Bivalvia - Cardiida - Mactridae
Alternative spelling: Ruellia
Parent taxon: Spisula according to J. Le Renard and J.-M. Pacaud 1995
See also Sepkoski 2002
Sister taxa: Mactra (Spisula) sammamishensis, Spisula (Austromactra), Spisula (Cymbophora), Spisula (Eomactra), Spisula (Notospisula), Spisula (Spisula), Spisula (Spisulona), 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
Subtaxa: Spisula (Ruellia) bernayi
Ecology: facultatively mobile infaunal suspension feeder
Distribution: found only at Le Quoniam near Haravilliers (Pacaud collection) (Eocene of France)