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Electronic Flora of South Australia Species Fact Sheet

Dasya naccarioides Harvey 1844: 432; 1847: 63, pl. 22; 1859b: 302; 1863, synop.: xxiii.

Phylum Rhodophyta – Order Ceramiales – Family Dasyaceae

Selected citations: J. Agardh 1863: 1217; 1890a: 100. De Toni 1903: 1198. Kützing 1849: 797; 1864: 23, pl. 64. Lucas 1912: 158; 1929a: 23; 1929b: 52. Lucas & Perrin 1947: 313. Millar 1990: 432, fig. 59A–C. Parsons 1975: 578, figs 5,6,40A. Reinbold 1897: 57. Sonder 1881: 36. Wilson 1892: 165. Womersley 1950: 181; 1966: 152.


Dasya tasmanica Sonder 1853: 702; 1881: 36. J. Agardh 1863: 1227; 1890a: 100. De Toni 1903: 1199. Harvey 1859: 302; 1863, synop.: xxiii. Lucas 1912: 158; 1929a: 23.

Dasya decipiens Sonder 1855: 526; 1881: 36. Harvey 1863, synop.: xxiii.

Thallus (Fig. 212A) light to medium to dark red with the axes paler than the branch tips, mucilaginous, with one to a few pyramidal and much branched robust axes 10–30 (–50) cm high, terminal pseudolateral tufts prominent. Main axes simple or branched, heavily corticated, (1–) 2–3 mm in diameter, percurrent, branched at intervals of 0.4–1 cm, denuded below. Laterals 2–20 cm long, decreasing in length above, 1–2 mm in diameter, themselves similarly branched but slenderer, arising from the basal cell of the fourth order of branching of a young pseudolateral. Holdfast discoid, 5–20 mm across; usually epilithic. Structure. Apices sympodial, pericentral cells 5, becoming obscured (Figs 212B, 213B) in older laterals and axes by profuse rhizoidal development and enlargement of their cells. Pseudolaterals (Fig. 213A) one per segment, spirally arranged, 2–3 mm long, with (3–) 5–7 subdichotomies every 1 (–2) cells from the base, giving usually 40–50 ultimate simple branches 7–12 cells long, tapering from the basal cells (50–) 80–130 µm in diameter and L/D 0.7–1.5 to the ultimate cells 10–25 µm in diameter and L/D 15–30. Adventitious monosiphonous filaments absent. Rhodoplasts discoid to elongate.

Reproduction: Gametophytes dioecious. Procarps (Fig. 212C) 1–3 borne alternately on the lower segments of the pseudolaterals (which then become polysiphonous). Carposporophyte (Fig. 212C) with a basal fusion cell (Fig. 213D) and carposporangia in rows of 2–4, obovoid-clavate to subspherical. Cystocarps (Fig. 212C) sessile on lateral corticated axes, urceolate to ovoid, (700–) 950–1300 µm in diameter, 1150–1550 µm long, with a short neck; pericarp 4–5 cells thick, outer cortical cells irregular in age and position. Spermatangial branches (Figs 212D, 213E, F) on the lower branches of the pseudolaterals, cylindrical, 150–300 µm long and 50–65 µm in diameter with 10–20 fertile segments, on a 1–2 celled monosiphonous stalk and with 1–2 globular cells (rarely a short filament) at the apex.

Stichidia (Figs 212E, 213G–I) on lower branches of the pseudolaterals, cylindrical, on a 1–2-celled monosiphonous stalk, 150–600 µm long and 90–125 µm in diameter with 6–12 fertile segments each with 5 pericentral cells, all of which become fertile. Tetrasporangia 25–45 µm in diameter, each with 2 (–3) cover cells (Fig. 213H), subspherical to slightly higher than broad, covering about half the sporangium.

Type from Georgetown, Tas. (Gunn); lectotype Gunn 1287, in TCD; isolectotype in BM.

Selected specimens: (see also Parsons 1975, p. 579): Nanarup, 32 km E of Albany, W. Aust., upper sublittoral on granite (Parsons, 18.xi.1968; AD, A33369). Third Beach, Esperance, W. Aust., upper sublittoral pools (Parsons, 21.xi.1968; AD, A33352). Point Sinclair, S. Aust., drift (Womersley, 25.i.1951; AD, A13861). Elliston, S. Aust., SW of jetty, 6 m deep on limestone (Shepherd, 24.x.1969; AD, A34803). Pennington Bay, Kangaroo I., S. Aust., rock pool on main reef (Womersley, 1.xi.1947; AD, A6126). Nora Creina, S. Aust., low eulittoral (Womersley, 26.x.1996; AD, A67109-"Marine Algae of southern Australia" No. 114). Newfield Bay, 1.6 km E of Peterborough, Vic. (Womersley, 10.xii.1969; AD, A34810). Port Fairy, Vic., upper sublittoral pool (Womersley, 2411967, AD, A31725). Western Port, Vic. (Wilson, 6.ii.1894; MEL, 1005902). Flinders, Vic., upper sublittoral pools, outer coast (Womersley, 18.i.1967: AD, A31510, A31805). Walkerville, Vic., at low tide (Sinkora A2633, 22.xi.1979; AD, A61039). Guyton Point, Robbins I., N Tas., drift (Wollaston & Mitchell, 23.i i,1964: AD, A27724). Bombay Rock, Tamar Estuary, Tas., upper sublittoral (Womersley, 27.i.1949; AD, A10413). Safety Cove, Port Arthur, Tas., on fucoids, upper sublittoral (Parsons, 31.x.1982; AD, A53353-"Marine Algae of southern Australia" No. 114a). Kiama, N.S.W., (Harvey; MEL, 1005882).

