THE MORPHOLOGY AND TAXONOMY OF THE CENTRIC DIATOM GENUS<i>PARALIA.</i>I.<i>PARALIA SIBERICA</i>COMB. NOV.

Abstract

Paralia sulcata (Ehrenb.) Cleve is confirmed as the correct name for the type species of Paralia. This species is distinguished from another fossil species, Paralia siberica (A. Schmidt) Crawford & Sims, comb. nov. which has two varieties, P. siberica var. siberica and P. siberica var. laevis Crawford, nom.nov. This species and its two varieties are described.