Mehrotra and Sarjeant, 1984a
From dinoflaj3
Mehrotra, N.C. and Sarjeant, W.A.S., 1984a: Archeopyle type in the dinoflagellate cyst genus Imbatodinium: some new observations. Micropaleontology, v.30, no.2, p.213-222, pl.1-2.