Coscinodiscus radiatus   Ehrenberg,  1840 (Diatom)
Organism information awaits expert curation
Taxonomy
Kingdom:Chromista
Phylum:Ochrophyta
Class: Bacillariophyceae
Order:Coscinodiscales
Family:Coscinodiscaceae

Image copyrights: M. Hoppenrath

Description
Size: 30-180 µm.

Girdle view: Cells discoid, flat, coin shaped. Numerous cocciform chloroplasts.
Valve view: Indistinct central rosette of slightly larger areolae. Areolae in radial rows, sometimes in indistinct decussating arcs. Small labiate processes at the points of origin of incomplete striae (interstitial meshes). No hyaline lines. One marginal ring of processes, including two slightly larger processes visible with light microscopy as indentations of the valve margin, ca. 135˚ apart. The smaller marginal processes barely discernible.

Distinctive features: Flat cells, large areolae. Distinguished from Coscinodiscus argus by areolae of uniform size throughout the entire valve face and from Coscinodiscus marginatus by smaller areolae in more regular radial rows.


Synonym (s)
Coscinodiscus borealis Ehrenberg, 1862

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Estuarine, Coastal

Biogeography


• Goa, Mandovi and Zuari Estuary INDIA (Record: 11/1979-10/1980)
• Goa, Zuary Estuary, Dona Paula INDIA
• Kerala, Kadinamkulam Backwater INDIA (Record: 10/1991-09/1992)
• Orissa, Mahanadi Estuary (Lat: 20.28) (Long: 86.70) INDIA
• Tamil Nadu, Off Tuticorin (Lat: 8.71) (Long: 78.2) INDIA (Record: 1987-1989)
• Goa, Dona Paula Bay INDIA (Record: 03/2007)
• Bay of Bengal INDIA (Record: 06/07/2001-02/08/2001)
• Kerala, Kochi Backwaters INDIA (Record: 1970-1972)
• Karnataka, Old Port of Mangalore (Lat: 12.86) (Long: 74.88) INDIA (Record: 28/12/2005 - 13/01/2006)
• Maharashtra, Mumbai (Lat: 18.9) (Long: 72.66) INDIA (Record: 11/2001-10/2002, 04/2002-05/2002)
• Kerala, Vaadi INDIA
• Kerala, Punnapra INDIA
• Kerala, Azheekode INDIA
• Kerala, Balathuruthu INDIA
• Kerala, Kodikkal INDIA
• Kerala, Mahe INDIA
• Tamil Nadu, Kaduviyar estuary INDIA (Record: 10/2005-09/2006)
• West Coast INDIA
• Tamil Nadu, Mandapam INDIA (Record: 07/2008-12/2008)
• Goa, Dona Paula Bay (Lat: 15.45) (Long: 73.8) INDIA
• West Bengal, Hugli Matla Estuary INDIA
• West Bengal, Sundarbans INDIA
• West Bengal, Sundarbans INDIA

