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Myriogramme cartilaginea (Harvey) Womersley, comb. nov.

Phylum Rhodophyta – Family Delesseriaceae


Nitophyllum cartilagineum Harvey 1855a: 549; 1863, synop.: xxxii. J. Agardh 1872: 50; 1876: 459; 1898: 44. De Toni 1900: 634. Kylin 1924: 96. Lucas 1909: 35; 1926: 598, pl. 38 fig 2. May 1965: 402. Silva et al. 1996: 463. Sonder 1880: 23.

Scutarius cartilagineus (Harvey) Kuntze 1891: 920.

Thallus (Fig. 49C) erect, dark red-brown, 4–8 cm high, cartilaginous, more-or-less complanately branched with irregularly alternate branches at intervals of 5–10 mm, branches of relatively uniform width of 4–6 mm from base to just below apices, apices rounded, margins irregular to crispate or with short, blunt, appendages; midrib and veins absent. Holdfast discoid, rhizoidal; epiphytic? Structure. Growth marginal, with distinct apical cells; marginal cells small, mature surface cells irregular, angular, 30–50 µm across and L/D 1–1.5 (–2). Blades monostromatic when young, soon tristromatic and polystromatic centrally, cortical cells equivalent to primary cells, central (primary) layer not distinct. Rhodoplasts discoid.

Reproduction: Gametophytes unknown.

Tetrasporangial sori (Fig. 49D, E) scattered, round to ovate, 400–800 µm across and 160–200 µm thick, tetrasporangia in 2 layers (Fig. 49F), cut off from inner cortical cells, with 2 layers of smaller outer cortical cells; tetrasporangia subspherical, 45–75 µm in diameter.

Type from Garden I., W. Aust.; lectotype in Herb. Harvey, TCD (Trav. Set 131).

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

Distribution: Only known from Garden I., W. Aust., "Swan River., W. Aust." (Harvey, Alg. Aust. Exsicc. 294a-fragment in AD, A18533), and Elliston, S. Aust., on Osmundaria ?, 7 m deep (Shepherd, 22.v.1998; AD, A67903).

Taxonomic notes: M cartilaginea is a little known species, and placement in Myriogramme is uncertain in the absence of cystocarps. The Elliston specimens are tetrasporic and agree well with the type in thallus morphology and structure.


AGARDH, J.G. (1872). Bidrag till Florideernes Systematik. Acta Univ. Lund 8, 1–60.

AGARDH, J.G. (1876). Species Genera et Ordines Algarum. Vol. 3, Part 1 - Epicrisis systematis Floridearum, pp. i-vii, 1–724. (Weigel: Leipzig.)

AGARDH, J.G. (1898). Species Genera et Ordines Algarum. Vol. 3, Part 3 - De dispositione Delesseriearum. (Gleerup: Lund.)

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

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

KUNTZE, O. (1891). Revisio generum Plantarum. Part II. 4. Algae, pp. 877–930. (Leipzig.)

KYLIN, H. (1924). Studien über die Delesseriaceen. Lunds Univ. Årsskr. N.F. Avd. 2, 20(6), 1–111.

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

LUCAS, A.H.S. (1926). Notes on Australian marine algae. III. The Australian species of the genus Nitophyllum. Proc. Linn. Soc. N.S.W. 51, 594–607, Plates 37–45.

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.

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.

Author: H. B. S. Womersley

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. 49 C–F.

Figure 49 image

Figure 49   enlarge

Fig. 49. A, B. Myriogramme gunniana (AD, A45018). A. Tetrasporangial sori. B. Transverse section of tetrasporangial sorus. C–F. Myriogramme cartilaginea (C, isolectotype in TCD; D, E, AD, A18533; F, AD, A67903). C. Habit of isotype. D. Branch with tetrasporangial sorus. E. Tetrasporangial sori. F. Transverse section of tetrasporangial sorus.

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