Microseris de Fromentel, 1867

Löser, Hannes, 2013, Revision of the family Asteroseriidae (Anthozoa, Scleractinia, Cretaceous), Geodiversitas 35 (1), pp. 21-29 : 27

Genus Microseris de Fromentel, 1867

TYPE SPECIES. — Microseris hemisphaerica de Fromentel, 1867 by monotypy.

DIAGNOSIS. — Solitary patellate corallum. Calicular outline circular. Septa compact. Microstructure of septa unknown. Septa in cross section externally slightly thicker, and slightly thinner towards the centre. Septal maximum thickness 100 µm. Symmetry of septa radial and regularly hexameral. Cycles of septa regular. Septal cycles differ in length, almost not in thickness. Septa of the first two cycles extended to the centre of the calice, later cycles are shorter. Septa of younger cycles often and regularly connected to septa of preceeding ones. Septal upper margin unknown, lateral face with fine thorns. Pali or paliform lobes absent. Synapticulae present, forming a more or less regular ring. Columella poorly defined; it is probably composed of some granulae. Costae unknown. Endotheca unknown. Wall present, compact, formation unknown.

RANGE. — Middle to Late Cenomanian.