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Name derivation:

“Drawn from the center”?  Centri – central; -tractus = drawn 

Classification:

Order Mischococcales, Family Centritractaceae (Parker 1982) or Sciadaceae (Ling and Tyler 2000)

Morphology:

Cylindrical with varying length, and containing an elongate spine at each end.  Two overlapping wall halves.  Two or more parietal or reticulate chloroplasts.

Similar genera:

Habitat:

References:

Graham, L. and  L. Wilcox  2000. Algae. Prentice-Hall

Ling, H.U. and P.A. Tyler  2000.  Australian Freshwater Algae (exclusive of diatoms).  Cramer.  (643 pp).

Parker, S. P.  1982.  Synopsis and Classification of Living Organisms (2 Volume Set).  McGraw-Hill. (2424 pp).

Smith, G. M.  1950. The fresh-water algae of the United States. McGraw-Hill, 2nd ed.