Bivalvia - Venerida - Mactridae
Parent taxon: Spisula according to J. Marwick 1948
See also Marshall et al. 2025
Sister taxa: Mactra (Spisula) sammamishensis, Spisula (Austromactra), Spisula (Cymbophora), Spisula (Eomactra), Spisula (Hemimactra), Spisula (Notospisula), Spisula (Notospisula), Spisula (Ruellia), Spisula (Spisula), Spisula (Stereomactra), Spisula arcuata, Spisula brombachensis, Spisula callistaeformis, Spisula compressa, Spisula craspedota, Spisula decisa, Spisula dernburgi, Spisula elliptica, Spisula hannibali, Spisula hemphillii, Spisula jacksonensis, Spisula obtruncata, Spisula paralis, Spisula parilis, Spisula praetanius, Spisula praetenuis, Spisula rappahannockensis, Spisula semisulcata, Spisula sookensis, Spisula sorachiensis, Spisula subcuneata, Spisula subtruncata, Spisula twinensis, Spisula veneriformis, Notospisula trigonella
Subtaxa: none
Type: Mactra aequilatera
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of New Zealand (1 collection)
• Pliocene of United States (2: California)
• Miocene of Austria (1)
Total: 4 collections each including a single occurrence