The rebolo, also called the tantã, is a membranophone drum. It has a tapered, cylindrical shape, a wooden or aluminum structure, and synthetic or leather skin applied to one end.
Twelve-inch rebolos are called rebolo, tantã de corte or tantanzinho, whereas the 14-inch variety, with a lower-pitched sound, is usually called marcação. This version is played with the drum lying down, the drummer hitting the side with his or her hands during samba. This instrument was created as a part of the samba in Rio de Janeiro by Sereno, one of the founders of the Fundo de Quintal group, to replace the surdo de marcação in rodas de samba.