Ceratium dens [Status Unaccepted]   Ostenfeld et Schmidt,  1901 (Dinoflagellate)
Organism information awaits expert curation
Class: Peridinea

Image copyrights: Oxford University Press

Ceratium dens is a large, robust species and has a body of varied size and shape, sometimes nearly higher than wider, but occasionally the width evens and may exceed the length. This species is characterized by antapical horns that direct outward, without curving perceptibly forward like in Ceratium tripos. Generally, the development of these horns is nearly different from one to another even though sometimes the difference is too small; both, especially the right one, can appear very reduced or rudimentary. Epitheca low, half as long as broad. Apical horn well developed, rather uniformly broad, broadened at base; even in the intermediate cells of chains rather long, generally longer than right posterior horn; at times shorter. Hypotheca low, double as broad as long with proportionately slightly inclined posterior contour. Left horn, strikingly short measuring only 2/3 of transdiameter, inclined to left and somewhat ventral and directed backwards, straight or bent, with short, closed apex. Right horn bent round uniformly from the base, divergent towards apical horn, long, somewhat narrower than both the other horns. Armour sculpture very robust; humps, irregularly bent lists and large clear pores.

Synonym (s)
Ceratium dens var. reflexa Schmidt, 1901

Common Name (s)
Economic Importance and Threats

Habitat:  Estuarine


• Andaman and Nicobar Islands, Andaman Islands (Lat: 10) (Long: 93) INDIA
• Tamil Nadu, Cooum Estuary (Lat: 13.16) (Long: 80.26) INDIA (Record: 04/1998-03/1999)
• West Coast INDIA
• Red Sea
• Gulf of Aden
• Arabian Sea INDIA

Literature Source(s)
  • Eashwar, M; Kuberaraj, K; Nallathambi and Govindarajan, G (2001) A note on the plankton from Barren Island region, Andamans Current Science 81(6) Available at - http://www.iisc.ernet.in/currsci/sep252001/651.pdf
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • (2006) Algaebase Available at - http://www.algaebase.org/
  • Saad, MAH (1984) Proceedings of the Symposium on Coral Reef environment of the Red Sea King Abdulaziz University, Saudi Arabia 1-681 Available at - NIO, RC Kochi
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Eswari, YNK and Ramani Bai, R (2002) Distribution and abundance of phytoplankton in the estuarine waters of Chennai, south east coast of India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 44(1 & 2) 205-211 Available at - NIO, Goa
  • Pech-Pacheco, JL; Alvarez-Borrego, J; Orellana-Cepeda, E and Cortes-Altamirano, R (1999) Diffraction pattern applicability in the identification of Ceratium species Journal of Plankton Research 21(8) 1455-1474 Available at - http://plankt.oxfordjournals.org/cgi/reprint/21/8/1455.pdf
  • Subrahmanyan, R (1968) The Dinophyceae of the Indian seas Memoir II, Part I Marine Biological Association of India, India 118 pp Available at - http://eprints.cmfri.org.in/2446/

Page last updated on:2012-02-27

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