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

Distribution: Albany, W. Aust. to Kiama, N.S.W., and around Tasmania.

Taxonomic notes: Dasya naccarioides was described and illustrated in detail by Parsons (1975). It is a common, just subtidal, species on Victorian and Tasmanian coasts, differing from its nearest relative, D. clavigera, in having pseudolaterals tapering from their base to their apices, in lacking adventitious lateral branches, and the stichidia with whorls of 5 tetrasporangia rather than 6 in D. clavigera . D. naccarioides is usually epilithic whereas D. clavigera is often epiphytic.


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

AGARDH, J.G. (1890a). Till algernes systematik. Acta Univ. lund. 26(3), 1–125, Plates 1–3.

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

HARVEY, W.H. (1844). Algae of Tasmania. Lond. J. Bot. 3, 428–454.

HARVEY, W.H. (1847). Nereis Australis, pp. 1–64, Plates 1–25. (Reeve: London.)

HARVEY, W.H. (1859b). Algae. In Hooker, J.D., The Botany of the Antarctic Voyage. III. Flora Tasmaniae. Vol. II, pp. 282–343, Plates 185–196. (Reeve: London.)

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

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

KÜTZING, F.T. (1864). Tabulae Phycologicae. Vol. 14. (Nordhausen.)

LUCAS, A.H.S. & PERRIN, F. (1947). The Seaweeds of South Australia. Part 2. The Red Seaweeds. (Govt Printer: Adelaide.)

LUCAS, A.H.S. (1912). Supplementary list of the marine algae of Australia. Proc. Linn. Soc. N.S.W. 37, 157–171.

LUCAS, A.H.S. (1929a). The marine algae of Tasmania. Pap. Proc. R. Soc. Tasm. 1928, 6–27.

LUCAS, A.H.S. (1929b). A census of the marine algae of South Australia. Trans. R. Soc. S. Aust. 53, 45–53.

MILLAR, A.J.K. (1990). Marine red algae of the Coffs Harbour region, northern New South Wales. Aust. Syst. Bot. 3, 293–593.

PARSONS, M.J. (1975). Morphology and taxonomy of the Dasyaceae and Lophothalieae (Rhodomelaceae) of the Rhodophyta. Aust. J. Bot. 23(4), 549–713.

REINBOLD, T. (1897). Die Algen der Lacepede und Guichen Bay und deren näherer Umgebung (Süd Australien), gesammelt von Dr. A. Engelhart-Kingston. Nuova Notarisia 8, 41–62.

SONDER, O.W. (1853). Plantae Muellerianae. Algae. Linnaea 25, 657–709.

SONDER, O.W. (1855). Algae annis 1852 et 1853 collectae. Linnaea 26, 506–528.

SONDER, O.W. (1881). In Mueller, F., Fragmenta Phytographiae Australiae. Supplementum ad volumen undecinum: Algae Australianae hactenus cognitae, pp. 1–42, 105–107. (Melbourne.)

WILSON, J.B. (1892). Catalogue of algae collected at or near Port Phillip Heads and Western Port. Proc. R. Soc. Vict. 4, 157–190.

WOMERSLEY, H.B.S. (1950). The marine algae of Kangaroo Island. III. List of Species 1. Trans. R. Soc. S. Aust. 73, 137–197.

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

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

Author: M.J. Parsons and H.B.S. Womersley

Publication: Womersley, H.B.S. (24 December, 1998)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIC. Ceramiales – Ceramiaceae, Dasyaceae
©State Herbarium of South Australia, Government of South Australia

Illustrations in Womersley Part IIIA, 1998: FIGS 212, 213.

Figure 212 image

Figure 212   enlarge

Fig. 212. Dasya naccarioides (AD, A53353). A. Habit. B. Transverse section of older branch. C. Cystocarp with carposporophyte. D. Spermatangial branches. E. Pseudolaterals with stichidia.

Figure 213 image

Figure 213   enlarge

Fig. 213. Dasya naccarioides (AD, A31510). A. Mature pseudolateral, filaments on right showing base only. B. Transverse section of an older branch. C. Sympodial axis with a procarp. D. Young fusion cell and early gonimoblast. E. Spermatangial branches. F. Transverse section of a spermatangial branch. G. Stichidia. H. Apex of a stichidium with developing tetrasporangia. I. Longitudinal section of a stichidium. (All as in Parsons 1975, courtesy of Aust. J. Bot.)

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