Thornton Dial, the self-taught Alabama artist whose best-known work — dense, chaotic wall reliefs that exist somewhere between painting and sculpture — recently entered the collection of the Metropolitan Museum of Art, is moving into the Manhattan gallery ecosphere. Mr. Dial, 87, will be represented by the Marianne Boesky Gallery, whose roster includes artists like Frank Stella, the painter Barnaby Furnas and the director John Waters.
