Genus: |
Petalonia Derbès & Solier |
Description: |
Thallus consists of erect, light to dark brown, dorsoventrally flatened lamina, arising from a holdfast singly or in clusters; linear or broadly lanceolate to almost elliptical, abruptly or gradually narrowining towards the base and merging into a elliptical, abruptly or gradually narrowing towards the base and merging into a short stipe, only slightly narrowing at the tip, rounded and often frayed. Thallus undivided, membranous and thin when young, later leathery-tough with smooth, sometimes undulating, margins. The species is very polymorphic especially in relation to thallus width. Download PDF from Algaebase |
Biogeography |
N NE Atlantic (Greenland to Canary Is); Mediterranean; NW Atlantic (Artic to New Jersey; SE Atlantic (Senegal, Namibia, S Africa); SW Atlantic (Brazil, Uruguay); Indian Ocean (Pakistan, S Africa); NW Pacific (Japan, China); NE Pacific (Alaska to California); SE pacific (Chile); Australia, New Zealand; Antarctica and Su-Antarctica. |
Life Cycle |
Facultative alternation of heteromorphic phases, with dioecious erect blades producing isogametes in plurilocular organs and the zygote developing into a crustose sporophyte bearing unilocular sporangia; zooids from unilocular sporangia developing into blades; crusts rarely producing blades directly; unfused gametes developing parthenogenetically into crusts (Kogame 1997; Shannon et al. 1988b; Wynne 1972a, p. 139; Wynne 1972b, p. 133; Hsiao 1969; Wynne 1969a, p. 17) |
Uses and compounds |
Direct use as food - food, consumed whole |
References |
Braune, W. (2008). Meeresalgen. Ein Farbbildführer zu den verbreiteten benthischen Grün- Braun- und Rotalgen der Weltmeere. pp. [1]-596, 266 pls. Ruggell: A.R.G. Gantner Verlag. Dawes, C.J. & Mathieson, A.C. (2008). The seaweeds of Florida. pp. [i]- viii, [1]-591, [592], pls I-LI. Gainesville, Florida: University Press of Florida. Fletcher, R.L. (1987). Seaweeds of the British Isles. Vol. 3. Fucophyceae (Phaeophyceae). Part 1. pp. i-x, 1359, 90 figs, 15 pls. London: British Museum (Natural History). Kraft, G.T. (2009). Algae of Australia. Marine benthic algae of Lord Howe Island and the southern Great Barrier Reef, 2. Brown algae. pp. [i-iv], v-vi, 1-364, 107 figs. Erratum of fig. 73 from vol. 1. Canberra & Melbourne: Australian Biological Resources Study and CSIRO Publishing. Lindeberg, M.R. & Lindstrom, S.C. (2010). Field guide to the seaweeds of Alaska. pp. [i-]iii-iv, 1-188, numerous col. photographs. Fairbanks: Alaska Sea Grant College Program. Loiseaux-de Goër, S. & Noailles, M.-C. (2008). Algues de Roscoff. pp. [1]-215, col. figs. Roscoff: Editions de la Station Biologique de Roscoff. Mondragon, J. & Mondragon, J. (2003). Seaweeds of the Pacific Coast. Common marine algae from Alaska to Baja California. pp. iv, 5-97. Monterey, California: Sea Challengers. Pedroche, P.F., Silva, P.C., Aguilar Rosas, L.E., Dreckmann, K.M. & Aguilar Rosas, R. (2008). Catálogo de las algas benthónicas del Pacífico de México II. Phaeophycota. pp. [i-viii], i-vi, 15-146. Mexicali & Berkeley: Universidad Autónoma Metropolitana and University of California Berkeley. Ricker, R.W. (1987). Taxonomy and Biogeography of Macquarie Island Seaweeds. pp. vi + (2) + 344. London: British Museum (Natural History). Womersley, H.B.S. (1987). The marine benthic flora of southern Australia. Part II. pp. 481, 169 figs, 1 table, 8 plates, 4 maps. Adelaide: South Australian Government Printing Division. Wynne, M.J. (1998). A checklist of benthic marine algae of the tropical and subtropical western Atlantic: first revision. Nova Hedwigia Beihefte 116: iii, 1-155, 5 figs.. |
Habitat: |
This annual is found growing on rock in the mid intertidal to shallow subtidal from protected to semi-exposed habitats. |
Type information: |
Basionym: Fucus fascia O.F.Müller Type locality: near Kristiansand, Norway (Silva, Basson & Moe 1996: 632). Notes: Womersley (1987: 292) gives the following data: Type from Christiansund, Norway; probably non-existent. |