Dictyurus purpurascens   Bory de Saint-Vincent,  1834 (Algae)
Organism information awaits expert curation
Class: Florideophyceae

Image copyrights: ABC Taxa

Color: Shows light red tinge when young, becomes paler and dirty red with age.

Plants with pretty articulated mantle-like thallus forming a sac-like network around the central main stem. Main stem erect, unbranched or only seldom branched until 6 cm high. Main axis bear transversal sympodial side branches and monosiphounous side branches, which grow together forming a fine reticulate network around the main axis. Side branches distichously arranged, finally forming a closed continuous network. Thallus quadrangular in cross section or in older plants, tending to be octangular. In the older plants the mantle gets destroyed to a greater portion, when the main axis alone with the remnants of the thallus at its upper portions persists, presenting quite a contrasting appearance.

Tetraspores in tetrasporic plants in stichidia at upper ends of transversal side-branches. Stichidia exposed outside the network when ripe. Spermatangia in complicated branch system of spermatangial branches. Spermatangial branch system in 4 rows along the quadrangular shoots or in 8 rows in octangular shoots. Compound spermatangial branch system 1-17 mm or more in length. Spermatangial branches cells up to 10-15 µ or 30-40 µ across or mores. Connecting filaments of spermatangial branch 18-25 µ across. Cystocarps in female plants producing carpospores.

Synonym (s)

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Lakshadweep INDIA
• Andaman and Nicobar Islands, Nicobar Islands INDIA
• Tamil Nadu, Off Tuticorin INDIA (Record: 12/1958-05/1959) (Depth: 14-18 mts)
• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Kanniyakumari INDIA
• Tamil Nadu, Tuticorin INDIA
• Tamil Nadu, Hare Island INDIA
• Tamil Nadu, Kanniyakumari INDIA
• Tamil Nadu, Mandapam INDIA

Literature Source(s)
  • DigiMus2.0 – The Software for Digital Museum of Seaweed Specimen Records Available at - http://www.niobioinformatics.org/digimus.php
  • 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
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • (2006) Algaebase Available at - http://www.algaebase.org/
  • Sundaram, KS; Sarvesan, R; Mohamed, KH and Shanbhogue, SL (1969) Catalogue of molluscs, prawns, stomatopods and marine algae in the reference collections of the central marine fisheries research institute Bulletin Of Central Marine Fisheries Research Institute CMFRI, Cochin 9 1-52 Available at - http://eprints.cmfri.org.in/570/1/Bulletin_9.pdf
  • Srinivasan, KS (1969) Phycologia Indica: Icones of Indian marine algae Botanical Survey of India, Calcutta 1 52 pp Available at - NIO, Goa
  • Varma, RP (1960) Flora of the pearl beds off Tuticorin Journal of the Marine Biological Association of India Marine Biological Association of India 2 (2) 221-225 Available at - http://eprints.cmfri.org.in/1405/1/Prasanna_221-225.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
  • Rao, MU (1968) Additions to the algal flora of the Gulf of Mannar and Palk bay from Mandapam area Journal of the marine biological association of India The marine biological association of India 10(2) 366-369 Available at - NIO, Goa

Page last updated on:2011-06-03

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