Manguin (1960: 285, pl. 10, figs 106–109)
Priddle & Fryxell (1985: 36, figs A–D), Hasle & Syvertsen (1997: 203)
Cells in short straight chains, octagonal in girdle view, isovalvate; apical axis 14–27 µm; pervalvar axis 11.5–16 µm. Apertures between adjacent cells large, hexagonal. Setae smooth, slightly inflated towards the base, ±at right angles to the pervalvar axis. Chloroplasts small, spherical, numerous, distributed throughout the cell and into the setae.
Weddell-Scotia Sea (Garrison et al., 1987); southern cold-water regions (Priddle & Fryxell, 1985); Terre Adélie (Manguin, 1960).
Chaetoceros hendeyi is supposedly endemic to southern cold-water regions, but it has rarely been reported since the original description. Some cells found in the present study were larger (apical axis 17–27 µm) than previously documented (14–18 µm). Hasle & Syvertsen (1997: 203) noted the possibility that this might be conspecific with C. borealis Bailey from cold-water regions of the Northern Hemisphere.