Orthalicoidea is a superfamily of Gastropoda. There are 659 species of Orthalicoidea, in 65 genera and 8 families. This superfamily has been around since the eocene epoch. It includes groups like Bothriembryontidae, Simpulopsidae, and Amphibulimidae. Dead Orthalicoidea form shallow marine sediments. They have sexual reproduction.
EOL has data for 11 attributes, including: