Morphology of Aneurianna ogasawaraensis sp. nov. (Rhodomelaceae, Rhodophyta), A New Marine Deep Sublittoral Red Alga from the Ogasawara Islands, Japan

摘要

A new red alga, Aneurianna ogasawaraensis sp. nov. (Rhodomelaceae, Ceramiales, Rhodophyta) was collected from the deep sublittoral water (73-97 m in depth) off Hahajima Island and Chichi-jima Island, Ogasawara Islands, Japan. This genus was established by Phillips (in 2006) separating from Lenormandia (including Lenormandiopsis) mainly because of the presence of endogenous branching and elliptic blade-surface pattern ("elliptical areolation"). This new species from Ogasawara Islands belongs to Aneurianna in having "elliptical areolation' and is distinguishable from the other known species of the genus in having occasionally branching stipes, elliptical blades rounded at the base, dentate margins, and conspicuous midribs.