1. Editorial

   • A.H. Stouthamer

   Legacy Pages: 1 - 1

2. Prokaryotic diversity and the importance of culturing

   • Norberto J. Palleroni

   OriginalPaper Pages: 3 - 19

3. Advances in soil microbial ecology and the biodiversity

   • Tsutomu Hattori
   • Hisayuki Mitsui
   • Reiko Hattori

   OriginalPaper Pages: 21 - 28

4. Verrucomicrobia div. nov., a new division of the Bacteria containing three new species of Prosthecobacter

   • Brian P. Hedlund
   • John J. Gosink
   • James T. Staley

   OriginalPaper Pages: 29 - 38

5. Non-cultivable microorganisms from symbiotic associations of insects and other hosts

   • Paul Baumann
   • Nancy A. Moran

   OriginalPaper Pages: 39 - 48

6. Protein phylogenies and signature sequences: evolutionary relationships within prokaryotes and between prokaryotes and eukaryotes

   • Radhey S. Gupta

   OriginalPaper Pages: 49 - 61

7. Eukaryotic molecular biodiversity: systematic approaches for the assessment of symbiotic associations

   • J.H.P. Hackstein

   OriginalPaper Pages: 63 - 76