Genus Ceratium Species Of Freshwater And Marine Dinoflagellates
922 Words Mar 26th, 2016 4 Pages
Genus Ceratium includes species of freshwater and marine dinoflagellates. Most species of Ceratium are unicellular organisms that are characterized by their armored plates, two flagella, and horns. 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. 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. Another source lists the taxonomy as Kingdom Protozoa, Phylum Dinoflagellata, Class Dinophyceae, Order Gonyaulacales, and Family Ceritiaceae. 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. They contain a pellicle that is made from the cell membrane and vesicles; vesicles are composed of cross-linked cellulose, forming the plates. The pellicle divides into two structures known as the epicone and hypocone that lie above and below the transverse groove, the cingulum, respectively. Two rows of plates surround the epicone and hypocone in a particular pattern that may be inherited by offspring. These patterns may be used to…