Suborder Trigoniina Dall 1899 (clam)

Bivalvia - Trigoniida

Parent taxon: Trigonioida according to E. Pérez et al. 2008

Sister taxa: Andivaugonia, Antutitrigonia, Arabitrigonia, Beichuanioidea, Columbitrigonia, Dampietrigonia, Gobiella, Heslingtonia, Kupenga, Litotrigonia, Lyrodesmatacea, Macrotrigonia, Mediterraneotrigonia, Megatrigonioidea, Myophorellina, Myophorelloidea, Nakanotrigonia, Neuquenenitrigonia, Paranditrigonia, Procostaria, Pseudocardinioidea, Skwarkoella, Trigonioidea, Trigonioidoidea, Trigonodoidea, Zaletrigonia, Zulutrigonia

Subtaxa: Trigoniacea

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Ecology: facultatively mobile infaunal suspension feeder

Distribution:

• Triassic of United States (9: Idaho, Montana, Utah collections)

Total: 9 collections each including a single occurrence

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