Résumé :
|
During three decades of the present century (1920-1950) krasske was an important author in the field of diatom research. altogether 270 descriptions of new taxa from central-europe, scandinavia, the arctic, asia minor and south america were counted. this documentation contains the protologues of all the taxa introduced by krasske. moreover, all these taxa are represented by new microphotographs of the holotypes, lectotypes and other specimens from the type-slides or other authentic slides. another aim of this monograph is to evaluate krasske's taxa critically from the contemporary and likewise from the recent point of view.
|