Zoospore ultrastructure of members in the order Spizellomycetales:

The Order Spizellomycetales includes five genera (Wakefield et al. 2010):

• Kochiomyces (1 species)
• Spizellomyces (8 species) (to see zoospore summary double click on the name)
• Triparticalcar (1 species)
• Gaertneriomyces (3 species)
• Powellomyces (2 species)
  

Genera may be distinguished based on zoospore ultrastructure (see illustrations and references below).

Kochiomyces zoospore is illustrated in the figure on left below, and Triparticalcar on right

Gaertneriomyces zoospore is illustrated in the figure on left above, and Powellomyces on right

References:

• Barr, D.J.S. 1980. An outline for the reclassification of the Chytridiales, and for a new order, the Spizellomycetales. Can. J. Bot. 58: 2380-2394.
• Barr, D.J.S. 1981b. Ultrastructure of the Gaertneriomyces zoospore (Spizellomycetales,
• Chytridiomycetes). Can. J. Bot. 59: 83-90.
• Barr, D.J.S. 1984a. Cytological variation in zoospores of Spizellomyces (Chytridiomycetes). Can. J. Bot. 62: 1202-1208.
• Barr, D.J.S. 1984b. The classification of Spizellomyces, Gaertneriomyces, Triparticalcar, and Kochiomyces (Spizellomycetales, Chytridiomycetes). Can. J. Bot. 62: 1171 -1201.
• Barr, D.J.S. and P.M.E. Allan. 1981. Ultrastructure of Kochiomyces and Triparticalcar zoospores (Spizellomycetales, Chytridiomycetes). Can. J. Bot. 59: 649-661.
• Barr, D.J.S. and N.L. Desaulniers. 1986. Four zoospore subtypes in the Rhizophlyctis-Karlingia complex (Chytridiomycetes). Can. J. Bot. 64: 561-572.
• Koch, W.J. 1958. Studies of the motile cells of chytrids. 11. Internal structure of the body observed with light microscopy. Amer. J. Bot. 45: 59-72.
• Longcore, J.E., D.J.S. Barr and N. Desaulniers. 1995. Powellomyces, a new genus in the Spizellomycetales. Can. J. Bot. 73: 1385-1390.
• Powell, M.J. 1978. Phylogenetic implications of the microbody lipid globule complex in zoosporic fungi. BioSystems 10: 167-180.
• Powell, M.J. 1979. The structure of microbodies and their associations with other organelles in zoosporangia of Entophlyctis variabilis. Protoplasma 98: 177-198.
• Wakefield, W.S., M.J. Powell, P.M. Letcher, D.J.S. Barr, P.F. Churchill, J.E. Longcore and W.-F. Chen. 2010. A molecular phylogenetic evaluation of the Spizellomycetales. Mycology 102 (3): 596-604.