Electronic Flora of South Australia Species Fact Sheet

Entocladia viridis Reinke.

Phylum Chlorophyta – Order Chaetophorales – Family Chaetophoraceae

Selected citations: Abbott & Hollenberg 1976: 64, fig. 18. Levring 1946: 216. O'Kelly & Yarish 1981: 32, figs 1–12. South 1974: 913, fig. 7. Womersley 1956: 350.

Thallus (Fig. 41F) largely within the wall of various algal hosts, consisting of radiating filaments from a central (older) part which may become pseudoparenchymatous; filaments irregularly branched, mostly separate from each other, individual filaments often extending along the cell walls of elongate hosts (e.g. Cladophora). Cells irregular in shape, (4–) 6–7.5 (–9) µm in diameter, L/B 1–2 in the older part to L/B (1–) 2–3 (–4) in younger extending filaments which often have long and short cells intermixed; chloroplast lobed, with one (–2) pyrenoids.

Reproduction: Reproduction (O'Kelly & Yarish 1981) by biflagellate anisogametes and quadriflagellate zoospores.

Type from Naples, Italy (on Derbesia [ = Pedobesia] lamourouxii); in KIEL (not located by O'Kelly & Yarish (1981, p. 33)).

Selected specimens: Rosetta Bay, Victor Harbor, S. Aust., on Enteromorpha linza, I m deep 20.vi.1982; ADU, A53313). Nora Creina, S. Aust., on Cladophora rhizoclonioidea in shaded pool (Womersley, 31.xii.1981; ADU, A52871).

Distribution map based
on current data relating to
specimens held in the
State Herbarium of SA

Distribution: Probably cosmopolitan.

From Nora Creina and Rosetta Bay, Victor Harbor, S. Aust. "Sydney" and "Melbourne" (Levring 1946, p. 216), and observed on a variety of algae.

Taxonomic notes: E. viridis is probably a fairly common endophyte in the cell walls of large algae, but very few collections have been designated as such. The Nora Creina specimen agrees well with descriptions of the species from elsewhere.


ABBOTT, I.A. & HOLLENBERG, G.J. (1976). Marine Algae of California. (Stanford Univ. Press: Stanford.)

LEVRING, T. (1946). A list of marine algae from Australia and Tasmania. Acta Horti gothoburg 16, 215–227.

O'KELLY, C.J. & YARISH, C. (1981). Observations on marine Chaetophoraceae (Chlorophyta) II. On the circumscription of the genus Entocladia Reinke. Phycologia 20, 32–45.

SOUTH, G.R. (1974). Contributions to the flora of marine algae of eastern Canada, II. Family Chaetophoraceae. Naturaliste can, 101, 905–923.

WOMERSLEY, H.B.S. (1956). A critical survey of the marine algae of southern Australia. I. Chlorophyta. Aust. J. mar. freshw. Res. 7, 343–383.

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
©Board of the Botanic Gardens and State Herbarium, Government of South Australia

Illustration in Womersley Part I, 1984: FIG. 41F.

Figure 41 image

Figure 41   enlarge

Fig. 41. A–C. Ulothrix subflaccida. A. Upper part of filament (ADU, A 15399). B. Base of filament with elongate rhizoidal cell (ADU, A15399). C. Reproductive cells with zooids (ADU, A53176). D,E. Uronema marina. D. Filament with upper cell containing zooids (ADU, A51119). Dl. Terminal cell of young filament (ADU, A31827). E. Filament (ADU, A31827). F. Entocladia viridis. Thallus epiphytic on Cladophora rhizoclonioidea (ADU, A52871). G,H. Pilinia novae-zelandiae. G. Thallus on Sargassum, with terminal sporangia on short erect filaments (ADU, A32003). H. Part of a long erect filament with lateral sporangia (ADU, A50870).

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