Parent taxon: Lagenina according to A. R. Loeblich and H. Tappan 1988
See also Kiessling 2003
Sister taxa: Frondinidae, Ichthyolariidae, Ichtyolariidae, Langella, Protonodosariidae, Pseudolangella
Subtaxa: Partisaniidae Robuloididae Syzraniidae
Ecology: stationary infaunal deposit feeder
Distribution:
• Jurassic of Germany (22 collections), Spain (19), Switzerland (3)
• Triassic of China (7)
• Permian of Armenia (7), Australia (17), Azerbaijan (12), Canada (1: Nunavut), China (39), Greece (2), Iran (23), Israel (11), Italy (19), Japan (8), the Russian Federation (3), Turkey (9)
• Carboniferous of Canada (2: Nunavut), Norway (8), Turkey (1), United States (36: Iowa, Kansas, Missouri, Nebraska, New Mexico, Oklahoma)
Total: 249 collections including 325 occurrences