Dinosaur Jr. is a rock band which formed in 1983 in Amherst, Massachusetts. The band was formed by J Mascis (guitar and vocals) and his high school classmate Lou Barlow (bass guitar), following the break-up of their hardcore punk band Deep Wound. Shortly afterwards, Murph (Emmett Patrick Murphy, drums) joined them. The band was originally called "Dinosaur", but changed its name following the release of its debut album Dinosaur in 1985, after a band called Dinosaurs, featuring ex-members of Country Joe and the Fish and Jefferson Airplane, threatened them with legal action.

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