Electronic Flora of South Australia Species Fact Sheet
Phylum Chlorophyta – Order Codiales – Family Codiaceae
Thallus (Fig. 79C) firm, dark green, erect, repeatedly dichotomous, to 50 cm high, branches terete, 4–8 (–10) mm in diameter below, tapering gradually to 2–3 mm in diameter near apices. Utricles (Fig. 80C) cylindrical to slightly clavate, (100–) 130–210)(–300) in diameter, 460–800 µm long; apices rounded to truncate, wall thin or slightly thickened (-15 µm, rarely to 35 µm then lamellate); hairs (or scars) common, borne shortly below apices. Medullary filaments 20–35 µm in diameter with the plug 65–200 µm distant from utricle base. Gametangia elongate-ovoid, 80–160 µm in diameter and 230–390 µm long, 1–3 per utricle, borne on a protuberance at or below middle of utricle.
Type from Robe, S. Aust. (Wollaston, 17.iii.1956); in ADU, A20409.
Selected specimens: Emu Beach, King Georges Sound, W. Aust., drift (Mitchell, 27.ix.1966; ADU, A30817). Investigator Str., S. Aust., 33 m deep (Watson Stn Y18A, 24.i.1971: ADU, A38221). Robe, S. Aust., upper sublittoral pool (Womersley, 11.xii.1969; ADU, A34857-"Marine Algae of southern Australia" No. 17). Walkerville, Vic., drift (Sinkora A2106, 28.ii.1975; ADU, A48550). Fluted Cape, Bruny I., Tas., 23 m deep (Shepherd, 12.ii.1972; ADU, A41907). Port Arthur, Tas. (Cribb 150.1, 20.vi.1951; UC 949773).
Distribution: From Geographe Bay, W. Aust. around southern Australia and Tasmania to Tuggerah Lakes, N.S.W.
Taxonomic notes: Cl. australicum is a sublittoral species known from low water level (usually shaded) to 33 metres deep, on rough-water to moderate coasts. It is most closely related to C. harveyi and C. muelleri but differs in the utricle dimensions and apical characteristics, and also from C. harveyi in the plug position.
SILVA, P.C. & WOMERSLEY, H.B.S. (1956). The genus Codium (Chlorophyta) in southern Australia. Aust. J. Bot. 4, 261–289.
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 79C, 80C.
Figure 79 enlarge
Fig. 79. A. Codium harveyi (ADU, A10557, type). B. Codium muelleri (ADU, A35176). C. Codium australicum (ADU, A38221). D. Codium fragile (ADU, A34854). E. Codium spinescens (ADU, A19240. type).
Figure 80 enlarge
Fig. 80. Utricle clusters with gametangia. A. Codium harveyi (Perrin in UC and Mackay in K (right)). B. Codium muelleri (ADU. A18661). C. Codium australicum (Cribb 150.1 in UC). D. Codium fragile s.sp. tasmanicum (Cribb 126.9 in UC). E. Codium fragile s.sp. novae-zelandiae (ADU, A31711). F. Codium spinescens (Royce 616 in PERTH). (After Silva & Womersley 1956.)
State Herbarium of South Australia