Electronic Flora of South Australia Genus Fact Sheet

Genus PEDOBESIA MacRaild & Womersiey 1974: 91

Phylum Chlorophyta – Order Derbesiales – Family Derbesiaceae

Adult thallus coenocytic, of numerous elongate-clavate branches arising from a branched, filamentous system, derived in turn from a prostrate attachment pad with calcified cell walls; chloroplasts lenticular, without a pyrenoid.

Reproduction: Sporangia subterminal, lateral, cut off by a single wall, producing numerous stephanokontic zoospores. Life history direct, sporophytic.

Type species: P. clavaeformis (J. Agardh) MacRaild & Womersley.

Taxonomic notes: A genus of three species, the type and P. lamourouxii (J. Agardh) Rietema (1975, p. 108) from the Mediterranean and Japan, and P. feldmannii Abelard (1982, p. 187) from the Galapagos Is.

Pedobesia differs from Derbesia in its direct, diplontic life history and the presence of the calcified, prostrate stage following germination of the zoospore.

References:

RIETEMA, H. (1975). Comparative investigations on the life-histories and reproduction of some species in the siphoneous green algal genera Bryopsis and Derbesia. (Univ. Groningen.)

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

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (31 May, 1984)
The Marine Benthic Flora of Southern Australia
Part I
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