SIVER, Peter A., & Paul B. HAMILTON 2005 (May 5) Observations on new and rare species of freshwater diatoms from Cape Cod, Massachusetts, USA Canad. J. Bot. 83(4): 362-378, 80 figs. Neidium statuarium n. sp. and Stenopterobia pseudodelicatissima n. sp; Nupela vitiosa and Tryblionella scalaris n.c.