The survey of Pinnulariaceae was based on 29 planktonic and periphytic samples collected at six stations in the Guaraguaçu River. The qualitative analysis of samples allowed the identification of 36 species, 14 varieties and one taxonomic form: Caloneis bacillum, C. hyalina, C. formosa, C. westii, Pinnularia acoricola, P. acrosphaeria, P. acrosphaeria f. minor, P. acuminata var. acuminata, P. acuminata var. novazealandica, P. borealis var. rectangularis, P. brauniana, P. butantanum, P. decrescens var. ignorata, P. divergens var. biconstricta, P. divergens var. divergens, P. divergens var. malayensis, P. divergens var. media, P. divergens var. mesoleptiformis, P. diversarea, P. dornii, P. gibba, P. graciloides var. latecapitata, P. grunowii, P. hartleyana var. curta, P. huckiae, P. hudsonii, P. hyalina, P. inconstans, P. latevittata, P. maculata, P. meriadiana var. parallela, P. michelcostei, P. microstauron, P. neomajor, P. nobilis var. regularis, P. oominensis, P. rhombarea, P. rostratissima var. parva, P. rumrichae, P. stidolphii, P. stoermeri, P. subcapitata, P. subgibba var. subgibba, P. subgibba var. undulata, P. sudetica, P. tabellaria, P. viridiformis, P. viridis, Pinnularia sp.1 and Pinnularia sp.2; 32 of these are new records for Parana state.
Caloneis; estuary; lotic system; Pinnularia; taxonomy
