Harwood, D.M. & Gersonde, R. (1990). Lower Cretaceous diatoms from ODP Leg 113 Site 693 (Weddell Sea). Part 2: Resting spores, chrysophycean cysts, an endoskeletal dinoflagellate, and notes on the origin of diatoms. In: Barker, P.F. et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, vol. 113. College Station, Texas (Ocean Drilling Program), 113: 403-426, available online athttps://doi.org/10.2973/odp.proc.sr.113.201.1990 page(s): p. 410; pl. 1, fig. 8, 9 [details]
Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2025). DiatomBase. Pseudopyxilla systena Harwood & Gersonde, 1990. Accessed at: https://www.diatombase.org/aphia.php?p=taxdetails&id=960246 on 2026-08-13
original descriptionHarwood, D.M. & Gersonde, R. (1990). Lower Cretaceous diatoms from ODP Leg 113 Site 693 (Weddell Sea). Part 2: Resting spores, chrysophycean cysts, an endoskeletal dinoflagellate, and notes on the origin of diatoms. In: Barker, P.F. et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, vol. 113. College Station, Texas (Ocean Drilling Program), 113: 403-426, available online athttps://doi.org/10.2973/odp.proc.sr.113.201.1990 page(s): p. 410; pl. 1, fig. 8, 9 [details]