Original paper

Staurastrum multinodulosum (Desmidiaceae), a little-known plankter from a crater-lake in Lazio (Italy)

Coesel, Peter F.M. Alfinito


Of the biradiate desmid species Staurastrum multinodulosum Grönblad, originally described from Silesia, only a few, partly doubtful records are known. In Lago di Giulianello (Lazio, Italy) it appears to be a common, often abundant plankter. Its morphological characteristics are elucidated with the help of SEM pictures and the taxonomic delimitation with some morphologically much resembling species, among which Staurastrum nodulosum Grönblad and Staurastrum caledonense Hub.-Pest., is discussed.