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

Kuetzingia canaliculata (Greville) Sonder 1845: 54; 1848: 184.

Phylum Rhodophyta – Family Rhodomelaceae – Tribe Amansieae

Selected citations: J. Agardh 1863: 1097. De Toni 1903: 1078. De Toni & Forti 1923: 46. Falkenberg 1901: 451, pl. 7 figs 30–36. Harvey 1847: 23, pl. 9; 1855a: 538; 1862a: pl. 232; 1863, synop.: xvi. Huisman 1997: 205; 2000: 169. Huisman & Walker 1990: 435. Kützing 1849: 846; 1865: 4, pl. 10. Kylin 1956: 542. Lucas 1909: 45. May 1965: 396. Schmitz & Falkenberg 1897: 470. Silva et al. 1996: 503. Sonder 1848: 184; 1880: 32. Wilson & Kraft 2000: 344, figs 12, 13.


Rytiphlaea canaliculata Greville 1831: 149, pl. iv, figs 1–4 (upper).

Thallus (Fig. 163A) dark red-brown, 10–50 cm high, complanately branched with fairly regular (unless broken) opposite branches for 2–3 orders, branches 2–15 mm apart, axils broad, ultimate branches (1–) 2–6 cm long, branches flat, linear, (2–) 3–5 (–6) mm broad, corticated, midrib present, apices rounded with a slight notch, apex and often margins inrolled. Axes thickened and denuded below, 2–4 mm broad. Holdfast discoid-conical, 4–10 mm across; epilithic. Structure. Apex inrolled, with a dome-shaped apical cell. Pericentral cells (Fig. 163B) 6, 2 large lateral cells, 2 smaller dorsal and 2 (smallest) ventral cells, often with 1–4 interposed pseudopericentral cells. Wings with a single central layer of large cells and a small-celled cortex 2–3 cells broad, with a secondary cortex over the midrib. Opposite, endogenous, lateral filaments (Fig. 163D) arise every (2–) 4–10 axial cells. Trichoblasts occur at the ends of the endogenous lateral filaments. Cells uni- or multinucleate; rhodoplasts discoid, chained in larger cells.

Reproduction: Gametophytes dioecious. Procarps occur on terete marginal and surface laterals. Carposporophytes and cystocarps little known. Spermatangial heads (fig. 163C) subspherical, 100–150 µm in diameter, borne on large basal cells of unbranched trichoblasts in dorsal series on laterals.

Tetrasporangial stichidia (Fig. 163D–G) occur in clusters at the ends of the endogenous filaments, submarginally or from the surface on both surfaces, linear, compressed, 0.5–2 mm long and 200–400 µm broad, with 2 rows of paired tetrasporangia (Fig. 163F, G) 150–200 µm in diameter.

Type from "coast of Swan R. settlement", W. Aust. (Fraser); holotype in E.

Selected specimens: 7 mile beach, N of Dongara, W. Aust., drift (Womersley, 17.ix.1979; AD, A51367). Port Denison, W. Aust., 8–12 m deep (Kraft & Allender, 9.viii.1979; MELU, K6946). Cowaramup Bay, W. Aust., drift (Royce 655, 5.vi.1950; AD, A15491). Gnarabup Beach, W. Aust., in reef pools (Womersley, 1.ix.1979; AD, A50687). Flinders Bay (Augusta), W. Aust., drift (Womersley, 1.ix.1979; AD, A50638). Point D'Entrecasteaux, W. Aust., drift (Smith, 30.iii.1946; AD, A4551). Wanna, S. Aust., drift (Womersley, 19.ii.1959; AD, A22413).

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

Distribution: Dongara to Point D'Entrecasteaux, W. Aust., and Wanna, S. Australia.

Taxonomic notes: Kuetzingia canaliculata extends from the north along the south-west coast of Western Australia within the southern Australian region, and one specimen is known from Wanna in South Australia. The species is not adequately known, especially as cystocarpic plants.


AGARDH, J.G. (1863). Species Genera et Ordines Algarum. Vol. 2, Part 3, pp. 787–1291. (Gleerup: Lund.)

DE TONI, G.B. & FORTI, A. (1923). Alghe di Australia, Tasmania e Nouva Zelanda. Mem. R. Inst. Veneto Sci., Lett. Arti 29, 1–183, Plates 1–10.

