RT Journal Article ID 432ecc7b217ca14e A1 Kulikovskiy, M.S. A1 Kuznetsova, I. V. T1 Biogeography of Bacillariophyta. Main Concepts and Approaches JF International Journal on Algae JO IJA YR 2014 FD 2014-07-25 VO 16 IS 3 SP 207 OP 228 K1 Bacillariophyta K1 protists K1 biogeography K1 distribution K1 species and species concepts K1 cryptic taxa K1 endemics and endemism K1 cosmopolitan taxa AB The historical reasons for the formation of approaches to biogeography and distribution of diatoms are analyzed. One of the prevailing concepts was cosmopolitan distribution of diatoms. Approach described by sentence "everything is everywhere, the environment selects" is discussed. The idea concerning local distribution of many taxa is substantiated; it is supported by modern ideas about species concept in diatoms and presence of cryptic and pseudocryptic diversity. New data about allopatric and sympatric speciation in diatoms and other protists are discussed. Presence of species flocks in ancient basins, flagship taxa, hotspots and dark diversity are discussed and illustrated by original data. The concept of endemic areas is discussed. PB Begell House LK https://www.dl.begellhouse.com/journals/7dd4467e7de5b7ef,3ac09f7152a36d69,432ecc7b217ca14e.html