PT Journal AU MARVAN P. GERIS & RAMEZANPOOR, R Z. TI Navicula citrus KRASSKE (Bacillariophyceae) in the Czech Republic SO Czech Phycology PY 2003 BP 37 EP 40 VL 3 IS 1 AB Navicula citrus KRASSKE (1923), an extremely rare species of the Czech diatom flora, was up to now known from a few South Moravian localities (BILY 1945). Its recent findings, mainly in running waters, both in the River Morava Basin and the River Labe Basin, suggest the possibility of its just beginning expansion wave. ER