Morphology and Taxonomy of Marine Benthic Diatoms (11), Genus Seminavis (Naviculaceae, Naviculales) (Part 2)
2023 Volume 98 Issue 1 Pages 13-18
Details
2023 Volume 98 Issue 1 Pages 13-18
Seminavis exigua Chen, Zhuo & Gao (Naviculaceae, Naviculales), a brackish water and marine benthic diatom, is reported as new to Japan. It was found on Cladophora sp. and sea bottom sand obtained from the coasts of Yokohama, Kanagawa Pref. and Teuri Island, Hokkaido. Its morphology has been examined by light and scanning electron microscopies. The following morphological features of this species are first revealed in detail through the present study. The ventral axial area is narrow, and the accessory rib is not developed. The mature cingulum consists of four non-areolae bands with alternating orientation: a broad valvocopula, the short segmental 2nd and 4th bands, and the narrow 3rd band.
