A genus with a very large number of species, many of which are hard to distinguish from other species.
Nitzschia, species undetermined. Found in diatomite deposit at Three Lakes, core TL5, at 3.6 to 3.7 m depth.
See Nitzschia on Algaebase or
Diatoms.org or on the
Natural History Museum of Wales website. Diatombase returns over 1000 species names.