Purpuroidea is an extinct genus of sea snails, marine gastropod molluscs in the clade Littorinimorpha.
These extinct sea snails lived between the Middle Triassic, Ladinian age (about 242 - 237 million years ago) and the Early Cretaceous, Turonian age (about 122 â 112 million years ago). The fossils were found in Japan, Portugal, Ethiopia, France, Israel, Italy, Jordan, Kenya, Mexico, Romania, Saudi Arabia, Tanzania, Tunisia, Austria, Hungary, Iran and United States.
Species within this genus include: