Bivalvia - Nuculida - Nuculidae
Parent taxon: Acila according to E. J. Moore 1983
See also Durham 1944, Hendy 2020, Huber 2010, Kafanov and Ogasawara 2003, Kafanov et al. 2005, Moore 1984, Schenck 1936, Woodring 1938 and Woodring 1973
Sister taxa: Acila (Truncacila), Acila paita, Acila plura, Nucula (Acila) ermanni, Nucula (Acila) mirabilis, Nucula (Acila) nelsoni, Nucula (Acila) packardi, Nucula (Acila) pugetensis, Nucula (Acila) yakatagensis
Subtaxa: Acila (Acila) brevis Acila (Acila) divaricata Acila (Acila) gettysburgensis Acila (Acila) isthmica Acila (Acila) kholmskensis Acila (Acila) mirabilis Acila (Acila) praedivaricata Acila (Acila) semirostrata Acila (Acila) shimoyamai Acila (Acila) submirabilis Acila (Acila) vigilia
Ecology: facultatively mobile infaunal deposit feeder-suspension feeder
Distribution:
• Pliocene of Costa Rica (2 collections), Japan (3), United States (5: California)
• Miocene of Colombia (3), Japan (11), Panama (6), the Russian Federation (2), United States (6: Alaska, California, Oregon)
• Oligocene to Miocene of United States (1: Alaska)
• Oligocene of Japan (5), the Russian Federation (7), United States (21: Alaska, Washington)
• Eocene of Japan (2), the Russian Federation (2)
Total: 76 collections including 92 occurrences