Parent taxon: Trigoniida according to J. G. Carter et al. 2011
See also Nevesskaja 2009
Sister taxa: Andivaugonia, Antutitrigonia, Arabitrigonia, Beichuanioidea, Columbitrigonia, Dampietrigonia, Gobiella, Heslingtonia, Kupenga, Litotrigonia, Lyrodesmatacea, Macrotrigonia, Mediterraneotrigonia, Megatrigonioidea, Myophorellina, Myophorelloidea, Nakanotrigonia, Neuquenenitrigonia, Paranditrigonia, Procostaria, Pseudocardinioidea, Skwarkoella, Trigoniina, Trigonioidea, Trigonioidoidea, Virgotrigonia, Zaletrigonia, Zulutrigonia
Subtaxa: Desertellidae Trigonodidae
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Triassic of Bosnia and Herzegovina (2 collections), China (3), Germany (3), Hungary (2), Indonesia (1), Israel (1), Italy (20), Japan (1), Laos (1), Peru (1), the Russian Federation (23), Slovakia (1), Slovenia (21), Thailand (2), United States (13: Alaska, Utah, Wyoming), Vietnam (15)
• Arenig of Australia (2)
Total: 112 collections including 199 occurrences