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Electronic Flora of South Australia Genus Fact Sheet
Phylum Rhodophyta – Family Delesseriaceae
Thallus branched from the midrib, branches more-or-less linear with obtuse apices, becoming heavily corticated; holdfast discoid, becoming fibrous. Structure. Apical cells segmenting to give an axial filament and 4 pericentral cells, the lateral ones producing second-order rows (sometimes visible as faint veins) each cell of which forms a third-order row with all rows reaching the blade margin. Transverse section of blades showing irregular arrangement of cortical cells, with large and small cells and rhizoids intermixed.
Reproduction: Reproductive organs borne on small bladelets arising from the midrib. Gametophytes probably dioecious. Procarps on successive transverse pericentral cells, with 2 sterile groups and a carpogonial branch; carposporophytes with a basal fusion cell and few carposporangia. Cystocarps ovoid, sessile and sunken on the midrib of blades, with a thick pericarp and basal and surrounding network tissues, with a conspicuous peripheral space, around the carposporophyte. Spermatangial sori not observed.
Tetrasporangial sori on the small proliferous bladelets, tetrasporangia cut off from mid cortical cells and covered by small outer cortical cells, subspherical, tetrahedrally divided.
Type species: C. coriifolia (Harvey) Papenfuss 1956: 159.
Taxonomic notes: A genus of 2 species, the type from Australia and C. jadinii (Børgesen) Papenfuss (1956, p. 159) from Mauritius. Both species merit further detailed study.
Confusion involving the names Chauvinia Harvey, Chauvinia Bory, Phitymophora J. Agardh and Vinassaella G. de Toni was discussed by Papenfuss (1956), who renamed the genus Chauviniella.
References:
PAPENFUSS, G.F. (1956). On the nomenclature of some Delesseriaceae. Taxon 5, 158–162.
The Marine Benthic Flora of Southern Australia Part IIID complete list of references.
Publication:
Womersley, H.B.S. (24 February, 2003)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIID. Ceramiales – Delesseriaceae, Sarcomeniaceae, Rhodomelaceae
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIID 2003, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.
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