Hommersand et al. (1993) transferred this species to the genus Chondracanthus; C. teedei (Mertens ex Roth) K¨utzing (basionym: Ceramium teedei Mertens ex Roth; synonym: Gigartina teedei (Mertens ex Roth) J.V. Lamouroux), originally described from Portugal (Guiry, 1984), is widespread in the northeastern Atlantic, Mediterranean and the Black Sea (Ardré, 1970; Orfandis, 1993). It has also been reported from Japan (Mikami, 1965), the Indian Ocean (Silva et al., 1996) and Brazil (Ugadim, 1975). In France, Spain and Portugal, the species is frequent in the lower intertidal zone on sheltered habitats. Rodrigues (1958) described it as new variety, C. teedei var. lusitanicus (Rodrigues) Bárbara and Cremades (basionym: Gigartina teedei (Roth) J.V. Lamouroux var. lusitanica Rodrigues). Ardré (1970) and Bárbara and Cremades (1996) reported this variety in several Portuguese localities and the North West coast of Spain (Ría de A Coruña), respectively.

NE Atlantic (Spain and Portugal).

This species has a life-history with an alternation of isomorphic gametophytes and tetrasporophytes.
The life cycle and the reproductive morphology have been described by Guiry (1984) and Braga (1985, 1990) and, according to this latter author, in nature there always seems to be a higher proportion of gametophytes than tetrasporophytes.

However, a population of C. teedei from Buarcos (Figueira da Foz, Portugal) has shown to have a clear predominance of tetrasporic plants, as compared to female gametophytes (Pereira and Mesquita, 1994, Pereira, 1996).

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. (1993). New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium 14: 105-120, 41 figs.

Bárbara, I. & Cremades, J. (1996). Seaweeds of the Ría de A Coruña (NW Iberian Peninsula, Spain). Botanica Marina 39: 371-388.

Pereira, L. & Mesquita, J.F. (2004). Population studies and carrageenan properties of Chondracanthus teedei var. lusitanicus (Gigartinaceae, Rhodophyta). Journal of Applied Phycology 16: 369-383.