Bacillariophyceae - Rhizosoleniales - Pyxillaceae
Full reference: R. Simonsen. 1972. Ideas for a more natural system of the centric diatoms. Beihefte Zur Nova Hedwigia 39:31-54
Parent taxon: Rhizosoleniales according to F. E. Round et al. 1990
See also Andrews 1976 and Simonsen 1972
Sister taxon: Rhizosoleniaceae
Subtaxa: Pyrgupyxis Pyxilla
Ecology: "photoautotroph"
Distribution:
• Quaternary of North Pacific (5 collections), Southern Ocean (6)
• Pliocene to Pleistocene of North Pacific (1), Southern Ocean (1)
• Pliocene of North Pacific (3), Southern Ocean (2)
• Miocene of Indian Ocean (1), Southern Ocean (4), United States (1: North Carolina)
• Oligocene of Southern Ocean (17)
• Eocene of the Russian Federation (1)
Total: 42 collections each including a single occurrence