- PMID 36781894.
Retrieved 23 June 2023. Mattioli, Emanuela; Pittet, Bernard;
Palliani,
Raffaella Bucefalo; Röhl, Hans-Joachim; Schmid-Röhl, Annette; Morettini...
-
Central Apennines)". Geol. Romana. 7: 1–26.
Retrieved 7 July 2023.
Bucefalo Palliani, R .; Mattioli, E. (1994). "Enrichment in
organic matter within the Early...
- then, no
other species have been
added to the genus,
however in 2002,
Palliani and
Riding placed Polarella into the
subfamily Umbriadinioideae based on...
