''Mennerius'' is a genus of haptophytes belonging to the family

Lapideacassaceae Lapideacassaceae is a family of haptophytes belonging to the class Prymnesiophyceae. The family Lapideacassaceae accommodate ‘bell-shaped’ to cylindrical nannoliths with body consisting of a single or several vertically elongated calcite ele ...

Diagnosis

The genus accommodates ‘bell-shaped’ to cylindrical nannoliths with their body consisting of one or more tiers of vertically elongated

calcite Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on ...

plates and a rounded or somewhat pointed apical cone. One or more apical spines are often also present. The cross section of the body is round to polygonal.

Species

*'' M. asymmetricus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *'' M. bispinosus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *'' M. blackii'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *'' M. cornutus'' (Forchheimer & Stradner, 1973) *'' M. glans'' (Black, 1971) *'' M. longus'' Luljeva, 1967 *'' M. magnificus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *'' M. mariae'' (Black, 1971) *'' M. morosus'' Luljeva, 1967 *'' M. tricornus'' (Wind & Wise in Wise & Wind, 1977) *'' M. trispinus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *'' M. varius'' (Crux, 1981) *'' M. wisei'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977)

Distribution

The species of the genus occur sporadically but widely in the uppermost Lower and Upper Cretaceous and Palaeogene sediments in the Northern Hemisphere, South Atlantic, South Africa, Indian Ocean and

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

References

Haptophyte genera {{Haptophyte-stub