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Electronic Flora of South Australia Genus Fact Sheet
Phylum Phaeophyta – Order Dictyosiphonales – Family Giraudiaceae
Thallus minute, with irregular fan-like discs on the host (Codium), bearing erect axes with tiers of 2–3 cells. Basal plate monostromatic, of radiating, branched filaments dividing apically. Medulla absent. Erect axes developing directly from scattered cells of the basal plate, simple or branched, filiform, tapering gradually to a uniseriate apex with a terminal phaeophycean hair; each cell of erect axes with several discoid phaeoplasts each with a pyrenoid. Growth of the erect axes trichothallic and subapical, with intercalary longitudinal divisions forming the tiers.
Reproduction: Plurilocular sporangia subterminal or terminal on erect axes, multiseriate, elongate-conical when terminal, cylindrical when intercalary, with each locule opening by an individual pore. Unilocular sporangia unknown.
Life history unknown.
Type (and only) species: F. codii Skinner & Womersley
Taxonomic notes: This little-known genus seems best associated with Giraudia, but its life history is unknown.
References:
SKINNER, S. & WOMERSLEY, H.B.S. (1984). Southern Australian taxa of Giraudiaceae (Dictyosiphonales, Phaeophyta). Phycologia 23, 161–181.
The Marine Benthic Flora of Southern Australia Part II complete list of references.
Publication:
Womersley, H.B.S. (14 December, 1987)
The Marine Benthic Flora of Southern Australia
Part II
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