Nereia lophocladia J.Agardh (1897:97)



Taxonomy & Nomenclature



Conservation Status

[Last record: late 1800's? (1888?)]

[Rediscovered on 29 August 1980? (cf. Millar & Kraft, 1994:22)]

Last record: 2002 (Yee, 2007)

Rediscovered on 10 September 2015 (Yee & Finley, 2015; Yee et al., 2017:528)



New South Wales (multiple localities) & Port Phillip Heads, Victoria, Australia

Type locality: Port Phillip Heads, Victoria (Womersley, 1987:272; Millar & Kraft, 1994:22; contra Yee et al., 2017)


The type population at Port Phillip Heads (Victoria) has apparently not been observed since the late 1800's (Yee et al., 2017), and the species was potentially rediscovered after almost a century in 1980 (cf. Millar & Krafft, 1994:22) on the northern side of Muttonbird Island, Coffs Harbour (NSW). It then disappeared here, its only known locality, for 13 years until rediscovered on 10 September 2015 (Ibid.). Happily, it has more recently been reported to occur along a 70km stretch of the NSW coastline, although some populations are extremely small (Mamo et al., 2021b).


Biology & Ecology










Original scientific description:

Agardh, J. G. (1897). Analecta Algologica. Continuatio IV. Lunds Universitets Årsskrift, Andra Afdelningen, Kongl. Fysiografiska Sällskapets i Lund Handlingar 33(9): 1-106, 2 plates.


Other references:

Coleman, Melinda A., Kelaher, Brendan P. et al. (2018). Critically Endangered Algal Couture. Journal of Biodiversity & Endangered Species 6: 2.

Coleman, M. A., Weigner, K. E. and Kelaher, B. P. (2017). Optimising DNA extraction from a critically endangered marine alga. Conservation Genetics Resources. doi:10.1007/s12686-017-0810-5 [Abstract]

M.D. Guiry in Guiry, M.D. & Guiry, G.M. 22 August 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 07 October 2023

Mamo, Lea T., Coleman, Melinda A. and Kelaher, Brendan P. (2021a). Ecological enhancement of breakwater upgrades: size and type of rocks used influence benthic communities. Marine Ecology Progress Series 661: 71-82.

Mamo, Lea T., Wood, Georgina, Wheeler, David, Kelaher, Brendan P. and Coleman, Melinda A. (2021b). Conservation genomics of a critically endangered brown seaweed. Journal of Phycology 57(4): 1345-1355.

Millar, A. J. K. (2003). The world's first recorded extinction of a seaweed, pp. 313-318. In: A. R. O. Chapman; Robert J. Anderson and Valerie J. Vreeland (eds). Seventeenth International Seaweed Symposium: proceedings of the seventeenth International Seaweed Symposium, Cape Town, South Africa, 28 January—2 February 2001. New York: Oxford University Press.

Millar, A. J. K. and Kraft, G. T. (1994). Catalogue of the marine brown algae (Phaeophyta) of New South Wales, including Lord Howe Island, South-western Pacific. Australian Systematic Botany 7: 1-46.

Womersley, H. B. S. (1967). A critical survey of the marine algae of southern Australia. II. Phaeophyta. Aust. J. Bot. 15: 189-270.

Womersley, H. B. S. (1987). The marine benthic flora of southern Australia. Part II. pp. [1]-484, 169 figs, 1 table, 8 plates, 4 maps. Adelaide: South Australian Government Printing Division.

Yee, N. R. (2007). Phylogenetic studies of the marine brown algal orderSporochnales (Phaeophyceae). PhD Dissertation, University ofMelbourne

Yee, N. R. and Finley, L. A. (2015). Targeted surveys for critically endangered marine brown alga Nereia lophocladia. Coffs Harbour Underwater Inspection – Northern Breakwater Upgrade Project. Report prepared by Elgin Associates for NSW DPI Lands, 21 September 2015.

Yee, N. R., Finley, L. A., Roberts, A., Kelaher, B. and Millar, A. J. K. (2017). Re-discovery of the critically endangered marine brown alga, Nereia lophocladia (Order Sporochnales) at Coffs Harbour, NSW, Australia. Marine Biodiversity 49(1): 527-529.


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