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Name derivation:

"Pre-green" referring to the presence of both chlorophyll a and b found in the chlorophyceae. May also contain chlorophyll c (Larkum et al. 1994).


Prochloron  R.A.Lewin  1977;  the single species description is currently accepted taxonomically (Guiry and Guiry 2013).

Order Chroococcales;  Family Prochloraceae



Circular flattened unicells ~ 10 um in diameter.


Similar genera:




Symbionts, both extracellular and endocellular (Hirose et al.) of ascidians (tunicates) such as Lissoclinum punctatum found in the Pacific Ocean near the Palau Islands and Papua New Guinae. Host ascidians bearing Prochloron cells are found in four genera of the family Didemnidae, namely, Didemnum, Trididemnum, Lissoclinum, and Diplosoma (Yokobiri et al. 2006).



Guiry, M.D. and G.M. Guiry  2013.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.  http://www.algaebase.org; searched on 10 September 2013.

Hirose, E., T. Maruyama, L. cheng, and R.A. Lewin 1996. Intracellular symbiosis of a photosynthetic prokaryote, osp., in a colonial ascidian. Invertebrate Biology 115(4):343-348.

Larkum, A.W.D, C. Scaramuzzi, G.C. Cox, R.G. Hiller, and A.G. Turner 1994. Light-harvesting chlorophyll c-like pigment in Prochloron. Proc. Natl. Acad. Sci. Usa 91:679-683.

Lewin, R.A.  1977.  Prochloron, type genus of the Prochlorophyta.  Phycologia 16: 217.

Yokobori, S., A. Kurabayashi, B.A. Neolan, T. Maruyama, and E. Hirose 2006. Multiple origins of the ascidian-Prochloron symbiosis: Molecular phylogeny of photosymbiotic and non-symbiotic colonial ascidians inferred from 18S rDNA sequences. Molecular Phylogenetics and Evolution 40(1):8-19.