2024 Volume 99 Issue 4 Pages 242-251
The fine structure of a benthic diatom Gomphonemopsis novozelandicum was examined using light and scanning electron microscopy. The following morphological features of this species are first revealed in detail through the present study. The areola is occluded by a hymen with perforations arranged in a centric array pattern. The mature cingulum consists of five–six girdle bands, open at one pole, divided into two types: a valvocopula without rows of areolae, opens at the head pole; the 2nd–6th bands with two rows of areolae, are thinner than the valvocopula in maximum width, but broader in closed part. Ligulae and antiligulae are observed at the closed part of the 2nd and 4th bands. Morphological differences between this species and related species are discussed. This epiphytic species is found over a wide area from Ehime to Hokkaido in Japan. (Continued from J. Jap. Bot. 99: 75–84, 2024)
