There are two types of black brane solutions in 11-dimensional supergravity, one of dimension , one of dimension 5+1. These are thought to correspond to a fundamental 2-brane and its EM dual, called the
The M2-brane carries electric charge under the supergravity C-field. The M5-brane is the dual magnetic charge.
Under reduction to type II supergravity the M2 and the M5 turn into the D-branes and the NS-branes.
Table of branes appearing in supergravity/string theory (for classification see at brane scan).