Diatoms - Aulacoseira
A freshwater planktonic genus, most commonly found in large rivers and lakes.
Aulacoseira (species unidentified) found in diatomite deposit at Three Lakes, core TL5, at 3.6 to 3.7 m depth., and also in core TL1, at 5.95 m depth, silt.
See Aulacoseira on Algaebase or Diatoms.org. Not found on the Natural History Museum of Wales website.
