UC specimens and range limits for Coilodesme corrugata

• Blue markers: specimen records
• Yellow marker: type locality, if present
• Red markers: endpoints of range from literature

View map from the Consortium of Pacific Northwest Herbaria

Notes: Collected at Santa Catalina and San Clemente islands in California; Islas Los Coronados, Baja California, Mexico.

Status: This genus needs to be studied with molecular methods to confirm species boundaries. The distribution of this species overlaps with that of C. californica, but C. corrugata is usually shorter, broader and more deeply wrinkled than C. californica.

Habitat: In shallow, mostly protected sites

Life History: Probably alternation of heteromorphic phases, with zoospores from unilocular sporangia on macroscopic sporophytes germinating to produce tufts of diffusely branched filaments bearing plurilocular organs, subcultures of which produced successive generations of presumed plethysmothalli bearing both unilocular and plurilocular organs; macroscopic sporophytes not obtained in culture (Wynne 1972a). The thalli appear in June as minute, sealed sacs filled with a gelatinous liquid; they gradually increase in size, becoming wrinkled and folded and finally torn at the tips (D.A. Saunders 1898).

Search Sequences in GenBank

Coilodesme Stromfelt 1886

Thalli saccate, cylindrical to flattened, entire or sometimes with frayed divisions at maturity, mostly epiphytic, usually briefly stipitate, attached by a small disk or with rhizoids apparently penetrating host. Cortical cells mostly not in anticlinical rows, progressively larger inward. Chloroplasts discoid, without pyrenoid. Unangia narrowly to broadly pyriform or very irregular in form, scattered and singly embedded just below surface. Gametangial plants microscopic, bearing uniseriate plurangia.

Coilodesme corrugata S. & G.

Setchell & Gardner 1924b: 8; 1925: 582.

Thalli mostly less than 10 cm long and 2 cm broad, complanate, with finely wrinkled surface; walls 40-45 µm thick; outer cortical cells not in anticlinal rows; longitudinal filaments among inner cortical cells lacking; sporangia mostly broader than long.

Occasional epiphyte on Cystoseira neglecta, low intertidal to subtidal; known only from type locality, Santa Catalina I., Calif.

Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.

Notes: Distribution extended to San Clemente Island and Islas Coronados, Baja California, Mexico.