Electronic Flora of South Australia
Electronic Flora of South Australia
Census of SA Plants, Algae & Fungi
Identification tools

Electronic Flora of South Australia Species Fact Sheet

Sarcotrichia dolichocystidea (J. Agardh) Womersley & Shepley 1959: 210.

Phylum Rhodophyta – Family Sarcomeniaceae

Selected citations: May 1965: 377. Womersley 1966: 153.


Sarcomenia dolichocystidea J. Agardh 1896: 135; 1899: 145. De Toni 1900: 740. Lucas 1909: 37. Womersley & Shepley 1959: 192, figs 72–82, pl. 4 fig. 2.

Thallus (Fig. 72F) medium red to red-brown, when detached rapidly disintegrating, mucilaginous, 2–20 cm high, slender, much branched irregularly to unilaterally, with older terete axes and branched upper parts bearing 2 rows of monosiphonous filaments, lost from lower parts. Holdfast rhizoidal, spreading, discoid; epiphytic. Structure. Apical development as in S. tenera but with only the lateral flanking cells producing monosiphonous filaments (Figs 71 I, 72G), at first alternately from each upper flanking cell, later from both sides of each segment; filaments 14–20 µm in diameter, cells L/D 3–6. Lateral branches endogenous. Cortication commences many segments below the apices, becoming heavier on the terete lower axes. Cells uni- or binucleate in filaments, multinucleate in larger cells; rhodoplasts discoid, becoming chained.

Reproduction: Gametophytes dioecious. Procarps (Fig 71J) produced as in S. tenera, with the adaxial pericentral cell producing 2 sterile cells and the 4-celled carpogonial branch, the carposporophyte and cystocarp identical with those of S. tenera. Spermatangial blades also similar in structure to S. tenera.

Tetrasporangial stichidia (Fig. 71K) slightly longer and more corticated than in S. tenera, otherwise identical in structure; tetrasporangia 65–90 µm in diameter.

Type from Brighton Beach, Port Phillip, Vic. (Harvey, Alg. Aust. Exsicc. 209F); holotype in Herb. Agardh, LD, 43444.

Selected specimens: Arno Bay, S. Aust., on Sargassum, drift (Kraft 4210, 12.xi.1971; AD, A42249). Port Turton, S. Aust., 8–10 m deep (Kald, 5.ix.1970; AD, A37253). American R. inlet, Kangaroo I., S. Aust., drift (Womersley, 25.viii.1963; AD, A26728) and (Shepley, 18.viii.1954; AD, A19788-"Marine Algae of southern Australia" No. 121), and near Muston, 2–3 m deep (Womersley, 22.viii.1963; AD, A26998). Port Arlington, Port Phillip, Vic., on Zostera? and jetty piles, 0–2 m deep (Womersley, 9.viii.1959; AD, A23109). Crawfish Rock, Westernport Bay, Vic., 2 m deep (Watson, 28.v.1974; AD, A45383). Dover, Tas., drift (Wollaston, 20.viii.1965; AD, A29558).

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

Distribution: King George Sound, W. Aust., to Westernport Bay, Vic., and N Tasmania.

Taxonomic notes: S. dolichocystidea usually occurs in more sheltered situations than S. tenera and is generally more slender. They differ essentially in the formation of 2 rows of monosiphonous filaments in the former and 4 in the latter. This might possibly be an environmental effect but distinct intermediates have not been observed.


AGARDH, J.G. (1896). Analecta Algologica. Cont. III. Acta Univ. lund. 32, 1–140, Plate 1.

AGARDH, J.G. (1899). Analecta Algologica. Cont. V. Acta Univ. lund. 35, 1–160, Plates 1–3.

DE TONI, G.B. (1900). Sylloge Algarum omnium hucusque Cognitarum. Vol. 4. Florideae. Sect. 2. pp. 387–776. (Padua.)

LUCAS, A.H.S. (1909). Revised list of the Fucoideae and Florideae of Australia. Proc. Linn. Soc. N.S.W. 34, 9–60.

MAY, V. (1965). A census and key to the species of Rhodophyceae (red algae) recorded from Australia. Contr. N.S. W. Natl Herb. 3, 349–429.

WOMERSLEY, H.B.S. & SHEPLEY, E.A. (1959). Studies on the Sarcomenia group of the Rhodophyta. Aust. J. Bot. 7, 168–223.

WOMERSLEY, H.B.S. (1966). Port Phillip survey, 1957–1963: Algae. Mem. natl. Mus., Vict. No. 27, 133–156.

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

Publication: Womersley, H.B.S. (24 February, 2003)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIID. Ceramiales – Delesseriaceae, Sarcomeniaceae, Rhodomelaceae
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIID 2003, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.

Illustrations in Womersley Part IIIA, 2003: FIGS 71 I–K, 72F, G.

Figure 71 image

Figure 71   enlarge

Fig. 71. A–D. Malaconema roeanum (A, B, D, AD, A19787; C, AD, A1459). A. Side view of compressed branch apex. B. Face view of a branch apex. C. Face view of a stichidium. D. Transverse section of a compressed branch, with slight cortication. E–H. Sarcotrichia tenera (AD, A16097). E. Branch apex with developing lateral and transverse monosiphonous filaments. F. Procarp with division of supporting cell to an auxiliary cell. C. A spermatangial blade. H. Apex of a stichidium, adaxial view. I–K. Sarcotrichia dolichocystidea (AD, A19788). 1. Branch apex, with monosiphonous filaments only from the flanking cells. J. Branch with a mature procarp. K. A stichidium. L, M. Platysiphonia delicata (AD, Al2914). L. Branch apex showing segmentation. M. Branch with a mature procarp. (All as in Womersley & Shepley 1959, courtesy of Aust. J. Bot.).

Figure 72 image

Figure 72   enlarge

Fig. 72. A–E. Sarcotrichia tenera (A, AD, A62987; B, C, AD, A57774; D, E, AD, A26781). A. Habit. B. Corticate branch with ecorticate laterals. C. Young branch with monosiphonous filaments from flanking cells and transverse pericentral cell. D. Cystocarps. E. Branch with stichidia. F, G. Sarcotrichia dolichocystidea (AD, 26728). F. Habit. G. Branch with monosiphonous filaments only from flanking cells.

Disclaimer Copyright Disclaimer Copyright Email Contact:
State Herbarium of South Australia
Government of South Australia Government of South Australia Government of South Australia Department for Environment and Water