Helicoidea is a superfamily of snails. There are 2802 species of Helicoidea, in 491 genera and 17 families. This superfamily has been around since the thanetian age. It includes groups like Xanthonychidae, Labyrinthidae, and Thysanophoridae. Dead Helicoidea form shallow marine sediments. They have sexual reproduction.
EOL has data for 22 attributes, including: