Actinoptychus senarius   (Ehrenberg) Ehrenberg,  1843 ()
Organism information awaits expert curation
Class: Bacillariophyceae

Image copyrights: Mona Hoppenrath

Color: Yellow brown

This species is easily identified by its hexagonal central, non-areolated area and the division of the valves into usually six sectors with alternating raised and depressed areas. Each of the raised sectors has a labiate process. The areolation is coarse and easily visible in water mounts.

Reproduction is general for group: both sexual and asexual.

Synonym (s)
Actinocyclus senarius Ehrenberg, 1838
Actinocyclus undulatus J.W. Bailey, 1842
Actinoptychus undulatus (J.W. Bailey) Ralfs in Pritchard, 1861
Actinocyclus undulatus Kutzing, 1844
Actinoptychus undulatus (J.W. Bailey) Ralfs, 1861
Actinoptychus undulatus Bailey ex Hustedt, 1927

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic, Coastal
Trophic Level:  Producer
Predator:  Marine microorganisms and animal larvae


• Tamil Nadu, Off Tuticorin (Lat: 8.71) (Long: 78.2) INDIA (Record: 1987-1989)
• South West Coast INDIA

Literature Source(s)
  • Subramanian, SK and Krishnamurthi, MS (1997) Studies on the species composition of neritic diatoms in the aquatic realm off Tuticorin Coast in the Gulf of Mannar-Bay of Bengal Seaweed Research and Utilisation Seaweed Research and Utilisation Association 19(1-2) 1-11 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Plankton*Net Data Provider at the Alfred Wegener Insitute for Polar and Marine Research Available at -
  • (2006) Algaebase Available at -
  • Gopinathan, CP (1984) A systematic account of the littoral diatoms of the southwest coast of India Journal of the marine biological association of India The marine biological association of India 26(1&2) 2-31 Available at - NIO, Goa

Page last updated on:2012-02-15

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