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Click on images for larger format |
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Name derivation: |
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Classification: |
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Goniomonas Stein 1878; all four species descriptions are currently accepted taxonomically (Guiry and Guiry 2013).Order Cryptomonadales; Family Cryptomonadaceae
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Morphology: |
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Colorless flattened flagellated unicells lacking plastidial complex, considered ancestral (primitive) in the cryptomonads. The furrow-gullet complex is anterior rather than anterior-lateral (other cryptomonads). Proteinaceous periplast is visible in light microscope. Ejectosomes similar to other cryptomonads are present. Flagella have an unusual ultrastructure. A slightly shorter flagellum has mastigonemes, the longer lacks them (Martin-Cereceda et al. 2010). Only two genera of described cryptomonads, Goniomonas and Cyathomonas, are colorless heterotrophs (Martin-Cereceda et al. 2010).
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Similar genera: |
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Based on rRNA sequences Goniomonas spp. are considered to be closely related to the host component of cryptomonads, many of which contain a photosynthetic endobiont (McFadden et al. 1994). |
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Habitat: |
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Freshwater and marine plankton. |
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References: |
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Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 February 2013. Martin-Cereceda, M., E.C. Roberts, E.C. Wootton, E. Bonaccorso, P. Dyal, A. guinda, D. Rogers, C.J. Wright, and G. Novarino 2010. Morphology, ultrastructure, and small subunit rDNA phylogeny of the marine heterotrophic flagellate Goniomonas aff. amphinema. J. Eukcaryotic Microbiol. 57(2):159-170. McFadden, G.I., P.G. Gilson, and D.R.A. Hill 1994. Goniomonas: rRNA sequences indicate that this phagotrophic flagellate is a close relative of the host component of cryptomonads. Eur. J. Phycol. 29:29–32. Stein, F. von 1878. Der Organismus der Infusionsthiere. III. Flagellaten I. pp. 1-154. Leipzig: Engelmann. |
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