The Collaborative International Dictionary of English v.0.48:

Schizomycetes \Schiz`o*my*ce"tes\, n. pl., [NL., fr. Gr. ? to
   split + ?, -?, a fungus.] (Biol.)
   An order of Schizophyta, including the so-called fission
   fungi, or bacteria. See Schizophyta, in the Supplement.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Schizomycetes
    n 1: a former classification [syn: Schizomycetes, class
         Schizomycetes]