Complex sentence: The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi in 2005 is the most up-to-date system of classifying gastropods, a class of animals which consists of snails and slugs of every kind.
Split into simpler sentences: The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi in 2005 is the most up-to-date system of classifying gastropod mollusks. Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind.