Corynomorpha prismatica   (J. Agardh) J. Agardh,  1876 (Algae)
Organism information awaits expert curation
Class: Florideophyceae

Color: Glistening dark purple in older parts and lighter shades in younger parts.

Thallus form and type: Cylindrical and sub-cartilaginous

Substratum: Intertidal rocks

Occurrence: Supra littoral zone, mostly in tide pools

Season: July-November

Abundance: Scanty

Plants in tufts, several growing together in patches over large areas, quill-like, gregarious, rigid, erect. Younger plants developing in the midst of older ones from the basal disc. Disc very small, attached to the calcareous and hard substrate. Thallus 15 cm or more in height, 3-4 mm thick, generally simple, terete in living conditions. Apex obtuse. Branching of thallus not infrequent, branches dichotomous, once or twice or monopodial 3 to 4 forklings in succession.

Inner core of thallus of loosely interwoven longitudinal filaments, laxly branched, thick-walled, 6-10 µ diameter. Stellate cells intermingled with the medullary inner core of filaments, 12-18 µ across, arms of stellate cells varying in length up to 80 µ; slender thick-walled rhizoids running parallel or cris-cross, connecting the stellate cells and medullary filaments, 3-5 µ wide. Cortical layer many layered, divisible into inner and outer region. Inner region 3-5 layered with irregular roundish cells, 8-12 µ in diameter; cells being progressively smaller and more rounded towards and near the outer region. Outer region compact, 3-4 layered, uniform with rounded cells, thick walled, 6 µ in diameter. Cells of outermost layer slightly elongated, 3 µ wide, up to 10 µ long. Cortical layer with pigmentation.

Reproductive structures, sexual and asexual in nemathecia, in younger portions of thallus just below the tip, circumferential. Sexual plants dioecious male plants slightly smaller than female plants. Spermatangia catenate in nemathecial sori just below tips, covering the entire circumference of the fertile tip. Carpogonia in ampullary clusters. Cystocarps small, numerous, immersed in much swollen tips. Tetrasporangial nemathecia over larger area than the sexual nemathecia, developed circumferentially. Tetraspores cruciately divided or irregularly divided or obliquely transverse, uninucleate.

Synonym (s)
Acrotylus prismaticus (J. Agardh) J. Agardh, 1851
(Homotypic synonym)
Dumontia prismatica J. Agardh, 1841
(Homotypic synonym)
Gymnophlaea prismatica (J. Agardh) Kutzing, 1849
(Homotypic synonym)

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated, Coastal


• Tamil Nadu, Kanniyakumari (Lat: 8.08) (Long: 77.57) INDIA
• Gujarat, Okha (Lat: 22.48) (Long: 69.1) INDIA
• Tamil Nadu INDIA
• Tamil Nadu, Chennai (Lat: 13.09) (Long: 80.29) INDIA
• Tamil Nadu, Tuticorin (Lat: 8.78) (Long: 78.13) INDIA
• Gujarat, Gulf of Kachchh (Lat: 22.6) (Long: 69.5) INDIA
• Gujarat, Okha Port (Lat: 22.47) (Long: 69.08) INDIA
• Tamil Nadu (Lat: 11) (Long: 78) INDIA
• Tamil Nadu, Arockiapuram Coast (Lat: 8.10) (Long: 77.57) INDIA (Record: 10/1995-11/1995)
• Gujarat, Gulf of Kachchh INDIA
• Gujarat, Okha Port INDIA (Record: 05/2004-06/2004)
• Lakshadweep, Cora Divh (Lat: 13.75) (Long: 72.25) INDIA (Record: 12/1988) (Depth: 18-70 mts)
• Lakshadweep, Sesostris (Lat: 12.91) (Long: 72.08) INDIA (Record: 12/1988) (Depth: 18-70 mts)
• Lakshadweep, Bassas de Pedro (Lat: 13.5) (Long: 72.58) INDIA (Record: 12/1988) (Depth: 18-70 mts)
• Gujarat, Veraval INDIA

Literature Source(s)
  • Srinivasan, KS (1969) Phycologia Indica: Icones of Indian marine algae Botanical Survey of India, Calcutta 1 52 pp Available at - NIO, Goa
  • Jassund, E (1977) Marine algae in Tanzania VII Botanica Marina Walter de Gruyter, Berlin 20 415-425 Available at - NIO, Goa
  • 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
  • Subba Rao, NV and Sastry, DRK (2005) Fauna of Marine National Park, Gulf of Kuchchh (Gujarat) ZSI 79 pp Available at - NCL, Pune
  • 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
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Roslin, AS; Rosakutty, PJ and Lazarus, S (1997) A study on the flora and fauna of Arockiapuram Coast of Tamil Nadu Seaweed Research and Utilisation Seaweed Research and Utilisation Association 19(1-2) 55-61 Available at - NIO, Goa
  • (2006) Algaebase Available at -
  • (1997) Coastal marine environment of Gujarat 178pp Available at - NIO, Goa
  • Thakur, MC; Reddy, CRK and Jha, B (2008) Seasonal variation in biomass and species composition of seaweeds stranded along Port Okha, northwest coast of India Journal of Earth System Science Springer 117(3) 211–218 Available at -
  • Ambiye, V and Untawale, AG (1992) Deep water marine algal flora of the submerged banks off west coast of India Oceanography of the Indian Ocean Oxford and IBH, New Delhi 247-252 Available at -
  • Jha B, Reddy C.R.K, Thakur M C and Rao M (2009) Seaweeds of India The Diversity and Distribution of seaweeds of Gujarat Coast Springer 211pp Available at - NIO

Page last updated on:2012-12-11

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