Key points are not available for this paper at this time.
INTRODUCTION 276 Prokaryotic Phototrophs: Basic Diffe rences Between Cyanobacteria and the Green and Purple Bacteria 276 MAJOR CHARACTERISTICS OF THE GREEN AND PURPLE BACTERIA 277 Cytological and Biochemical Properties 277 Historical Basis of the Existing Classification 278 Legitimate Names of the Higher Taxa 279 GREEN BACTERIA (CHLOROBIINEAE) 280 Green and Brown Sulfur Bacteria (Chlorobiaceae) 280 Green-colored species ..... ...... ... ... ... ... ........ 280 Brown-colored species and consortiums 280 Filamentous Gliding Green Bacteria (Chloroflexaceae) 281 Thermophilic and mesophilic Chloroflexus 281 Planctonic Chloronema 282 PURPLE BACTERIA (RHODOSPIRILLINEAE) 282 Problems of Differentiation Between Purple Sulfur and Nonsulfur Bacteria 282 Purple Sulfur Bacteria (Chromatiaceae) 283 Criteria for determinative purposes 283 Poorly studied genera and species 284
Norbert Pfennig (Sat,) studied this question.