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Electronic Flora of South Australia Species Fact Sheet

Stylonema alsidii (Zanardini) Drew 1956a: 72.

Phylum Rhodophyta – Class Bangiophyceae – Order Porphyridiales – Family Porphyridiaceae

Selected citations: Kajimura 1992b: 418.


Goniotrichum alsidii (Zanardini) Howe 1914: 75. Chapman 1969: 4, fig. 1. Cribb 1983: 9, p1. 1 figs 1–3. Dangeard 1968: 5, p1. 6 figs 1–4. Garbary et al. 1980b: 144, fig. la, b. Kornmann & Sahling 1977: 256, fig. 147. Tanaka 1952: 5, figs 2, 3. G. elegans (Chauvin) Le Jolis. Dawson 1953: 3. Hamel 1924: 448, fig. 7A. Levring 1953: 461. Newton 1931: 246, fig. 150. Rosenvinge 1909: 75, figs 15, 16.

Thallus (Fig. 1D) red to red-purple, 1–5 mm high, frequently branched alternately to subdichotomously with the new lateral displacing the axis above it, attached by an unspecialised basal cell; epiphytic. Filaments (Fig. 1D, E) 15–20 µm in diameter, with a uniseriate row of closely adjacent cells 8–12 µm in diameter within the thick mucilaginous sheath; cells (Fig. 1E) isodiametric (L/B 0.5–2) with rounded to angular corners, rhodoplasts stellate, with a central pyrenoid.

Reproduction: Reproduction by release of vegetative cells as monospores, by dissolution of the sheath matrix (Kornmann & Sahling 1977, fig. 147D, E).

Type from the Adriatic Sea; in Museo Civico di Storia Naturale, Venice (?)

Selected specimens: Port Noarlunga, S. Aust., on Caulerpa scalpelliformis on upper sublittoral near-shore rocks (Womersley, 4.iv.1988; AD, A58642). Dead Mans I., Port Arthur, Tas., on Callophyllis 9–14 m deep (McCauley, 2.iii.1990; AD, A60488).

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

Distribution: Virtually cosmopolitan.

Recorded by Levring (1953, p. 461) from Cottesloe, the Swan R. and Safety Bay, W. Aust.; Pennington Bay and Pelican Lagoon, American R. inlet, Kangaroo I., S. Aust.; the Nobbies, Phillip I., Vic.; and from SE Tas., as well as from N.S.W. (Millar & Kraft 1993, p. 3) and Queensland.


CHAPMAN, V.J. (1969). The marine algae of New Zealand. Part III: Rhodophyceae. Issue 1: Bangiophycidae and Florideophycidae (Némalionales, Bonnemaisoniales, Gélidiales). (Cramer: Germany.)

CRIBB, A.B. (1983). Marine algae of the southern Great Barrier Reef. Part I. Rhodophyta. (Aust. Coral Reef Soc., Handbook 2: Brisbane.)

DANGEARD, P. (1968). Recherches sur quelques Bangiophycées (Protofloridées). Botaniste 51, 5–57.

DAWSON, E.Y. (1953). Marine red algae of Pacific Mexico. Part I. Bangiales to Corallinaceae subf. Corallinoideae. Allan Hancock Pacif. Exped. 17, 1–239.

DREW, K.M. (1956a). Conferva ceramicola Lyngbye. Bot. Tidsskr. 53, 67–74.

GARBARY, D.J., HANSEN, G.I. & SCAGEL, R.F. (1980b). The marine algae of British Columbia and northern Washington: Division Rhodophyta (red algae), Class Bangiophyceae. Syesis 13, 137–195.

HAMEL, G. (1924). Floridées de France. Bangiales. Rev. Algol. 1, 278–292, 427–457.

HOWE, M.A. (1914). The marine algae of Peru. Mem. Torrey Bot. Club 15, 1–185, Plates 1–66.

KAJIMURA, M. (1992b). A new deep-water species of Stylonema (Stylonemataceae, Rhodophyta) from the Sea of Japan. Bot. Mar. 35, 415–418.

KORNMANN, P. & SAHLING, P.-H. (1977). Meeresalgen von Helgoland. Benthische Griin-, Braun- and Rotalgen. Helgol. wiss. Meeresunters. 29, 1–292.

LEVRING, T. (1953). The marine algae of Australia. I. Rhodophyta: Goniotrichales, Bangiales and Némalionales. Arkiv för Bot. Ser. 2, 2, 457–530.

MILLAR, A.J.K. & KRAFT, G.T. (1993). Catalogue of Marine and Freshwater Red Algae (Rhodophyta) of New South Wales, including Lord Howe Island, South-western Pacific. Aust. Syst. Bot. 6, 1–90.

NEWTON, L. (1931). A Handbook of the British Seaweeds. [British Museum (N.H.): London.]

ROSENVINGE, L.K. (1909). The marine algae of Denmark. Part 1. Introduction. Rhodophyceae. 1. (Bangiales and Némalionales). K. danske Vidensk. Selsk. Biol. Skr., 7 Raekke, Afd. 7, 1–151, Plates 1, 2,2 maps.

TANAKA, T. (1952). The systematic study of the Japanese Protoflorideae. Mem. Fac. Fish. Kagoshima Univ. 2, 1–92, Plates 1–23.

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

Author: H.B.S. Womersley

Publication: Womersley, H.B.S. (14 January, 1994)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIA, Bangiophyceae and Florideophyceae (to Gigartinales)
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIIA 1994, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.

Illustration in Womersley Part IIIA, 1994: FIG. 1D, E.

Figure 1 image

Figure 1   enlarge

Fig. 1. A, B. Porphyridium purpureum (AD, A59695). A. Cells in patches on Dictyota fenestrata. B. Cells each with a rhodoplast and central pyrenoid. C. Chroodactylon ornatum (AD, A19851). Thallus showing branching pattern and cell detail. D, E. Stylonema alsidii (AD, A58642). D. Branching pattern. E. Cells each with a stellate rhodoplast and pyrenoid. F, G. Stylonema cornu-cervi (AD,A58644). F. Thallus (on Caulerpa) showing cell arrangement. G. Cells each with a rhodoplast and pyrenoid. H. Erythrocladia irregularis (on AD, A31991 of Chaetomorpha linum). Thallus showing branching pattern of cells and cell detail. I. Erythrocladia subintegra (AD, A58641). Thallus showing branching pattern of cells and detail in a few.

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