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Name derivation:

Callophyllis cristata (sometimes designated as Euthora cristata)

Euthora = L. eu: good, well + thore: sperm- i.e. “well seeded”

cristata  = L.: having a crest or plume

Common name= lacy red weed


Callophyllis Kützing, 1843;  60 of 105 species descriptions are currently accepted taxonomically (Guiry and Guiry 2014).

Order Gigartinales;  Family Kallymeniaceae



Algae are bushy, 3-6 (-13) cm tall, soft but cartilaginous, pink, bright crimson, or brownish red, freely branched, and with one or more fronds attached by a small disc.  Fronds compressed below and flattened above, repeatedly alternate to almost pinnately or subdichotomously branched above.  Segments are successively smaller, narrower, and dense above, with rounded angles, spreading, and with linear terminal parts that are deeply cut at tips.  Medulla is multiaxial, cortex composed of 1 (-2) cell layers. Tetraspores irregularly cruciate.  Gametophytes dioecious

Similar genera:

Callophyllis, particularly on the Pacific Coast of North America

Demand For Edible Seaweeds:

In Chile, the demand of edible seaweeds has increased during recent years and Callophyllis variegata is one of the most demanded species. This study summarizes information on phenology, aspects, in vitro culture and vegetative propagation methods for Callophyllis. Results indicate that spore production occurs mainly during winter, and recruitment of new plants appears in nature in the spring (Hernandez et al. 2002).

Antioxidant Activity:

The antioxidant properties of the red seaweed Callophyllis japonica were investigated. An ethanol extract isolated from C. japonica exhibited intracellular reactive oxygen species, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and lipid peroxidation inhibitory activity. The radical scavenging activity of the extract protected the viability of Chinese hamster lung fibroblast (V79-4) cells exposed to H2O2. These findings suggest that C. japonica exhibits antioxidant properties (Kang etal, 2005).




In the Northwest Atlantic the alga is uncommon to locally common; it is a perennial taxon that is epiphytic on larger algae, as well as occurring on rocks, sponges, and hydroids. Found in deep lower tide pools and to 40 m.




Guiry, M.D. and G.M. Guiry  2014.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 2 May 2014.

Hernandez, M.C., G. Aroca, and L. Filcen  2002.  Reproductive, culture and regeneration studies of the edible red alga Callophyllis in Chile. Journal of Phycology Vol. 36.No. 3 (2002): 29-30.

Kang, K.A., H.D. Bu, D.S. Park, G.M. Go, Y. Jee, T. Shin and J.W. Hyun  2005.  Antioxidant Activity of Ethanol Extract of Callophyllis Japonica.  Phytotherapy Research. 19(6): 506-10.

Kützing, F.T.  1843.  Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange... Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.

Taylor, W. R.  1957.  Marine Algae of the Northeastern Coast of North America. Revised edition. Univ. Michigan Press., Ann Arbor, ix + 509 pp.