Diatoms - Ulnaria
Ulnaria is an araphid genus (possessing no raphe); however they often attach to the bottom by a pad of mucialge secreted from one apex of the cell. Common in rivers and lakes. Ulnaria ulna is a freshwater species.
Ulnaria, species undetermined, found in diatomite deposit at Three Lakes, core TL5, at 3.6 to 3.7 m depth; also in core TL1 at 5.95 m depth.
Ulnaria or Tabularia (?) in TL1 at 5.99 m depth.
Ulnaria ulna in TL5.
See Ulnaria on Algaebase or Diatoms.org or on the Natural History Museum of Wales website.
