Complex sentence: Siphonarioidea is a taxonomic group of air-breathing sea snails or false limpets, a superfamily in the informal group Basommatophora within the Pulmonata.
Split into simpler sentences: Siphonarioidea is a taxonomic group of air-breathing sea snails or false limpets. Siphonarioidea has been a superfamily in the informal group Basommatophora within the Pulmonata.