Seaweeds of the South African South Coast

 

 

 

 

 

 

 

 

 

 

 

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Order Bryopsidales

Family Derbesiaceae

Derbesia hollenbergii W.R.Taylor 1945: 75, pl. 1: figs 7-9

Plants medium green, caespitose, with an irregularly branched rhizoidal basal system and many erect filaments up to ca. 5 cm tall. Filaments 50-100 µm in diameter, infrequently branched. Chloroplasts round to spindle-shaped, 5-10 µm long. Sporangia formed laterally on the erect filaments, single, stalked; sporangia squat, with truncate apex, 100-120 x 90-100 µm , spores not seen.

Collections, ecology and regional distribution

Recorded from Muizenberg (False Bay) to Durban (18-51), from rock pools and the lower eulittoral zone.

World distribution: Also known from Mexico, Panama and the Galapagos (Guiry & Guiry, 2012).

Type locality: Galapagos, Ecuador (Taylor 1945).

 

Derbesia hollenbergii, Hluleka, with sporangia (stained slide material).

Derbesia hollenbergii, Hluleka, sporangium and stalk (stained slide material).

Derbesia hollenbergii, Hluleka, detail of sporangium and stalk (stained slide material).

Derbesia hollenbergii, zoosporangia (reproduced from Stegenga et al. 1997).

 

References Derbesia hollenbergii

Guiry, M.D. & Guiry, G.M. 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched August 2012.

Stegenga, H., Bolton, J.J. and R. J. Anderson. 1997. Seaweeds of the South African west coast. Contributions from the Bolus Herbarium 18: 655 pp.

Taylor, W.R. (1945). Pacific marine algae of the Allan Hancock Expeditions to the Galapagos Islands. Allan Hancock Pacific Expeditions 12: i-iv, 1-528, 3 figs, 100 pls.

 

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 18 November 2024.