Dinoflagellate species Dingodinium cerviculum, Odontochitina operculata and Muderongia tetracantha in Lower Cretaceous strata of the Great Artesian Basin, Australia.
Reference:
Haskell,T.R. (1970)
Dinoflagellate species Dingodinium cerviculum, Odontochitina operculata and Muderongia tetracantha in Lower Cretaceous strata of the Great Artesian Basin, Australia. Proceedings of the Royal Society of Queensland
Vol. 81 # 5 P. 57- 68