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Scientific classification
Domain: Bacteria
Phylum: Actinobacteria
Class: Actinobacteria Stackebrant et al. 1997
Subclass: Actinobacteridae
Stackebrandt et al. 1997 emend. Zhi et al. 2009
Order: Actinomycetales
Buchanan 1917 emend. Zhi et al. 2009
Suborder: Micromonosporineae
Stackebrandt et al. 1997 emend. Zhi et al. 2009
Family: Thermomonosporaceae
Rainey et al. 1997 emend. Zhang et al. 2001 emend. Zhi et al. 2009

Thermomonosporaceae represents a Family of bacteria that share similar genotypic and phenotypic characteristics. The Family Thermomonosporaceae[1] includes aerobic, Gram-positive, non-acid-fast, chemo-organotrophic actinobacteria. They produce a branched substrate mycelium bearing aerial hyphae that undergo differentiation into single or short chains of arthrospores. Thermomonosporaceae contains four genera, Thermomonospora, Actinomadura, Actinocorallia and Spirillospora.[2] All species of Thermomonosporaceae share the same cell wall type (type III; meso-diaminopimelic acid), a similar menaquinone profile in which MK-9(H6)is predominant, and fatty acid profile type 3a. The presence of the diagnostic sugar madurose is variable, but can be found in most species of this family. The polar lipid profiles are characterized as phospholipid type PI for most species of Thermomonospora, Actinomadura and Spirillospora. The members of Actinocorallia are characterized by phospholipid type PII.[2]

The G+C content of the DNA lies within the range 66±72 mol%.[2] The pattern of 16S rRNA signatures consists of nucleotides at positions 440 : 497 (C–G), 501 : 544 (C–G), 502 : 543 (G–C), 831 : 855 (G–G), 843 (U), 844 (A) and 1355 : 1367 (A–U).[3] The type genus is Thermomonospora[4]


  1. ^ Stackebrandt E, Rainey FA, Ward-Rainey NL (1997). "Proposal for a New Hierarchic Classification System, Actinobacteria classis nov.". Int. J. Syst. Evol. Microbiol. 47 (2): 479–491. doi:10.1099/00207713-47-2-479. 
  2. ^ a b c Zhang Z, Kudo T, Nakajima Y, Wang Y (2001). "Clarification of the relationship between the members of the family Thermomonosporaceae on the basis of 16S rDNA, 16S-23S rRNA internal transcribed spacer and 23S rDNA sequences and chemotaxonomic analyses". Int. J. Syst. Evol. Microbiol. 51 (Pt 2): 373–383. doi:10.1099/00207713-51-2-373. PMID 11321082. 
  3. ^ Zhi XY, Li WJ, Stackebrandt E (2009). "An update of the structure and 16S rRNA gene sequence-based definition of higher ranks of the class Actinobacteria, with the proposal of two new suborders and four new families and emended descriptions of the existing higher taxa". Int. J. Syst. Evol. Microbiol. 59 (Pt 3): 589–608. doi:10.1099/ijs.0.65780-0. PMID 19244447. 
  4. ^ Henssen A (1957). "Beitrage zur Morphologie und systematic der thermophilen actinomyceten". Arch. Mikrobiol. 26 (4): 373–414. doi:10.1007/BF00407588. PMID 13435805.