Literature Source(s)
  • Redekar, PD and Wagh, AB (2000) Planktonic diatoms of the Zuari estuary, Goa (West coast of India) Seaweed Research and Utilisation Seaweed Research and Utilisation Association, Tamil Nadu 22 (1 & 2) 107-112 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Plankton*Net Data Provider at the Alfred Wegener Insitute for Polar and Marine Research Available at - http://dx.doi.org/10013/de.awi.planktonnet
  • Hasle, GR and Syvertsen, EE (1997) Marine diatoms Identifying marine phytoplankton Academic Press, San Diego, USA 5-385 Available at - NIO, Goa
  • Sobha, V; Rammohan, A; Santhosh, S and Thara, JC (2007) Impact assessment of retting activity on the abundance of phytoplankton species of Kadinamkulam Lake, Southern Kerala Seaweed Research and Utilisation Seaweed Research and Utilisation Association, Tamil Nadu, India 29(1 & 2) 187-195 Available at - NIO, Goa
  • (2006) Algaebase Available at - http://www.algaebase.org/
  • Naik, S; Acharya, BC and Mohapatra, A (2009) Seasonal variations of phytoplankton in Mahanadi estuary, east coast of India Indian Journal of Marine Sciences 38(2) 184-190 Available at - http://nopr.niscair.res.in/bitstream/123456789/4669/1/IJMS%2038%282%29%20184-190.pdf
  • 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
  • Devassy, VP; and Goes, JI (1988) Phytoplankton Community Structure and Succession in a Tropical Estuarine Complex (Central West Coast of India) Estuarine, Coastal and Shelf Science Academic Press 27(6) 671-685 Available at - http://dx.doi.org/10.1016/0272-7714(88)90074-1
  • Kumar, MSR; Ramaiah, N and Tang, D (2009) Morphometry and cell volumes of diatoms from a tropical estuary of India Indian journal of marine sciences. NISCAIR 38(2) 160-165 Available at - http://drs.nio.org/drs/handle/2264/3371
  • Paul, JT; Ramaiah, N; Gauns, M and Fernandes, V (2007) Preponderance of a few diatom species among the highly diverse microphytoplankton assemblages in the Bay of Bengal. Marine Biology springerlink 152(1) 63-75 Available at - http://drs.nio.org/drs/bitstream/2264/637/4/Mar_Biol_152_63.pdf
  • Gopinathan, CP (1972) Seasonal abundance of phytoplankton in the Cochin backwaters Journal of the Marine Biological Association of India Marine Biological Association of India,Cochin 14(2) 568-577 Available at - http://eprints.cmfri.org.in/1566/
  • Harnstrom, k; Karunasagar, I and Godhe, A (2009) Phytoplankton species assemblages and their relationship to hydrographic factors-a study at the old port in Mangalore, coastal Arabian sea Indian journal of marine sciences NISCAIR 38(2) 224-234 Available at - http://nopr.niscair.res.in/handle/123456789/4673
  • D’Costa, PM and Anil, AC (2010) Diatom community dynamics in a tropical, monsoon-influenced environment: West coast of India Continental Shelf Research Elsevier B.V. 30(12) 1324-1337 Available at - http://dx.doi.org/10.1016/j.csr.2010.04.015
  • Sanilkumar, M G; Dr.Joseph, K J; Dr. Saramma, A V (2009) Planktonic Microalgae Microalgae in the Southwest Coast of India 34-114 Available at - http://dyuthi.cusat.ac.in/xmlui/purl/1922
  • Perumal, NV; Rajkumar, M; Perumal, P and Rajasekar, KT (2009) Seasonal variations of plankton diversity in the Kaduviyar estuary, Nagapattinam, southeast coast of India Journal of Environmental Biology Academy of Environmental Biology 30(6) 1035-1046 Available at - www.jeb.co.in/journal_issues/200911_nov09/paper_19.pdf
  • Subrahmanyan, R and Sarma, AHV (1960) Studies on the phytoplankton of the west coast of India Part III. Seasonal variation of the phytoplankters and environmental factors Indian Journal of Fisheries Indian Journal of fisheries for the Indian council of Agricultural research, Cochin, India 7 (2) 307-336 Available at - http://eprints.cmfri.org.in/1899/1/Article_04.pdf
  • Anantharaman, P; Thirumaran, G; Arumugam, R; Kannan, RR; Hemalatha, A; Kannathasan, A; Sampathkumar, P and Balasubramanian, T (2010) Monitoring of Noctiluca bloom in Mandapam and Keelakarai coastal waters, southeast coast of India Recent Research in Science and Technology 2(10) 51-58 Available at - http://recent-science.com/article/viewFile/4386/2174
  • Patil, JS and Anil, AC (2005) Biofilm diatom community structure: Influence of temporal and substratum variability Biofouling Taylor & Francis 21(3/4) 189 – 206 Available at - http://nicmas.nio.org/eprints/Biofouling_21_189.pdf
  • Shetty, HPC; Saha, SB and Ghosh, BB (1963) Observations on the distribution and fluctuations of plankton in the Hooghly-Matlah estuarine system, with notes on their relation to commercial fish landings Indian Journal of Fisheries Indian Council of Agricultural Research 8 (2) 326-363 Available at - NIO, Goa
  • Banerjee, K; Mitra, A; Majumdar, S; Choudhary, A and Bhattacharyya, DP (2001) Phytoplankton spectrum in Sundarbans Journal of Indian Ocean Studies Society for Indian Ocean Studies, New Delhi, India 9(1) 120-126 Available at - NIO, Goa

Page last updated on:2012-03-22

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