155,266 species and infraspecific names are in the database, 21,864 images, 60,052 bibliographic items, 435,064 distributional records.

Taxonomy Detail

Family Ceratiaceae

Ceratiaceae Kofoid, 1907: 164.

Type of name: Ceratium Schrank, 1793

Source: Moestrup, Ø. & Calado, A.J. (2018). Süßwasserflora von Mitteleuropa. Freshwater Flora of Central Europe, Volume 6: Dinophyceae. pp. [i]-xii, [1]-560, 421 figs. Berlin: Springer Spektrum.

Original publication: Kofoid, C.A. (1907). Reports on the scientific results of the expedition to the Eastern Tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer "Albatross" from October 1904 to March 1905, Lieut. Commander L.M. Garrett, U.S.N., Commanding. IX. New species of dinoflagellates. Bulletin of the Museum of Comparative Zoology 50: 161-207.

Cells with one anterior horn and typically with 2-3 posterior horns. Cells strongly flattened dorsoventrally, dorsally convex, ventrally concave. Cingulum almost equatorial, sulcus oblique, in deep cavity. Plate formula: 4', 0a, 6'', 6c, 1–2s, 6''', 2''''. The anterior horn covered by 3 or all 4 apical plates, the posterior horns by plates 1''' and 2''' (right horn), antapical plates (middle or antapical horn), 4''' and 5''' (left horn). The apical horn is typically closed distally by a round apical plate with a more or less central pore surrounded by a number of smaller pores. The ventral plates are sometimes given separate names (x, y, z) since their interpretation as precingular, cingular and postcingular plates appears to be somewhat arbitrary. For simplicity, we have followed the latter convention, which appears to be gaining more general acceptance. Further, one of the antapical plates has been interpreted as an intercalary plate but, again, this appears to be somewhat arbitrary and we have in the present account identified both plates as antapical. One of the characteristic features of Ceratium, the large sulcal cavity (also known as the ventral chamber), through which prey is apparently ingested, was found in one species, Ceratium cornutum, to be covered by 7 very thin plates, in addition to two outer plates. These plates are very thin and readily destroyed, but it is to be expected that similar plates are present also in other species. Resting cysts typically with 3-4 horns, rarely without horns. The cyst walls are composed of cellulose and do not fossilize.

(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Lin Yongshi [Lin, Y.S.] (2009). Flora algarum marinarum sinicarum Tomus VI Pyrrophyta No. I Dinophyceae Ceratiaceae. pp. [i]-xx, 1-93, pls I-XVIII. Beijing: Science Press.

Linking to this page: http://www.algaebase.org/browse/taxonomy/detail/?taxonid=4919

Citing AlgaeBase
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 May 2019.

Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:4919

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