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Electronic Flora of South Australia Species Fact Sheet
Phylum Rhodophyta – Class Florideophyceae – Order Corallinales – Family Corallinaceae – Subfamily Corallinoideae – Tribe Janieae
Synonyms
Cheilosporum pulchellum Harvey 1855a: 547; 1863, synop.: xxix. De Toni 1905: 1834. Huisman & Walker 1990: 411. Lucas & Perrin 1947: 397. May 1965: 356. Sonder 1881: 20. Srimanobhas et al. 1990: 110.
Jania affinis Harvey 1855a: 547; 1863, synop.: xxix. De Toni 1905: 1857. De Toni & Forti 1923: 63? Huisman & Walker 1990: 412. Sonder 1881: 21. Yendo 1905: 39.
Thallus (Fig. 140A, B) medium to dark red to red-brown, 2–6 cm high, branches compressed below, terete above. Fronds erect, more or less complanately branched, intergenicula dimorphic (Fig. 140B, C), flat and broad below (like Cheilosporum) and terete above (like Jania). Lower intergenicula compressed and bibbed, lobes pointed to broadly rounded (occasionally very slight), intergenicula (300–) 400–1000 (–1500) µm long and (200–) 500–1000 (–1250) µm broad. Upper intergenicula terete or subterete (300–) 500–1200 (–1500) µm long and (80–) 100–250 (–300) µm in diameter. Genicula (60–) 80–110 (–200) µm long. Holdfasts stoloniferous, stolons terete to slightly compressed, 150–300 µm in diameter; usually epiphytic on larger algae, possibly epilithic. Structure. Lower intergenicula of (3–) 4–9 tiers (Fig. 140D) of medullary cells each (80–) 100–140 (–160) µm long; upper intergenicula of (3–) 5–9 (–14) tiers of medullary cells each 80–160 (–200) µm long.
Reproduction: Gametangial thalli dioecious. Female conceptacles amphoroid with short necks, externally 350–450 µm long and 350–400 µm in diameter; carposporangia subspherical, 60–80 µm in diameter. Male conceptacles (Fig. 140E) terminal, elongate-ovoid to fusiform; externally (400–) 550–650 µm long and 200–280 µm in diameter, internally 140–240 µm in diameter, canal 70–100 µm long.
Tetrasporangial conceptacles bearing 2–3 (–4) terete branches, only occurring in terete branches which arise from apices of flat intergenicula or adventitiously from their surfaces; external diameter 450–500 µm, internal diameter 100–350 µm; tetrasporangia 150–300 µm long and 35–80 µm in diameter.
Type from Rottnest I., W. Aust., (Harvey, Tray. Set 250); holotype in TCD, isotypes (Harvey, Alg. Aust. Exsicc. 446) in other herbaria.
Selected specimens: Coronation I., Houtman Abrolhos, W. Aust., on Sargassum fallax (Aquinas Coll. Exp. B14, 24.viii.1970; AD, A43856). Limestone Bay, Middle I., Recherche Arch., W. Aust., on Sargassum, drift (Willis, 25.xi.1950; AD, A15892). Waldegrave I., S. Aust., 22 m deep (Shepherd, 23.x.1970; AD, A37403). Waterloo Bay, S. Aust., 5–7 m deep inside bar (Shepherd, 30.x.1981; AD, A52572, A52749). Pearson I., S. Aust., on steep slopes 22 m deep (Shepherd, 8.i.1969; AD, A52599) and 22 m deep (Shepherd, 12.i.I969; AD, A34028). Thistle I., S. Aust., 16 m deep (Baldock, 2.i.1964; AD, A27229). Port Elliot, S. Aust., drift (AD, A542). Lawrence Rock, Portland, Vic., 12–15 m deep (Watson, 30.xi.1981; AD, A52796). Lonsdale Bight, Port Phillip Heads, Vic., 3 m deep (Macpherson, 21.1/.1961; AD, A28574)? Gabo I., Vic., 8 m deep (Shepherd, 19.ii.1973; AD, A52778).
Distribution: Houtman Abrolhos, W. Aust., to Lawrence Rocks, Portland (probably to Gabo I.), Vic., in deep water on rough-water coasts, epiphytic on various algae.
Taxonomic notes: Jania pulchella is distinctive in having lower intergenicula like those in Cheilosporum (although variable in degree of development) and upper intergenicula as in Jania. It appears to be a deep water species, usually epiphytic.
References:
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. (1905). Sylloge Algarum omnium hucusque Cognitarum. Vol. 4. Florideae. Sect. 4, pp. 1523–1973. (Padua.)
HARVEY, W.H. (1855a). Some account of the marine botany of the colony of Western Australia. Trans. R. Ir. Acad. 22, 525–566.
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.
JOHANSEN, H.W. & WOMERSLEY, H.B.S. (1994). Jania (Corallinales, Rhodophyta) in southern Australia. Aust. Syst. Bot. 7, 605–625.
LUCAS, A.H.S. & PERRIN, F. (1947). The Seaweeds of South Australia. Part 2. The Red Seaweeds. (Govt Printer: Adelaide.)
MAY, V. (1965). A census and key to the species of Rhodophyceae (red algae) recorded from Australia. Contr. N.S.W. natn. Herb. 3, 349–429.
SONDER, O.W. (1881). In Mueller, F., Fragmenta Phytographiae Australiae. Supplementum ad volumen undecinum: Algae Australianae hactenus cognitae, pp. 1–42, 105–107. (Melbourne.)
SRIMANOBHAS, V., BABA, M., AKIOKA, H., MASAKI, T. & JOHANSEN, H.W. (1990). Cheilosporum (Corallinales, Rhodophyta) in Japan: a morphotaxonomic study. Phycologia 29, 103–113.
YENDO, K. (1905). A revised list of Corallinae. J. Coll. Sci., Imp. Univ. Tokyo 20 (12), 1–46.
The Marine Benthic Flora of Southern Australia Part IIIB complete list of references.
Publication:
Womersley, H.B.S. (28 June, 1996)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIB. Gracilarialse, Rhodymeniales, Corallinales and Bonnemaisoniales
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIIB 1996, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.
Illustration in Womersley Part IIIA, 1996: FIG. 140.
Figure 140 enlarge
Fig. 140. Jania pulchella (A–C, AD, A27229; D, AD, A542; E, AD, A28574). A. Habit. B. Lower cheilosporoid segments and upper janioid branches. C. Ditto, tetrasporangial plant. D. Longitudinal segment of branch with 3 tiers in the intergeniculum. E. Male conceptacles.
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