Electronic Flora of South Australia Genus Fact Sheet

Genus CUTLERIA Greville 1830: 59, pl. 10

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.

References:

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.

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (14 December, 1987)
The Marine Benthic Flora of Southern Australia
Part II
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