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Home / Greens
/Colonies / Non-flagellated / Crucigenia
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Click on images for larger format |
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Name derivation:
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“Cross-form” –
Cross Cruci-
form –genia” |
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Classification:
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Crucigenia Morren 1830;
11 of 70 species descriptions are currently accepted taxonomically (Guiry and Guiry 2013). Order Chlorococcales; Family Scenedesmaceae
Synonym: Crucigeniella, Dispora (at least in PhycoKey)
Synonym: Tetrapedia Reinsch 1866 is
retained in Crucigenia for lack of evidence
of differences.
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Morphology:
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Colonies formed of groups of four individual cells
forming a square. The colony is usually flat and embedded in something.
Individual cells are oval or somewhat crescent in shape. |
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Similar Genera:
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Lemmermannia and Tetrastrum are morphologically
similar and are not separated here, although they have been separated on the
basis of molecular genetics (Bock et al.
2013).
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Habitat:
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Freshwater.
Cosmopolitan. |
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References:
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Bock, C., L Wei, W-H. Kusber,
E. Hegewald, M Pažoutová,
and L Krienitz 2013. Classification of crucigenoid algae: phylogenetic position of the reinstated genus Lemmermannia, Tetrastrum
spp., Crucigenia tetrapedia, and C.
lauterbornii (Trebouxiophyceae, Chlorophyta). Journal of Phycology
49(2):329-339.
Guiry, M.D. and G.M. Guiry 2013. AlgaeBase.
World-wide electronic publication, National University of Ireland, Galway.
http://www.algaebase.org; searched on 01 August 2013. Morren, C.F.-A. 1830. Mémoire sur un végétal microscopique d'un nouveau genre, proposé
sous le nom de Crucigénie,
et sur un instrument que l'auteur nomme Microsoter, ou conservateur des petites choses. Annales
des Sciences Naturelles 20:
204-226, pl. XV. |
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