Eualaria

Eualaria
Eualaria fistulosa on the Kenai Peninsula, Alaska
Scientific classification
Domain:	Eukaryota
Clade:	Diaphoretickes
Clade:	Sar
Clade:	Stramenopiles
Phylum:	Ochrophyta
Class:	Phaeophyceae
Order:	Laminariales
Family:	Alariaceae
Genus:	Eualaria Areschoug 1884
Species:	E. fistulosa
Binomial name
Eualaria fistulosa (Postels & Ruprecht) M.J.Wynne 2009
Synonyms [1]
Alaria fistulosaPostels & Ruprecht 1840 Alaria fistulosa f. platyphyllaSetchell 1901 Alaria fistulosa f. stenophyllaSetchell 1903 Orgyia fistulosa(Postels & Ruprecht) Trevisan 1845 Phasganon fistulosum(Postels & Ruprecht) Ruprecht 1850 Druehlia fistulosa(Postels & Ruprecht) C.E.Lane & G.W.Saunders 2007

Eualaria is a monotypic genus of subtidal kelp containing the species Eualaria fistulosa (synonym Alaria fistulosa). ^[1] Its native Alaskan name is Kausam.^{[ clarification needed ]}

Description

The entire plant consists of a holdfast and a single very large frond or lamina. In one instance, at Anchor Point, Cook Inlet, Alaska, a lamina collected by Griggs and Rigg was 22 meters (72 ft) long by 170 cm (67 in) wide. ^[2] Other laminae have been measured as wide as 252 cm (99 in) ^[3] and others as long as 25 m (82 ft) ^[4] Unusually among kelps, the laminae of Eualaria have midribs.

Distribution and habitat

It is native to the northern Pacific Ocean, where it ranges from the coast of Alaska and the Aleutian Islands to the Commander Islands, Russian Far East, Sakhalin, Kuril Islands, and Japan. It grows in the subtidal zone to a depth of 10 meters. ^[1]

References

1. Guiry, M.D. (3 January 2021). "Eualaria Areschoug, 1884". AlgaeBase. National University of Ireland, Galway. Retrieved 15 January 2025.
2. Frye, T.C.; Rigg, G. B.; Crandall, W.C. (December 1915). "The Size of Kelps of the Pacific Coast of North America". Botanical Gazette. 60 (6): 481. doi:10.1086/331689.
3. Frye, Bot. Gazette, loc.cit.
4. Setchell, William A.; Gardner, Nathaniel L. (March 31, 1903). "Algae of Northwestern North America". University of Cailfornia Publications in Botany. <not given>: 277.