Palmaria hecatensissp. nov. (Rhodophyta, Palmariales) from British Columbia and Alaska with a survey of otherPalmariaspecies

摘要

Palmaria hecatensissp. nov. is described based on material from northern British Columbia. Male gametophytes and tetrasporophytes are thick, coriaceous, flattened blades, linear to lobed in habit and arise from an extensive encrusting basal holdfast. Putative female gametophytes are microscopic multicellular discs.Palmaria hecatensisgrows on rocky shores in the midintertidal to lower intertidal zones and has a known geographical distribution from Nootka Island, Vancouver Island, B.C., to Shemya Island in the Aleutian Islands, Alaska.Palmaria hecatensisis compared with other species in the genus and, in addition, another distinctive (and possibly undescribed)Palmariaspecies from British Columbia and Alaska is discussed, bringing the total number ofPalmariaspecies reported in the North Pacific Ocean to six.