Gu Haifeng et al., 2015
From dinoflaj3
Gu Haifeng, Liu Tingting and Mertens, K.N., 2015: Cyst-theca relationship and phylogenetic positions of Protoperidinium (Peridiniales, Dinophyceae) species of the sections Conica and Tabulata, with description of Protoperidinium shanghaiense sp. nov. Phycologia, v.54, no.1, p.49-66.