†Pirea levigata Tongiorgi, Lei-ming & Di Milia 1995

Tongiorgi, Lei-ming & Di Milia 1995. Arenigian acritarchs from the Daping section (Yangtze Gorges area, Hubei Province, southern China) and their palaeogeographic significance. Review of Palaeobotany and Palynology, 86(1-2), May 1995: 13-48