Diatoms - Cavinula
Species are from freshwater, low nutrient environments high in oxygen, including damp soils.
Possibly Cavinula, 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.
See Cavinula on Algaebase or Diatoms.org or Natural History Museum of Wales website.
