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Electronic Flora of South Australia Species Fact Sheet

Caloglossa ogasawaraensis Okamura 1897: 13, figs A-D; 1908: 183, pl. 37 figs 1–11.

Phylum Rhodophyta – Family Delesseriaceae

Selected citations: De Toni 1900: 730. King & Puttock 1994: 107, fig. 3C. Millar & Kraft 1993: 46. Oliveira 1977: 117. Silva et al. 1996: 452. Tanaka & Kamiya 1993: 113, figs 1–23. West 1991: 460, figs 4–9. Wynne 1998: 40.


Caloglossa bombayensis Børgesen 1933a: 127, figs 10–12. May 1965: 395.

Thallus (Fig. 5D) brown-red, forming loose entangled mats 5–10 mm thick, composed of slightly arching, flat, linear branches 100–200 (–300) µm broad, internodes 1–4 mm long between slightly constricted nodes; attached by uniseriate rhizoids from nodal pericentral cells; epiphytic on Avicennia pneumatophores or on mud below mangroves. Structure. Growth apical, with a dome-shaped apical cell cutting off axial cells and lateral and transverse pericentral cells, the lateral cells each producing 2 flanking cells (Fig. 5E), dividing once more in broader blades giving blades 5–7 (–9) cells broad (Fig. 5F) in the internodes; secondary pit-connections frequent. Blades monostromatic apart from the midrib, ecorticate, margins entire. Branching of blades exogenous near apices, with adventitious proliferous blades (Fig. 5E) arising from nodal pericentral cells.

Reproduction: Reproduction (from Tanaka & Kamiya 1993 – South Australian specimens sterile). Gametophytes dioecious. Carpogonial branches cut off from transverse pericentral (supporting) cells after formation of a sterile cell, with a second sterile cell produced later. Gonimoblast much branched, with a basal fusion cell and chains of ovoid carposporangia. Cystocarps central on branch internodes, sessile, ovoid, with a pericarp 2–4 cells thick. Spermatangial sori produced on both sides of the blades, between the sterile midrib and margin, with spermatangia cut off from initials on the primary cells.

Tetrasporangial sori 6–18 axial cells long, arising from second- and third-order cell rows, 1–4 cells broad on each side of the midrib including the lateral pericentral cells and submarginal cells; tetrasporangia subspherical, 35–50 µm in diameter.

Type from Ogasawara-jima, Bonin Is, Japan (Yatabe, March 1879); holotype in TI.

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

Distribution: SE Asia, W Africa, Brazil, Peru, western Pacific, W subtropical Atlantic, eastern Australia.

In southern Australia, known only from Barker Inlet, Port Adelaide, S. Aust., on Avicennia pneumatophores (Brock, 28.i.1982; AD, A52909, 15.vii.1999; AD, A68323 and 26.x.1999; AD, A68391) and Garden I., Port Adelaide, S. Aust., on mud under Avicennia (Parsons, 10.iii.1982; AD, A52982) and mid eulittoral on a hulk (Brock, 2.iv.1999; AD, A68077).

Taxonomic notes: The above specimens are sterile but agree well vegetatively with the species. They occurred in an area subject to warmer water from a power station outfall, and may be adventive in this locality.


BØRGESEN, F. (1933a). Some Indian Rhodophyceae especially from the shores of the Presidency of Bombay III. Kew Bull. 1933(3): 113–141, plates v-ix.

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

KING, R.J. & PUTTOCK, C.F. (1994). Morphology and taxonomy of Caloglossa (Delesseriaceae, Rhodophyta). Aust. Syst. Bot. 7, 89–124.

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.

MILLAR, A.J.K. & KRAFT, G.T. (1993). Catalogue of marine and freshwater Red Algae (Rhodophyta) of New South Wales, including Lord Howe Island, South-western Pacific. Aust. Syst. Bot. 6, 1–90.

OKAMURA, K. (1897). On the algae from Ogasawara-jima (Bonin Islands.) Bot. Mag., Tokyo 11, 1–16, pl. 1.

OKAMURA, K. (1908). 'cones ofJapanese Algae. Vol. 1, No. 8, pp. 179–208, Plates 36–40.

OLIVEIRA FILHO, E.C. de (1977). Algas Marinhas Bentônicas do Brasil. Univ. São Paulo, Instituto de Biociências. [Thesis.]

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

TANAKA, J. & KAMIYA, M. (1993). Reproductive structure of Caloglossa ogasawaraensis Okamura (Ceramiales, Rhodophyceae) in nature and culture. Jap. J. Phycol. 41, 113–121.

WEST, J.A. (1991). New records of marine algae from Peru. Bot. Mar. 34, 459–464.

WYNNE, M.J. (1998). A checklist of benthic marine algae of the tropical and subtropical western Atlantic: first revision. Nova Hedwigia Beih. 116, 1–155.

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. 5 D–F.

Figure 5 image

Figure 5   enlarge

Fig. 5. A–C. Caloglossa leprieurii (AD, A61508). A. Tetrasporangial sorus. B. Tetrasporangia cut off from second-order rows and some from transverse pericentral cells. C. Cover cells lying outside the tetrasporangia. D–F. Caloglossa ogasawaraensis (D, F, AD, A52909; E, AD, A52982). D. Thallus with prostrate axis bearing nodal rhizoids and erect branches. E. Branch with lateral pericentral and flanking cells and an adventitious lateral branch. F. An older branch 9 cells broad.

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