(Number 1)  May 2001 

G. R. Hasle  The marine, planktonic diatom family Thalassionemataceae: morphology, taxonomy and distribution (pp. 1-82);  M. Shiono Two new species of the Thalassiosira trifulta group in late Pliocene sediments of the Northwest Pacific Ocean (pp. 83-92);  H. Suzuki, J. Tanaka & T. Nagumo  Morphology of the marine diatom Cocconeis pseudomarginata Gregory var.intermedia Grunow (pp. 93-102);  H. Lange-Bertalot & P. Compère  Fragilaria subgen. Ulnaria, comb. nov., the correct name of the subgenus including Synedra ulna, when treated in Fragilaria (pp. 103-104);  F.E. Round How large is a river? The view from a diatom (pp. 105-108);  F.A.S. Sterrenburg  Transfer of Surirella patrimonii Sterrenburg to the genus Petrodictyon (pp. 109-111);  Obituary  Professor Iraida Makarova (1929-2000) (pp. 113-124);  N.A. Andresen & M.B. Edlund  Index to Diatom Research Volumes 1-14, 1986-1999 (pp. 125?246); Contents of Diatom Research (volumes 1-14).1986?1999 (pp. 247-258). 

(Number 2) November 2001 

L. K. Armand & U Zielinski Diatom species of the genus Rhizosolenia from Southern Ocean sediments: distribution and taxonomic notes (pp. 259-294 );  M. B. Edlund, N. A. Andresen & N. Soninkhishsig Morphology of Oestrupia zachariasii and its transfer to Biremis(pp. 295-306 );  M. Garcia Psammococconeis, a new genus of Bacillariophyta separate from Cocconeis Her., from Brazilian sandy beaches (pp. 307-316);  P. B. Hamilton & K. R. Laird Nitzschia pseudosinuata sp. nov., a new Holocene diatom from the sediments of Moon Lake, North Dakota, U.S.A. (pp. 317-324 );  M. K. Hein & B. M. Winsborough  Oestrupia grandis sp. nov., a new benthic marine diatom from the Bahamas (pp. 325-341);  B. Meyer, M. Wulf & H Håkansson  Phenotypic variation of life-cycle stages in clones of three similar Cyclotella species after induced auxospore production (pp. 343-361);  S. Servant-Vildary, E. Fourtanier, J. P. Kociolek, M. M. Macdonald & A. Miette  Nomenclatural issues, types and conserved material from Tempère and Peragallo’s Diatomées du Monde Entier, Edition 2 (pp. 363-398);  P. A. Sims The genus Praetriceratium gen. nov.: a survey of eupodiscoid genera with a sipho marginalis (pp. 399-416 );  A. A. Zalat  New araphid diatom species of the genus Trachysphenia Petit from recent coastal sediments of the eastern side of the Gulf of Suez, Egypt (pp. 417-432 );  Opinion: J. P. Kociolek & E. F. Stoermer  Taxonomy and Ecology: a marriage of necessity (pp. 433-442);  Obituary: Dr Márta Hajós (1916-2000) (pp. 443-447 ); Reviews (pp. 449-450).