Dasya atropurpurea sp nov (Ceramiales, Rhodophyta), a deep-water species from the Hawaiian Archipelago

PS. VROOM. 2005. Dasya atropurpurea sp. nov. (Ceramiales, Rhodophyta), a deep-water species from the Hawaiian Archipelago. Phycologia 44: 572-580. Dasya atropurpurea sp. nov. is the 11 and largest known species of Dasya to occur on tropical central Pacific islands. The species is reported only from deep-water habitats between 20 and 170 m depths around the Hawaiian island chain and exhibits anatomical and reproductive features substantially different from the five other described species of Dasya in Hawaii. Critical comparison of features present in D. otropurpurea to original species diagnoses, herbarium specimens, and published descriptions of the other 75 recognized species of Dasya revealed the new species' overall stature, the development of three-celled carpogonial branches, the occasional but regular occurrence of adventitious branches, and the thin, lax, terminally tufted pseudolateral branches to be unique to D. atropurpurea. Based on anatomical features, the closest relatives of D. atropurpurea are most likely D. extensa and D. villosa.