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Order Colaconematales

Family Colaconemataceae

Colaconema interpositum (Heydrich) H.Stegenga, J.J.Bolton & R.J.Anderson 1997: 250, pl. 78 (1-2)

Plants semi-endophytic, with an extensive system of endophytic filaments and numerous shorter emergent filaments. Cells of the endophytic system cylindrical or somewhat irregular, up to 12 (-15) µm in diameter and 30 µm long. Emergent filaments up to 200 µm long, branched, ca. 12.5 µm in diameter basally, tapering towards the apices, often terminating in multicellular pseudohairs; cells 2-3 times longer than broad, longer in the pseudohairs. Cells with a parietal chloroplast and a single pyrenoid; chloroplast in the endophytic cells often of irregular shape, the pyrenoid inconspicuous. Monosporangia terminal on emergent filaments and their laterals, subcylindrical, 20-22 x 9-11 µm.

Collections, ecology and regional distribution

Recorded from False Bay near Cape Point (Platbank) to Stilbaai (17-26), on Codium spp.

World distribution: South African endemic.

Notes: See Stegenga et al. (1997) for comparisons with records from New Zealand.


Colaconema interpositum. 1,2. Thallus details with monosporangia. (Reproduced from Stegenga et al. 1997).


References Colaconema interpositum

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,; Accessed on 26 February 2024.