina, Ozarkodinina, Palmatolepididae, Plectodina, Pterospathodontidae, Spathognathodontidae, Spathognathodontodae, Vjalovognathidae
Subtaxa: Periodon aculeatus Periodon grandis Periodon hankensis Periodon macrodentatus
Type: Periodon aculeatus
Ecology: nektonic carnivore
Distribution:
• Whiterockian of Norway (2 collections), United States (8: Nevada)
• Volkhov of Estonia (1), the Russian Federation (5), Sweden (1)
• Dawan of China (3)
• Arenig of Argentina (2), China (4), Norway (2)
• Ordovician of Argentina (29), Australia (4), Canada (62: British Columbia, Newfoundland, Northwest Territories, Québec), China (43), Denmark (1), Estonia (5), Iran (1), Kazakhstan (1), Malaysia (3), New Zealand (5), Norway (2), the Russian Federation (22), Svalbard and Jan Mayen (2), Sweden (4), the United Kingdom (2), United States (42: Minnesota, Nevada, New York, Oklahoma)
• Ibexian of United States (1: New York)
Total: 257 collections including 265 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.