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Calliarthron yessoense - National Museum of Nature and Science, Tokyo - DSC07642.JPG
Calliarthron yessoense
Scientific classification
Domain: Eukaryota
Kingdom: Archaeplastida
Division: Rhodophyta
Class: Rhodophyceae
Subclass: Nemaliophycidae
Order: Corallinales
Family: Corallinaceae
Subfamily: Corallinoideae
Genus: Calliarthron
Manza, 1937

Calliarthron is a genus containing four species of thalloid intertidal[1] alga. Specimens can reach around 30 cm in size. The thalli take a crustose form. The organisms lack secondary pit connections. Calliarthron reproduces by means of conceptacles; it produces tetraspores, dispores and carpospores. The genus has lignin and contains secondary cell walls, traits which are normally associated with the vascular plants.[1] It is similar to the genus Bossiella.[2]

Calliarthron is calcified, but also has uncalcified joints that allow it to flex in response to the waves to which it is subjected.[1] These joints start out calcified, and decalcify as they grow older.[1] After decalcifying they grow much longer, then fatten themselves up in the same way as xylem formation, resulting in secondary walls.[1]


The 4 species currently recognised are:

  • C. latissimum
  • C. tuberculosum
  • C. yessoense
  • C. cheilosporioides[1]


  • Guiry, M.D. & Guiry, G.M. (2008). "Calliarthron". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2009-01-27. 
  1. ^ a b c d e f Martone, Pt; Estevez, Jm; Lu, F; Ruel, K; Denny, Mw; Somerville, C; Ralph, J (Jan 2009). "Discovery of Lignin in Seaweed Reveals Convergent Evolution of Cell-Wall Architecture". Current biology : CB 19 (2): 169–75. doi:10.1016/j.cub.2008.12.031. ISSN 0960-9822. PMID 19167225. 
  2. ^ "Calliarthron spp. (erect, geniculate corallines)". Kelp Forest Ecology. 

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