LUCAS-CLARK, Joyce, & Javier HELENES 2000 (Dec. 1) Ynezidinium, a new genus within the Gonyaulacaceae (fossil Dinophyceae) Journal of Micropalaeontology 19(2): 113-121, 10 figs., 2 pls. Ynezidinium brevisulcatum, Y. latolineatum, Y. pentahedrias, Y. waipawaense, Y. malloyi