IVANOVELLA Pronina, 1969

 

 

Type species: Ivanovella isensis Pronina, 1969; OD.

Ivanovella Pronina. 1969 (*2477), p. 27.

Test free, spherical; wall thick, calcare­ous, two layered, with very thin dark micro-granular inner layer and gray to brown outer layer, from the dark layer radiate both hollow projections that open to the exterior and others that are terminally closed; aperture consisting of openings at the ends of some projections. Silurian (Ludlovian); USSR: central Urals.