Waksman 



Actinomycetes 



nate a certain group of actinomycetes, characterized by a special man- 

 ner of sporulation, as will be described later. These forms are some- 

 what related to the genera Corynehacterimn and Mycohacterhwi. The 

 organisms belonging to the genus Proactinomyces were later included by 

 Lehmann and Haag in a separate family Proactinomycetaceae. This 

 group includes such important forms as A. hovjinis Wolf-Israel, Strepto- 

 thrix Israeli Kruse, A. farcinicus, and A. asteroides. The name No- 

 cardia, however, appears to deserve priority in designating this group of 

 actinomycetes. 



19. Micromonosfora Orskov (1923).— The generic name Micro- 

 wonos'pora was used to designate those actinomycetes that produce single 

 spores on side«branches. Streftothrix chalcea of Foulerton and A. 

 monosforus of Lehmann and Schutze belong to this group. 



^_ 



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Fig. 2.— First photograph of a species of Micromonospora (1899). This organ- 

 ism was a thermophiHc form growing in hot manure compost and called by 

 TsiKLiNSKY Thernioactinomyces vulgaris (429). 



20. Thermoactinovtyces Tsiklinsky (1899).— This name was first 

 used to designate thermophilic actinomycetes. Although one of the 

 forms included in this group is definitely a Micromonosfora, as shown in 

 Fig. 2, the fact that forms producing the long-chain type were also in- 

 cluded would preclude the use of TherinoacUnomyces as the generic 

 name. The separation of the thermophilic forms into a separate genus 

 is hardly justified, since organisms which definitely belong to several 

 different genera would be included. The temperature tolerance of cer- 

 tain types of actinomycetes is commonly used only for species separation 

 and not for separation of genera. 



21. Mycococcus Bokor (1930).— This name was first used to desig- 

 nate certain nocardia-like organisms (41). It was later applied by 

 Krassilnikov (234) to certain bacteria which appear to be related to 

 the actinomycetes. 



22. Asteroides Puntoni and Lconardi (1935).— This name was also 



