GO 



THE ACTIXOMYCETES, Vol. I 



STRAIGHT 



FASCICLED 



OPEN LOOPS 

 PRIMITIVE SPIRALS 

 HOOKS 



SPIRALS 



mONOVERTICILLATE 

 NO SPIRALS 



mONOVERTICILLATE 

 WITH SPIRALS 



BIVERTICILLATE 

 NO SPIRALS 



► BIVERTICILLATE 

 WITH SPIRALS 



Figure 28. Suggested evolutionary development of the sporophore structure in the genus Strepto- 

 uijjces (Reproduced from: Pridham, T. G. et al. Appl. Microbiol. 6: 54, 195Sj. 



cation proposed for the order Actiiiomy- 

 cetales by Buchanan. He divided it into two 

 families: Adinomycetaceae, with four genera, 

 Adinomijces, Proadinomyces, Mycobacte- 

 rium, and M ycococcus; and Micromono- 

 sporaceae, with one genus Micromonospora. 

 Later, he suggested (1941, 1949) division of 

 the actinomycetes into three faniiHes: Adi- 

 nomycetaceae, with two genera, Actinomyces. 

 and Proadinomyces^; Micromonosporaceae, 

 with one genus, Micromonospora; and Myco- 



hadcriaceae, with two genera, Mycohade- 

 rinm and M ycococcus. 



In 1940, Waksnian and Unihreit, and later 

 Waksinan, proposed the following system of 

 classification of the Actinomycetales: 



A. Mycelium ludiineiitary or al)sent : Family 



M ycobacteiiaceae Chester. 

 I. Acid-fast organisms: M ycolxwleriiDii L & N 

 II. Nonacid-fast organisms: ('orynchartcriuni 

 L & N 



B. Mycelium produced : 



I. Substrate mycelium divides by segmenta- 



