The Collaborative International Dictionary of English v.0.48:

Malopterurus \Malopterurus\ prop. n. [NL., from Gr. malako`s
   soft + ptero`n wing + o'yra` tail.] (Zool.)
   A variant spelling of Malapterurus.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Malapterurus \Mal*ap`te*ru"rus\
   (m[a^]l*[a^]p`t[-e]*r[udd]"r[u^]s), prop. n. [NL., from Gr.
   malako`s soft + ptero`n wing + o'yra` tail.] (Zool.)
   A genus of African siluroid fishes, including the electric
   catfishes. See Electric cat, under Electric. [Sometimes
   spelled Malopterurus.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

Malopterurus
    n 1: electric catfish [syn: Malopterurus, genus
         Malopterurus]