ハナゴンドウ
Fossils of an extinct relative, "Globicephala baereckeii", have been found in Pleistocene deposits in Florida. Another "Globicephala" dolphin was discovered in Pliocene strata in Tuscany, Italy, and was named "G. etruriae". The pilot whales were also close relatives of the extinct blunt-snouted dolphin. Close living relatives of the pilot whales are the melon-headed whale, the pygmy killer whale, the false killer whale, and Risso's dolphin.