Halimeda opuntia   (Linnaeus) J.V. Lamouroux,  1812 (Algae)
Organism information awaits expert curation
Taxonomy
Kingdom:Plantae
Phylum:Chlorophyta
Class: Bryopsidophyceae
Order:Bryopsidales
Family:Halimedaceae

Image copyrights: Teresa Zubi

Description
Size: 3 to 8 mm high,4 to 10 mm wide,and 0.5 to 7 mm thick.

Color: Green to cream.

Branching generally in more than one plane. Branches composed of moderately calcified flat segments with a distinct central rib, generally reniform to flabellate with the upper margin entire, sinuate to deeply lobed. It branches sparsely, dichotomously and trichotomously. The segments are smaller and highly variable. Some are cylindrical, some cuneate and some renifom. Some are ribbed. The margin of the segment is entire or predominantly trilobed. Some of the segments are oriented slightly in different directions so that they look distorted.

Cortex consisting of 5 layers of utricles formed by repeated dichotomies from the medullary filaments; outermost utricles adhere slightly after decalcification, hexagonal in surface view, 23 by 40 to 50 m in transverse section; secondary utricles about 17 m wide. Central medullary filaments extend along the segments, terete and trichotomously branched, with evident constrictions at a short distance above the point of branching. The vertical medullary filaments are mostly trichotomously branched. Lateral cortical filaments arise from the medullary filaments. In the cortical filaments there are 3 to 4 layers of utricles. The secondary utricle is elongated and bears 3 to 6 peripheral utricles at its tip which are rounded in surface view. After decalcification, the peripheral utricles remain separated. At the nodal region the medullary filaments fuse in pairs to a longer distance, thereby showing an extended fusion.


Synonym (s)
Flabellaria multicaulis Lamarck, 1813
Halimeda multicaulis (Lamarck) Lamouroux, 1816
Halimeda triloba Decaisne, 1842
Halimeda opuntia f. triloba (Decaisne) J. Agardh, 1887
Corallina opuntia Linnaeus, 1758
Fucus prolifer M.Blanco, 1837

Common Name (s)
Economic Importance and Threats
(Source of growth regulators such as auxin,gibberellin,cytokinin; has antibacterial and antifungal properties.)

Ecology
Habitat:  Reef Associated

Biogeography


• Tamil Nadu, Gulf of Mannar (Lat: 8.5) (Long: 79) INDIA
• Lakshadweep INDIA (Record: 1903)
• Andaman and Nicobar Islands, Andaman Islands INDIA
• BANGLADESH
• MYANMAR
• INDIA
• MADAGASCAR
• MALDIVES
• MAURITIUS
• MOZAMBIQUE
• Andaman and Nicobar Islands, Nicobar Islands INDIA
• SEYCHELLES
• SRI LANKA
• TANZANIA
• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Andaman and Nicobar Islands, Andaman Islands (Lat: 11.12) (Long: 92.82) INDIA
• Andaman and Nicobar Islands, Nicobar Islands (Lat: 8) (Long: 93.5) INDIA
• Tamil Nadu, Off Tuticorin INDIA (Record: 12/1958-05/1959) (Depth: 12-17 mts)
• Lakshadweep (Lat: 10.5) (Long: 73) INDIA
• Lakshadweep, Agatti (Lat: 10.83) (Long: 72.2) INDIA
• Lakshadweep, Bangaram (Lat: 10.93) (Long: 72.28) INDIA
• Lakshadweep, Kavaratti (Lat: 10.57) (Long: 72.62) INDIA
• Tamil Nadu, Krusadai Island, Galaxea Reef INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Palk Bay INDIA
• Lakshadweep, Andrott Island INDIA (Record: 01/1987-03/1987)
• Tamil Nadu, Tuticorin INDIA
• Tamil Nadu, Mandapam INDIA
• Lakshadweep INDIA
• Andaman and Nicobar Islands INDIA
• Andaman and Nicobar Islands, Car Nicobar Island INDIA
• Andaman and Nicobar Islands, Great Nicobar Island INDIA

Literature Source(s)
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  • Phang, SM (2006) Seaweed resources in Malaysia: Current status and future prospects 9(2) 185-202 Available at - NCL, Pune
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  • 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
  • Sundararajan, M; Selvaraju, C and Krishnamurthy, V (1996) On some species of Halimeda Lamour from Indian waters Seaweed Research and Utilisation Seaweed Research and Utilisation Association 18(1-2) 21-33 Available at - NIO, Goa
  • Krishnamurthy, V and Jayagopal, K (1995) Calcareous algae of the Galaxea Reef, Krusadi Island, Tamil Nadu Seaweed Research and Utilisation Seaweed Research and Utilisation Association 17(1-2) 117-121 Available at - NIO, Goa
  • Untawale, AG; Dhargalkar, VK and Deshmukhe, GV (2000) Prioritization of potential sites for marine biodiversity conservation in India Setting biodiversity conservation priorities for India: Summary of the findings and conclusions of the biodiversity conservation prioritization project World Wide Fund for Nature - India, New Delhi (India) Available at - http://drs.nio.org/drs/bitstream/2264/1614/2/Setting_Biodiversity_Conserv_Priorities_India_2000_1_104.pdf
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Page last updated on:2011-09-26

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