DE TONI, G.B. (1903). Sylloge Algarum omnium hucusque Cognitarum. Vol. 4. Florideae. Sect. 3. pp. 775–1521 + 1523–1525. (Padua.)

FALKENBERG, P. (1901). Die Rhodomelaceen des Golfes von Neapel und der angrenzenden Meeres-abschnitte. Fauna und Flora des Golfes von Neapel. Monogr. 26. (Friedländer: Berlin.)

GREVILLE, R.K. (1831). Description of two new species of Marine Algae. Edinburgh J. Nat. & Geogr. Sci. N.S. 3, 148–150, Plate iv.

HARVEY, W.H. (1847). Nereis Australis, pp. 1–69, Plates 1–25. (Reeve: London.)

HARVEY, W.H. (1855a). Some account of the marine botany of the colony of Western Australia. Trans. R. Jr. Acad. 22, 525–566.

HARVEY, W.H. (1862a). Phycologia Australica. Vol. 4, Plates 181–240. (Reeve: London.)

HARVEY, W.H. (1863). Phycologia Australica. Vol. 5, Plates 241–300, synop., pp. i-lxxiii. (Reeve: London.)

HUISMAN, J.M. & WALKER, D.I. (1990). A catalogue of the marine plants of Rottnest Island, Western Australia, with notes on their distribution and biogeography. Kingia 1, 349–459.

HUISMAN, J.M. (1997). Marine Benthic Algae of the Houtman Abrolhos Islands, Western Australia. In Wells, F.E. (Ed.) The Marine Flora and Fauna of the Houtman Abrolhos Islands, Western Australia, pp. 177–237. (W. Aust. Museum: Perth.)

HUISMAN, J.M. (2000). Marine Plants of Australia. (Univ. W. Aust. Press, Nedlands, W. Aust. & ABRS, Canberra, A.C.T.)

KÜTZING, F.T. (1849). Species Algarum. (Leipzig.)

KÜTZING, F.T. (1865). Tabulae Phycologicae. Vol. 15. (Nordhausen.)

KYLIN, H. (1956). Die Gattungen der Rhodophyceen. (Gleerups: Lund.)

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.

SCHMITZ, F. & FALKENBERG, P. (1897). Rhodomelaceae. In Engler, A. & Prantl, K., Die natürlichen Pflanzenfamilien. T.1. Abt. 2, pp. 421–480. (Englemann: Leipzig.)

SILVA, P.C., BASSON, P.W. & MOE, R.L. (1996). Catalogue of the Benthic Marine Algae of the Indian Ocean. (Univ. California Press: Berkeley.)

SONDER, O.G. (1845). Nova Algarum genera et species, quas in itinere ad oras occidentales Novae Hollandiae, collegit L. Preiss, Ph.Dr. Bot. Zeit. 3, 49–57.

SONDER, O.W. (1848). Algae. In Lehmann, C., Plantae Preissianae. Vol. 2, pp. 161–195. (Hamburg.)

SONDER, O.W. (1880). In Mueller, F., Fragmenta Phytographiae Australiae. Supplementum ad volumen undecinum: Algae Australianae hactenus cognitae, pp. 1–42, 105–107. (Melbourne.)

WILSON, S.M. & KRAFT, G.T. (2000). Morphological and taxonomic studies of selected genera from the Tribe Amansieae (Rhodomelaceae, Rhodophyta). Aust. Syst. Bot. 13, 325–372.

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

Author: H.B.S. Womersley, S.M. Wilson & G.T. Kraft

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.

Illustration in Womersley Part IIIA, 2003: FIG. 163.

Figure 163 image

Figure 163   enlarge

Fig. 163. Kuetzingia canaliculata (A, AD, A50638; B, G, AD, A50687; C–F, MELU, K6946 by G.T. Kraft). A. Habit. B. Transverse section of branch with 6 pericentral cells, 2 large lateral, 2 dorsal and 2 ventral plus 1 pseudopericentral cells. C. Spermatangial organs. D. Stichidia on the ventral surface and a few on the dorsal surface (arrows) of a branch. E. Simple and branched stichidia submarginal on the ventral side of a branch. F. Stichidia with paired tetrasporangia. G. Longitudinal section of a stichidium. (C–F, as in Wilson & Kraft 2000, courtesy of Aust. Syst. Botany.)

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