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Electronic Flora of South Australia Species Fact Sheet
Phylum Rhodophyta – Family Rhodomelaceae – Tribe Chondrieae
Selected citations: Adams 1994: 332, pl. 114 mid left. J. Agardh 1863: 805. De Toni 1903: 837. Gordon-Mills & Womersley 1987: 544, figs 23F, 24A, B, 25. Huisman 1997: 203. Huisman & Walker 1990: 432. Lucas 1909: 40. Lucas & Perrin 1947: 259, fig. 117. Millar & Wynne 1992c: 428. Silva et al. 1996: 483.
Synonym
Chondriopsis lanceolata (Harvey) J. Agardh 1892: 157. Sonder 1880: 34.
Thallus (Fig. 198A) dark red-brown, 2–6 cm high, much branched irregularly radially for 3–4 orders, sometimes slightly distichous, branches terete near apices, compressed in mid and lower branches; lower branches 500–800 µm broad where compressed, grading to lesser branchlets 300–350 µm in diameter, young branchlets basally constricted but this soon lost. Holdfasts discoid, 0.2–0.8 mm across, or with short lateral branches attached by discoid haptera (Fig. 198B); epiphytic on Posidonia or epilithic. Structure. Apices (Fig. 198D, G) tapering gradually to an apical filament 8–10 cells long, apical cell dome-shaped, 8–10 µm in diameter, with 5 pericentral cells (Fig. 198C) not readily distinguished from inner cortical cells, cortex 2–3 cells broad, transversely and 5–7 cells laterally, epidermal cells 10–15 (–18) µm in diameter and L/D 1–3.5 (–6). Cell wall thickenings (Fig. 198C) lenticular to band-like, mainly on the outer and radial walls of the pericentral and inner cortical cells. Cells with discoid rhodoplasts.
Reproduction: Gametophytes dioecious. Procarps several cells up on trichoblasts. Carposporophytes with a basal fusion cell and branched gonimoblast with clavate terminal carposporangia 35–65 µm in diameter. Cystocarps (Fig. 198D, E) ovoid, 700–1200 µm in diameter, with a short stalk and often a rounded basal protrusion; pericarp ostiolate, with 16–18 erect filaments, ecorticate or lightly corticate below. Spermatangial plates (one seen) discoid (Fig. 198F), 250–300 µm across, with a sterile margin one cell broad.
Tetrasporangia (Fig. 198G) in lesser branchlets, on 1–2 pericentral cells per axial cell, 60–140 µm in diameter.
Type from Rottnest I., W. Aust. (Harvey, Trav. Set 191); holotype in Herb. Harvey, TCD; probable isotypes in Alg. Aust. Exsicc. 156A.
Selected specimens: Point Peron, W. Aust., on Posidonia australis, uppermost sublittoral (Womersley, 18.viii.1979; AD, A51015 "Marine Algae of southern Australia" No. 212, and 29.ix.1979; AD, A51027). Scott Bay, S. Aust., upper sublittoral pools (Womersley, 27.i.1951; AD, A15022).
Distribution: Houtman Abrolhos to Point Peron W. Aust., (Huisman 1997: 203) and probably from Scott Bay, S. Australia.
Taxonomic notes: The Scott Bay collection is of small, depauperate plants and is only provisionally referred to C. lanceolata. Typical C. lanceolata is characterised by habit and the compressed larger branches, together with the attenuate apices.
References:
ADAMS, N.M. (1994). Seaweeds of New Zealand. (Cant. Univ. Press: Christchurch.)
AGARDH, J.G. (1863). Species Genera et Ordines Algarum. Vol. 2, Part 3, pp. 787–1291. (Gleerup: Lund.)
AGARDH, J.G. (1892). Analecta Algologica. Acta Univ. lund. 28, 1–182, Plates 1–3.
DE TONI, G.B. (1903). Sylloge Algarum omnium hucusque Cognitarum. Vol. 4. Florideae. Sect. 3. pp. 775–1521 + 1523–1525. (Padua.)
GORDON-MILLS, E.M. & WOMERSLEY, H.B.S. (1987). The genus Chondria C. Agardh (Rhodomelaceae, Rhodophyta) in southern Australia. Aust. J. Bot. 35, 477–565.
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.)
LUCAS, A.H.S. & PERRIN, F. (1947). The Seaweeds of South Australia. Part 2. The Red Seaweeds. (Govt Printer: Adelaide.)
LUCAS, A.H.S. (1909). Revised list of the Fucoideae and Florideae of Australia. Proc. Linn. Soc. N.S.W. 34, 9–60.
MILLAR, A.J.K. & WYNNE, M.J. (1992c). Chondria viticulosa sp. nov. (Rhodomelaceae, Rhodophyta), a distinctly flattened species from south-eastern Queensland, Australia. Aust. Syst. Bot. 5, 421–429.
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.W. (1880). In Mueller, F., Fragmenta Phytographiae Australiae. Supplementum ad volumen undecinum: Algae Australianae hactenus cognitae, pp. 1–42, 105–107. (Melbourne.)
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.
Illustration in Womersley Part IIIA, 2003: FIG. 198.
Figure 198 enlarge
Fig. 198. Chondria lanceolata (A–D, AD, A51015). A. Habit, on Posidonia. B. Branch with short, discoid, holdfasts. C. Transverse section of branch. D. Branches with cystocarps. E. Cystocarps with carposporangia. F. Spermatangial plate. G. Branches with tetrasporangia.
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