Alternative spelling: Trinacriinae
Parent taxon: Noetiinae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Dockery 1982, Matsubara et al. 2010, Moore 1983 and Vokes 1980
Sister taxa: Arginella, Arginopsis, Didimacar, Halonanus, Hoernesarca, Matsumotoa, Noetiini, Noetiopsis, Protonoetia, Sheldonella, Striarcini
Subtaxa: Linter Pachecoa Trinacria
Distribution:
• Miocene of United States (11: Florida collections)
• Oligocene of United States (4: Mississippi)
• Eocene of Belgium (2), France (2), Hungary (1), Japan (2), the United Kingdom (3), United States (146: Alabama, Arkansas, California, Louisiana, Mississippi, Oregon, South Carolina, Texas, Virginia)
• Paleocene of Belgium (1)
• Cretaceous of Colombia (1), United States (36: Alabama, California, Georgia, Texas)
Total: 209 collections including 272 occurrences