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Name derivation:

Ano (Gr.) – upward; trichinos – hairy


Anotrichium  Nägeli 1862;  14 of 20 species descriptions are currently accepted taxonomically (Guiry and Guiry 20160

Subclass Florideophyceae;  Order Ceramiales;  Family Wrangeliaceae

Common name:  Forked Twig-weed



Erect, up to 30 cm tall, branched, multinucleate cells.  Groups of polychotomous trichoblast at upper end of some cells.Enlarged hypogenous cell with a whorl of post-fertilization involucral branches (Ibid.).

Similar genera:

Criffithsia, Callithamnion


Florida, Lesser Antilles, British Isles to Spain, the Mediterranean, eastern tropical Atlantic (Dawes and Mathieson 2008).



Dawes, C.J. and A.C. Mathieson 2008. Seaweeds of Florida. University Press of Florida (592 pp).

Guiry, M.D., and G.M. Guiry  2013.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.  http://www.algaebase.org; searched on 16 January 2013.

Nägeli, C.  1862 '1861).  Beiträge zur morphologie und systematik der Ceramiaceae.  Sitzungsberichte der Königlichen Bayerischen Akademie der Wissenschaften zu München 1861(2): 297-415, 30 figs, 1 pl.