> toothed whales are a parvorder of cetaceans that includes dolphins, porpoises, and all other whales possessing teeth The article for whales [1] linked from t

> toothed whales are a parvorder of cetaceans that includes dolphins, porpoises, and all other whales possessing teeth The article for whales [1] linked from that sentence says "They are an informal grouping within the infraorder Cetacea, usually excluding dolphins and porpoises." [1] https://en.wikipedia.org/wiki/Whale https://en.wikipedia.org/wiki/Whale