Meiourogonyaulax rioultii

?rioultii Sarjeant, 1965, p.181, pl.1, fig.1; text-fig.1 ex Sarjeant, 1968, p.229.  Holotype: Sarjeant, 1965, pl.1, fig.1.  Originally Meiourogonyaulax, subsequently Lithodinia, thirdly (and now) Meiourogonyaulax?, fourthly Lithodinia?.  This species is here retained in Meiourogonyaulax following the retention of the genus by Riding and Helby (2001d, p.81,83).  Questionable assignment: Stover and Evitt (1978, p.63) as a problematic species.  This name was not validly published in Sarjeant (1965, p.181) since the genus Meiourogonyaulax was not validly published until 1966.  Age: Early Callovian.

Parent: Meiourogonyaulax