Amphipleuraceae (Bacillariophyceae) do alto da bacia do Ribeir？o Cambé, Londrina, Brasil

the upper cambé river basin, located in an urban region of londrina city, paraná state, brazil, receives domestic and industrial residues. the aim of this work was to present the richness of amphipleuraceae at the upper cambé river basin with some morphological information of the species. sampling was sazonal including november 2001, february, may and september 2002. the identified species were: amphipleura lindheimeri kützing, frustulia neomundana lange-bertalot & rumrich, f. pumilio rumrich & lange-bertalot, f. undosa metzeltin & lange-bertalot, f. vulgaris (thwaites) de toni, and f. weinholdii hustedt. three frustulia were not identified at species level.