The Collaborative International Dictionary of English v.0.48:

Micrurus \Micrurus\ prop. n.
   A genus of snakes including certain of the coral snakes, such
   as the eastern coral snake (Micrurus fulvius).

   Syn: genus Micrurus.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Micrurus
    n 1: coral snakes [syn: Micrurus, genus Micrurus]