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Electronic Flora of South Australia Genus Fact Sheet
Phylum Rhodophyta – Order Ceramiales – Family Ceramiaceae – Tribe Heterothamnieae
Thallus erect from a prostrate base, 2–10 mm high, axes irregularly radially branched, axial cells bearing 3 (rarely 2 or 4) similar whorl-branchlets more or less horizontally and subdichotomously branched, 4–7 cells long, terminal cells with rounded ends; gland cells sessile, ovoid, touching only the bearing cell. Lateral branches arising from the basal cell of whorl-branchlets. Cells uninucleate.
Reproduction: Gametophytes dioecious. Carpogonial branches borne on the basal (=supporting) cell of whorl-branchlets, usually only one per branch apex which continues development after initiation of a procarp. Carposporophytes with rounded gonimolobes, protected by enlarged whorl-branchlets and branches from lower axial cells. Spermatangial clusters on cells of whorl-branchlets, branched, with terminal spermatangia.
Tetrasporangia sessile on cells of whorl-branchlets, decussately or cruciately divided.
Type species . S. patens Wollaston 1981: 110, figs 1–11.
Taxonomic notes: Scageliopsis is characterised by whorls of 3 whorl-branchlets which become subdichotomously branched, by fusion of cells below the carposporophyte, by continued development of both axes and whorl-branchlets after procarp formation, and by ovoid gland cells touching only the bearing cell.
S. patens is the only species in the genus.
References:
WOLLASTON, E.M. (1981). Descriptions of two new genera, Scageliopsis and Glandothamnus (Ceramiaceae, Rhodophyta), including five previously undescribed species from southern Australia. Pacific Sci. 34, 109–127.
The Marine Benthic Flora of Southern Australia Part IIIC complete list of references.
Publication:
Womersley, H.B.S. (24 December, 1998)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIC. Ceramiales – Ceramiaceae, Dasyaceae
©State Herbarium of South Australia, Government of South Australia
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