Genus Ceratium Species Of Freshwater And Marine Dinoflagellates

922 Words Mar 26th, 2016 4 Pages
Description[edit source | edit]
Genus Ceratium includes species of freshwater and marine dinoflagellates.[1] Most species of Ceratium are unicellular organisms[1] that are characterized by their armored plates, two flagella, and horns.[2] Species of Ceratium are found worldwide and are of concern due to their blooms.

Taxonomy[edit source | edit]
The genus was originally published in 1793 by Shrank, F. von Paula.[3] The taxonomy of Ceratium varies among several sources. One source states the taxonomy as such: Kingdom Chromista, Phylum Miozoa, Class Dinophyceae, Order Gonyaulacales, and Family Ceratiaceae.[3] Another source lists the taxonomy as Kingdom Protozoa, Phylum Dinoflagellata, Class Dinophyceae, Order Gonyaulacales, and Family Ceritiaceae.[4] The taxobox includes Kingdom Chromalveolate. Thus, sources disagree on the higher levels of classification but agree on lowers levels.

Appearance[edit source | edit]
Ceratium species belong to the group of dinoflagellates known as dinophysiales, meaning they contain armored plates.[2] They contain a pellicle that is made from the cell membrane and vesicles; vesicles are composed of cross-linked cellulose, forming the plates.[2] The pellicle divides into two structures known as the epicone and hypocone that lie above and below the transverse groove, the cingulum, respectively.[2] Two rows of plates surround the epicone and hypocone in a particular pattern that may be inherited by offspring.[2] These patterns may be used to…

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