Family Aulacoseiraceae Crawford 1990 (diatom)
Bacillariophyceae - Aulacoseirales - Aulacoseiraceae
Parent taxon: Aulacoseirales according to F. E. Round et al. 1990
Sister taxa: none
Subtaxa: Aulacoseira Eoseira
Ecology: "photoautotroph"
Distribution:
• Blancan of United States (1: Oregon collection)
• Eocene of Canada (4: British Columbia, Lac de Gras)
Total: 5 collections each including a single occurrence