†superfamily Megatrigonioidea van Hoepen 1929 (clam)
Parent taxon: Trigoniida according to P. Bouchet et al. 2010
Sister taxa: Andivaugonia, Antutitrigonia, Arabitrigonia, Beichuanioidea, Columbitrigonia, Dampietrigonia, Gobiella, Heslingtonia, Kupenga, Litotrigonia, Lyrodesmatacea, Macrotrigonia, Mediterraneotrigonia, Myophorellina, Myophorelloidea, Nakanotrigonia, Neuquenenitrigonia, Paranditrigonia, Procostaria, Pseudocardinioidea, Skwarkoella, Trigoniina, Trigonioidea, Trigonioidoidea, Trigonodoidea, Virgotrigonia, Zaletrigonia, Zulutrigonia
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder
Distribution: there are no occurrences of Megatrigonioidea in the database