ABSTRACT
Introduction ....................................................................................................................................663 Archaeal Genetics and Molecular Biology ....................................................................................664 Archaeal Membranes and Cell Walls ............................................................................................665 Archaeal Phylogeny .......................................................................................................................665 Phylum Crenarchaeota ................................................................................................................... 667
Hyperthermophilic and Thermophilic Crenarchaea: Thermoproteales, Sulfolobales, Desulfurcoccales, and Caldisphaerales ................................................................... 667
Mesophilic and Psychrophilic Crenarchaea: Cenarchaeales ..............................................668 Phylum Euryarchaeota ...................................................................................................................669
