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Electronic Flora of South Australia Genus Fact Sheet

Genus CENTROCERAS Kützing 1841: 731

Phylum Rhodophyta – Order Ceramiales – Family Ceramiaceae – Tribe Ceramieae

Thallus erect, tufted, of erect dichotomous and laterally branched filaments from a limited prostrate base, attached by rhizoids. Branches terete, with a ring of periaxial cells on the upper end of axial cells, each producing short acropetal cells and basipetally usually 2 regular rows of small corticating rectangular cells which extend as the axial cells elongate, thus completely covering the axial cells.

Reproduction: Gametophytes dioecious. Carpogonial branches borne on periaxial cells near branch apices, 4-celled. Carposporophytes with few rounded gonimolobes, surrounded by short involucral branches from below. Spermatangia terminal on branched filaments from periaxial cells, forming dense nodal sori.

Tetrasporangia produced from periaxial cells, becoming whorled at the nodes, with or without short involucral filaments, tetrahedrally divided.

Lectotype species: C. clavulatum (C. Agardh) Montagne 1846: 140.

Taxonomic notes: A genus of about 9 species (Gallagher & Humm 1983, p. 266), well marked by the complete axial cortication by closely adjacent longitudinal rows of short cells.


GALLAGHER, S.B. & HUMM, H.J. (1983). Centroceras internitens nov. sp. (Rhodophyceae, Ceramiaceae) from the western tropical North Atlantic Ocean. J. phycol. 19(3), 261–268.

KÜTZING, F.T. (1841). Ueber Ceramium Ag. Linnaea 15, 727–746.

MONTAGNE, C. (1846). Algues. In Durieu de Maisonneuve, M.C., Exploration scientifique de l'Algérie. Bot. I., pp. 121–160. (Imprimerie Imperiale: Paris.)

The Marine Benthic Flora of Southern Australia Part IIIC complete list of references.

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (24 December, 1998)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIC. Ceramiales – Ceramiaceae, Dasyaceae
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