Seaweeds of the South African South Coast

 

 

 

 

 

 

 

 

 

 

 

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Order Colaconematales

Family Colaconemataceae

Colaconema pectinatum (Kylin) J.T.Harper & G.W.Saunders 2002: 473

Plants with a multicellular filamentous basal system and several well-developed erect filaments. Erect axes up to 2 or 3 mm tall, sparingly branched, but with numerous small clusters of mono- and/or tetrasporangia. Erect axes 6-8 µm in diameter, the cells 3-6 times as long as broad. Sporangial clusters distichously arranged, one or two per main axial cell. Monosporangia terminal or lateral, 10-12 x 7-8 µm; tetrasporangia in identical positions, 17-21.5 x 12-14.5 µm, cruciately divided. Gametophytes minute, with a unicellular base and one or two very short erect axes (only known from culture).

Collections, ecology and regional distribution

Recorded from Doring Bay on the west coast to Tsitsikamma (8-32), on subtidal sessile animals (e.g. sponges) or sometimes on kelp.

World distribution: Australia, California, Atlantic Europe (localities from records in Guiry & Guiry 2014).

Type locality: Sweden (Silva et al. 1996).

Note: Stegenga (1985) provides more information, and detailed illustrations on South African material of this species (as Audouinella pectinata) and discusses its relationship with close relatives.

 

Colaconema pectinatum, erect axes with monosporangia. (Reproduced from Stegenga et al. 1997; as Audouinella pectinata).

 

References Colaconema pectinatum

Guiry, M.D. & Guiry, G.M. 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 30 October 2014.

Harper, J.T. & Saunders, G.W. (2002). A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov.. European Journal of Phycology 37: 463-475.

Stegenga, H. (1985). The marine Acrochaetiaceae (Rhodophyta) of southern Africa. South African Journal of Botany 51: 291-330, 25 figs, 1 table.

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.

 

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 19 December 2024.