Halimeda incrassata   (J. Ellis) Lamouroux,  1816 (Algae)
Organism information awaits expert curation
Class: Bryopsidophyceae

Image copyrights: University of Hawai'i

Color: Yellowish green

Plants up to 24 cm tall. Thalli moderately calcified, erect, arising from a massive base of rhizoids. thallus hard, brittle, disc-like, oval to kidney-shaped, distinctly ribbed and or somewhat lobed. The lower segments forming an extensive, more heavily calcified stalk; the basal segments more or less fused together, cylindrical to subcuneate, branching immediately above the basal segments, mainly di to tetrachotomous, cylindrical or reniform, the outer margin entire, undulating, sometimes deeply lobed. Cortex composed of 3-5 layers of urticles, the outermost utricles generally remaining attached after decalcification, 31-54 ┬Ám in the surface diameter. Nodal medullary filaments united into a single unit. Branching mostly trichotomously, dichotomy being noticed occassionally. When the branching is dichotomous, the three branches originate respectively from the three lobes of a lower segment. One of the important characters to be observed is the complanate nature of branching i.e. the branches occur in a single plane. The segments in the upper half of the thallus are moderately calcified. The segments in the lower region of the thallus are cylindrical and about 5 mm in height. Majority of the other segments are broadly fusifom viz. broader in the middle with either and being narrower; thereby presenting a somewhat monilifom appearance. The margin of the segment is invariably trilobed, occasionally undulate.

Anatomically, there is a central medulla surrounded by a cortex. The medulla comprises vertically running coenocytic filaments. These filaments branch mostly trichotomously. From the medullary filaments many cortical filaments arise laterally which constitute the cortex. The cortical filaments are made up of 3 to 4 layers of utricles. The innermost utricle is not inflated but elongated. The secondary utricle bears on its apex 2 peripheral utricles. In surface view the peripheral utricles present an angular apperance. Nodal region all the medullary filaments are adherent in the middle.

Synonym (s)
Corallina incrassata Ellis, 1768
Halimeda incrassata forma lamourouxii J. Agardh, 1887
Halimeda incrassata forma ovata J. Agardh, 1887
Halimeda incrassata forma rotunda Barton, 1901
Halimeda tridens (J.Ellis & Solander) J.V.Lamouroux, 1812

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy, Coastal


• Andaman and Nicobar Islands, Katchall INDIA (Record: 01/1978-04/1978)
• Andaman and Nicobar Islands, Port Blair (Lat: 11.67) (Long: 92.75) INDIA
• Andaman and Nicobar Islands, Car Nicobar (Lat: 9.17) (Long: 92.78) INDIA
• Andaman and Nicobar Islands, Katchall (Lat: 7.95) (Long: 93.37) INDIA
• Andaman and Nicobar Islands, Camorta Island (Lat: 8.13) (Long: 93.5) INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Lakshadweep INDIA
• Andaman and Nicobar Islands, Nicobar Islands INDIA
• Zanzibar TANZANIA
• Andaman and Nicobar Islands, Port Blair INDIA (Record: 01/1978-04/1978)
• Andaman and Nicobar Islands, Car Nicobar INDIA (Record: 01/1978-04/1978)
• Andaman and Nicobar Islands, Camorta INDIA (Record: 01/1978-04/1978)
• Lakshadweep, Kalpeni Island INDIA (Record: 01/1987-03/1987)
• Lakshadweep, Kalpeni INDIA

Literature Source(s)
  • Bakus, JG (1993) Coral reef ecosystems Oxford and IBH publishing CO. PVT. LTD 232 pp Available at - NIO, RC, Kochi
  • Egerod, L (1974) Report of the marine algae collected on the fifth Thai-Danish Expedition of 1966. Chlorophyceae and Phaeophyceae Botanica Marina Walter de Gruyter and Co. Berlin. New York 17 130-157 Available at - NIO, Goa
  • Drew, EA (1995) Diversity of the green algal genus Halimeda in the Chagos Archipelago, central Indian Ocean Aquatic Botany Elsevier 52 143-150
  • Silva, PC; Basson, PW and Moe, RL (1996) Catalogue of the benthic marine algae of the Indian Ocean University of California Press 79 1259 pp Available at - NIO, Goa
  • Bolton, JJ; Oyieke, HA and Gwada, P (2007) The seaweeds of Kenya: Checklist, history of seaweed study, coastal environment, and analysis of seaweed diversity and biogeography South African Journal of Botany 73 76-88 Available at - NCL, Pune
  • Oza, RM and Zaidi, SH (2001) A revised checklist of Indian marine algae 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
  • Krishnamurthy, V (2006) Key to the taxonomic identification of green and brown marine algae of India Recent advances on applied aspects of Indian marine algae with reference to global scenario. Seaweed taxonomic identification, aquaculture, resource, environment, fouling and disease Central Salt and Marine Chemicals Research Institute, Bhavnagar 1 1-146 Available at - NIO, Goa
  • School of Ocean and Earth science technology Available at - http://www.soest.hawaii.edu/
  • Gopinathan, CP and Panigrahy, R (1983) Seaweed resources Mariculture potential of Andaman and Nicobar Islands-An indicative survey Bulletin of Central Marine Research Institute CMFRI, Cochin 34 47-51 Available at - http://eprints.cmfri.org.in/917/1/Bulletin_No_34-8.pdf
  • Tseng, CK (Ed.) (1983) Common seaweeds of China Science Press 316 pp Available at - NIO, Goa
  • Sundararajan, M; Rajendran, M; Kaliaperumal, N and Kalimuthu, S (1999) Studies on species of Halimeda from Lakshadweep Seaweed Research and Utilisation CMFRI 21 (1-2) 161-169 Available at - http://eprints.cmfri.org.in/7072/1/Pages_from_Seaweed_Research_And_Utilisation_Vol_21_161-169.pdf
  • Kaliaperumal, N; Kaladharan, P and Kalimuthu, S (1989) Seaweed and seagrass resources Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 162-176 Available at - http://eprints.cmfri.org.in/8213/1/Bulletin_No_43.pdf
  • Sahoo, D; Nivedita and Debasish (2001) Seaweeds of Indian coast S. B. Nangia, A. P. H. Publishing Corporation, New Delhi 283 pp Available at - NIO, Goa
  • Littler, DS; Littler, MM and Brooks, BL (1995) Marine algae and seagrasses from the Tobacco Range Fracture Zone, Belize, C.A Atoll Research Bulletin Smithsonian Institution Press 429 1-43 Available at - http://si-pddr.si.edu/dspace/handle/10088/2580

Page last updated on:2011-10-03

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