The Pseudonocardiaceae are a family of bacteria in the order
Actinomycetales The Actinomycetales is an order of Actinomycetota. A member of the order is often called an actinomycete. Actinomycetales are generally gram-positive and anaerobic and have mycelia in a filamentous and branching growth pattern. Some actinomycete ...
and the only member of the suborder Pseudonocardineae.


The species within the family Pseudonocardiaceae form a distinct clade in
phylogenetic tree A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological spe ...
s based on concatenated protein sequences. Additionally, ''Nakamurella multipartite'', currently part of the order
Frankia ''Frankia'' is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants, similar to the '' Rhizobium'' bacteria found in the root nodules of legumes in the family Fabaceae. ''Frankia'' also initiate the forming of ro ...
les, also formed a clade with the Pseudonocardiaceae species in 100% of the bootstrap replications of the phylogenetic trees. A conserved signature indel has been identified which is found in ''N. multipartite'' and all but one of the Pseudonocardiaceae species. This one-amino-acid insertion in UMP kinase serves to both provide a
molecular marker A molecular marker is a molecule, sampled from some source, that gives information about its source. For example, DNA is a molecular marker that gives information about the organism from which it was taken. For another example, some proteins can be ...
for nearly all of the Pseudonocardiaceae and suggests ''N. multipartite'' is closely related to this group. Some evidence also suggests the orders Pseudonocardiales and Corynebacteriales are closely related. Several conserved signature indels have been identified which are found in both Pseudonocardiales and Corynebacteriales, including a three-amino-acid insertion in a conserved region of UDP-galactopyranose mutase. This insertion is also present in ''N. multipartite'' and ''Geodermatophilus obscurus'', another member of Frankiales. Additionally, five conserved signature proteins have been identified which are found only in the orders Pseudonocardiales and Corynebacterialess. Homologs of the proteins are generally found in ''N. multipartite'' and ''G. obscurus'', providing additional evidence of these two species being closely related to the orders Pseudonocardiales and Corynebacteriales.


''Pseudonocardiaceae'' comprises the following genera: * '' Actinoalloteichus'' Tamura et al. 2000 * '' Actinocrispum'' Hatano et al. 2016 * '' Actinokineospora'' Hasegawa 1988 * '' Actinomycetospora'' Jiang et al. 2008 * '' Actinophytocola'' Indananda et al. 2010 * '' Actinopolyspora'' Gochnauer et al. 1975 (Approved Lists 1980) * '' Actinorectispora'' Quadri et al. 2016 * '' Actinosynnema'' Hasegawa et al. 1978 (Approved Lists 1980) * '' Allokutzneria'' Labeda and Kroppenstedt 2008 * '' Allosaccharopolyspora'' Teo et al. 2021 * '' Amycolatopsis'' Lechevalier et al. 1986 * '' Bounagaea'' Meklat et al. 2015 * '' Crossiella'' Labeda 2001 * '' Gandjariella'' Ningsih et al. 2019 * '' Goodfellowiella'' Labeda et al. 2008 * '' Haloactinomyces'' Lai et al. 2017 * '' Haloechinothrix'' Tang et al. 2010 * '' Halopolyspora'' Lai et al. 2014 * '' Halosaccharopolyspora'' Teo et al. 2021 * '' Herbihabitans'' Zhang et al. 2016 * '' Kibdelosporangium'' Shearer et al. 1986 * '' Kutzneria'' Stackebrandt et al. 1994 * '' Labedaea'' Lee 2012 * '' Lentzea'' Yassin et al. 1995 * '' Longimycelium'' Xia et al. 2013 * '' Prauserella'' Kim and Goodfellow 1999 * '' Pseudonocardia'' Henssen 1957 (Approved Lists 1980) * '' Qaidamihabitans'' Tian et al. 2022 * '' Saccharomonospora'' Nonomura and Ohara 1971 (Approved Lists 1980) * '' Saccharopolyspora'' Lacey and Goodfellow 1975 (Approved Lists 1980) * '' Saccharothrix'' Labeda et al. 1984 * '' Salinifilum'' Moshtaghi Nikou et al. 2017 * '' Sciscionella'' Tian et al. 2009 * '' Solihabitans'' Jin et al. 2022 * '' Streptoalloteichus'' (''ex'' Tomita et al. 1978) Tomita et al. 1987 * '' Tamaricihabitans'' Qin et al. 2015 * '' Thermocrispum'' Korn-Wendisch et al. 1995 * '' Thermotunica'' Wu et al. 2014 * '' Umezawaea'' Labeda and Kroppenstedt 2007


The currently accepted taxonomy is based on the
List of Prokaryotic names with Standing in Nomenclature List of Prokaryotic names with Standing in Nomenclature (LPSN) is an online database that maintains information on the naming and taxonomy of prokaryotes, following the taxonomy requirements and rulings of the International Code of Nomenclatu ...
(LPSN). The phylogeny is based on whole-genome analysis.



{{Taxonbar, from=Q7255180 Pseudonocardiales