Electronic Flora of South Australia Genus Fact Sheet
Phylum Phaeophyta – Order Cutleriales – Family Cutleriaceae
Thallus (gametophyte) erect, 5–35 cm long, flabellate or much branched subdichotomously to laterally, branches tapering, (0.5–) 2–12 mm broad, compressed to flattened. Growth trichothallic with a tuft of filaments surmounting each branch or the flabellate margin. Structure polystichous, with a small-celled phaeoplastic cortex, and a medulla 4–8 cells thick, with few phaeoplasts; phaeophycean hairs scattered, single or in small clusters.
Sporophyte dorsiventral, prostrate, flabellate, lobed, with a margin of apical cells segmenting to form a thallus 8–10 cells thick, with tufts of phaeophycean hairs on the upper surface and attachment rhizoids from the lower surface.
Reproduction: Gametophyte usually dioecious, anisogamous, with gametangia borne on branched filaments with occasional phaeophycean hairs; female gametangia ovoid, with large loculi; male gametangia elongate, with small loculi. Sporophyte with spreading surface sori of unilocular sporangia, producing motile meiospores.
Life history diplohaplontic and heteromorphic.
Type species: C. multifida (Smith) Greville.
Taxonomic notes: The sporophyte of Cutleria multifida was previously known as Aglaozonia parvula, and is commonly referred to as the Aglaozonia stage.
A genus of six species, with C. multifida widespread, and with C. mollis Allender & Kraft (1983, p. 122, figs 28, 29) from Lord Howe I.
ALLENDER, B.M. & KRAFT, G.T. (1983). The marine algae of Lord Howe Island (New South Wales): The Dictyotales and Cutleriales (Phaeophyta). Brunonia 6, 73–130.
GREVILLE, R.K. (1830). Algae Britannicae. (Edinburgh.)
The Marine Benthic Flora of Southern Australia Part II complete list of references.
Womersley, H.B.S. (14 December, 1987)
The Marine Benthic Flora of Southern Australia
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