<i>SKELETONEMOPSIS</i>, A NEW GENUS BASED ON THE FOSSIL SPECIES OF THE GENUS<i>SKELETONEMA</i>GREV.

Abstract

The fossil species Skeletonema barbadense Grev. and S. simbirskianum A. Schmidt, together with four new fossil species, have been examined by LM and SEM and found to be unrelated to the living members of the genus. A new genus, Skeletonemopsis P. A. Sims, has been created for them and assigned to the family Trochosiraceae; descriptions of the new species are given and relationships with other genera established.