Gastropoda - Lepetellida - Fissurellidae
Alternative spelling: Arginula
Parent taxon: Emarginula according to J. B. Knight et al. 1960
See also Sepkoski 2002
Sister taxa: Emarginula (Altomarginula), Emarginula (Emarginula), Emarginula (Semperia), Emarginula (Subzeidora), Emarginula (Tauschia), Emarginula abnormis, Emarginula bella, Emarginula clathrata, Emarginula clathrataeformis, Emarginula clypeata, Emarginula conformis, Emarginula conica, Emarginula costata, Emarginula crassa, Emarginula dotyhillsensis, Emarginula elegans, Emarginula elongata, Emarginula fissura, Emarginula gabbi, Emarginula incisura, Emarginula kitteli, Emarginula mareana, Emarginula marylandica, Emarginula muensteri, Emarginula multiradiata, Emarginula punctura, Emarginula radiola, Emarginula reticulata, Emarginula rosea, Emarginula squammata, Emarginula striatissima, Emarginula tropica, Emarginula variegata, Emarginula washingtoniana
Subtaxa: none
Ecology: facultatively mobile epifaunal grazer-carnivore
Distribution: found only at PRI 1423 (Eocene of Alabama)