NOMKNTLATrHK AND (IKNKHAL SVSTi;.MS OK CLASSIFICATION 



63 



Figure 31. Tho genus StreptospordNiiium 



the basis for the two latest editions of 

 Bergcy's Manual, and which is becoming 

 generally accepted. 



Couch (1950-1955) suggested, on the basis 

 of formation of sporangiospores, the crea- 

 tion of a new family Actinoplanaceae with 

 two new genera, Actinoplancs and Strcpto- 

 sporangiiim. 



Waksman and C(jrke (195o) proposed to 

 reintroduce the generic name Thermoactino- 

 mijccs, with type species T. vulgari.'< Tsik- 

 linsky, to include the thermophilic forms. 

 The organisms included in this genus are 

 similar in some respects (production of single 

 conidia) to Micromo7iospora, and in others 

 (production of aerial mycelium) to Strcpto- 

 m)/cf'S. Three species were included in this 

 genus: T. vulgaris, T. monosporus, and T. 

 thalpophilus. 



H. and M. Lechevalier proposed (1957) 

 the creation of a genus Waksmania, with a 

 type species W. rosea, on the basis of forma- 

 tion of double spores. They suggested clas- 

 sification of the Strcptomycetaceae as follows: 



I. Aerial myceliimi formed: 



1. Spores formed singly (not in chains). 



Tb erm oactinom yces 



2. Spores formed in pairs. 



Wahsmania 

 8. Spores formed in chains. 



Streptomyces 



II. Aerial mycelium not formed. 



1. Spores formed singly (not in chains). 



Micromonospora 



By a most peculiar coincidence, virtually 



simultaneously, a similar organism was 



described and published in Japan, by 



Xonomura and Ohara (1957), under the 



