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Order Ceramiales

Family Wrangeliaceae

Gymnothamnion J. Agardh

Thalli with creeping and erect filaments, ecorticate, erect filaments arising from a short cell of creeping axis that also bears an attachment rhizoid. Cells uninucleate, apical cell transversely divided. Branching opposite-distichous. Sporangia single, terminal to subterminal. Three species and one variety are currently recognized (Guiry & Guiry 2015).

Key to species and variety

1a Thalli up to 5-10 mm long, ultimate branchlets up to 20 cells long, sporophyte producing tetrasporangia

Gymnothamnion elegans

1b Thalli up to 2 mm long, Ultimate branchlets to 10 cells long, sporophyte producing bisporangia

Gymnothamnion elegans var bisporum

References Gymnothamnion

Guiry, M.D. & Guiry, G.M. 2015. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 01 December 2015.

 

Cite this record as:

Anderson RJ, Stegenga H, Bolton JJ. 2016. Seaweeds of the South African South Coast.
World Wide Web electronic publication, University of Cape Town, http://southafrseaweeds.uct.ac.za; Accessed on 24 September 2018.