Kumar et al., 1993
From dinoflaj3
Kumar, A., Sharma, J. and Kapoor, P.N., 1993: Selenopemphix maastrichta sp. nov.: the first pre-Tertiary record of the genus Selenopemphix (Benedek) Bujak in Bujak et al., 1980. Oil and Natural Gas Commission, Bulletin, v.30, no.2, p.139-146, pl.1.