Complex sentence: Peltospiroidea is the name of superfamily of gastropods, that have been used in the taxonomy of the Gastropoda (Ponder & Lindberg, 1997) and it contained the only extant family Peltospiridae (and some prehistoric gastropod families).
Split into simpler sentences: Peltospiroidea is the name of a superfamily of gastropods that was used in the taxonomy of the Gastropoda (Ponder & Lindberg, 1997). It contained the only extant family Peltospiridae (and some prehistoric gastropod families).