A Long-Term Conservation Tool for Cell Characteristics: Cryopreservation of Paramecium caudatum
S. Krenek and T.U. Berendonk

Mitochondrial Group II Introns in the Raphidophycean Flagellate Chattonella spp. Suggest a Diatom-to-Chattonella Lateral Group II Intron Transfer
R. Kamikawa, I. Masuda, M. Demura, K. Oyama, S. Yoshimatsu, M. Kawachi and Y. Sako

Multigene Evidence for the Placement of a Heterotrophic Amoeboid Lineage Leukarachnion sp. among Photosynthetic Stramenopiles
J. Grant, Y.I. Tekle, O.R. Anderson, D.J. Patterson and L.A. Katz

Highly Differentiated Populations of the Freshwater Diatom Sellaphora capitata Suggest Limited Dispersal and Opportunities for Allopatric Speciation
K.M. Evans, V.A. Chepurnov, H.J. Sluiman, S.J. Thomas, B.M. Spears and D.G. Mann

Comparative Ecophysiology of the Xanthophyll Cycle in Six Marine Phytoplanktonic Species
C. Dimier, S. Giovanni, T. Ferdinando and C. Brunet

Phylogeny and Taxonomy of Xanthophyceae (Stramenopiles, Chromalveolata)
S. Maistro, P.A. Broady, C. Andreoli and E. Negrisolo

The System of Contractile Vacuoles in the Green Alga Mesostigma viride (Streptophyta)
K. Buchmann and B. Becker

High Plasticity in the Production of Diatom-derived Polyunsaturated Aldehydes under Nutrient Limitation: Physiological and Ecological Implications
F. Ribalet, C. Vidoudez, D. Cassin, G. Pohnert, A. Ianora, A. Miralto and R. Casotti

Helkesimastix marina n. sp. (Cercozoa: Sainouroidea superfam. n.) a Gliding Zooflagellate of Novel Ultrastructure and Unusual Ciliary Behaviour
T. Cavalier-Smith, R. Lewis, E.E. Chao, B. Oates and D. Bass