Rhynchonellata - Pentamerida - Tetralobulidae
Parent taxon: Porambonitoidea according to J. Hansen and L. E. Holmer 2011
See also Benedetto 2003, Popov et al. 2005, Williams et al. 2002 and Zhan et al. 2010
Sister taxa: Clarkellidae, Eostrophiidae, Huenellidae, Syntrophiidae
Subtaxa: Punctolirinae Syntrophopsinae Tetralobula Tetralobulinae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Whiterockian of United States (19: California, Nevada, Utah collections)
• Fennian of Canada (1: New Brunswick)
• Volkhov of the Russian Federation (1)
• Arenig of Argentina (2), Canada (1: New Brunswick), China (19), the United Kingdom (1)
• Arenigian of Argentina (2), United States (1: Nevada)
• Dawan of China (2)
• Ordovician of Australia (2), Canada (5: Alberta, British Columbia, Newfoundland), China (14), Ireland (1), Norway (3), the Russian Federation (14), United States (29: Arkansas, California, Idaho, Missouri, Montana, Nevada, Texas, Utah, Virginia)
• Canadian of Canada (4: Northwest Territories), United States (2: Maryland)
• Tremadoc of China (12), the Russian Federation (6), United States (1: Montana)
• Ibexian of United States (2: Nevada)
• Cambrian to Ordovician of the Russian Federation (1)
• Cambrian of Canada (1: Quebec), China (28), Iran (1), Kazakhstan (6), the Russian Federation (2), United States (1: Texas)
Total: 184 collections including 207 occurrences