Electronic Flora of South Australia Species Fact Sheet
Phylum Chlorophyta – Order Codiales – Family Codiaceae
Selected citations: Silva & Womersley 1956: 262, fig. 1.
Thallus (Fig. 75A) medium to dark green, smooth and firm, applanate and strongly adherent, rounded with marginal lobes, 2.5–6 (–10) mm thick, to 10 cm across. Utricles (Fig. 76A) in small to large clusters, (45–) 55–80 (–100) µm in diameter, 0.5–1 (–1.5) mm long, usually slightly constricted just below apices then slightly broader below, apices rounded to subtruncate with slightly thickened wall (4–7 µm thick), often more so peripherally; utricles from thallus margin often broader (to 125 µm in diameter) below their apices, which are thidcened (to 30 µm); hairs absent. Medullary filaments extending from the evenly tapering lower part of utricles, wall undulate, (15–) 20–35 µm in diameter, without plugs. Gametangia narrowly ellipsoid to cylindrical, 44–75 µm in diameter, 240–380 µm long.
Type from Guaitecas I., Chile; in Herb. Svedelius, UPS.
Selected specimens: Cape Forestier, Tas., lower eulittoral (Bennett, 21.vi.1954; ADU, A19830). Wineglass Bay, Freycinet Pen., Tas., low eulittoral (Edyvane, 26.iii.1982; ADU, A53000). Bicheno, Tas., upper sublittoral amongst Durvillaea (Womersley, 3.xi.1982; ADU, A54027).
Distribution: Chile, Chatham I., New Zealand (South I., Stewart I.).
In southern Australia, known only from south-east Tasmania. This is probably a sub-antarctic species which just reaches Tasmania. It occurs in the lowest eulittoral or uppermost sublittoral among the stipes of Durvillea, forming thin, rounded, tightly adherent patches on the rock.
SILVA, P.C. & WOMERSLEY, H.B.S. (1956). The genus Codium (Chlorophyta) in southern Australia. Aust. J. Bot. 4, 261–289.
SVEDELIUS, N. (1900). Algen aus den Landern der Magellansstrasse and West Patagonien. Svenska Exp. till Magellansländerna, 3(8), 283–316, Plates 16–18.
The Marine Benthic Flora of Southern Australia Part I complete list of references.
Womersley, H.B.S. (31 May, 1984)
The Marine Benthic Flora of Southern Australia
©Board of the Botanic Gardens and State Herbarium, Government of South Australia
Illustrations in Womersley Part I, 1984: FIGS 75A, 76A.
Figure 75 enlarge
Fig. 75. A. Codium dimorphum (ADU, A19830). B. Codium capitulalum (ADU, A19384). C. Codium lucasii (ADU, A45051). D. Codium perriniae (ADU, A37803). E. Codium spongiosum (ADU, A1581).
Figure 76 enlarge
Fig. 76. Utricle clusters with gametangia. A. Codium dimorphum (ADU, A19830). R. Codium capitulatum (ADU, A13623). C. Codium lucasii (ADU, A20401). D. Codium lucasii (Royce 1039 in PERTH, UC). E. Codium perriniae (ADU, Al2781). F. Codium spongiosum (ADU, A19383). (After Silva & Womersley 1956.)
State Herbarium of South Australia