The Collaborative International Dictionary of English v.0.48:

Macruridae \Macruridae\, prop. n., (Zool.)
   Same as Macrouridae.

   Syn: Macrouridae.
        [WordNet 1.6]

WordNet (r) 3.0 (2006):

Macruridae
    n 1: grenadiers [syn: Macrouridae, family Macrouridae,
         Macruridae, family Macruridae]