● Feng GD,Wang DD,Yang SZ,Li HP,Zhu HH (2017). Genome-based reclassification of Sphingopyxis ummariensis as a later heterotypic synonym of Sphingopyxis terrae, with the descriptions of Sphingopyxis terrae subsp. terrae subsp. nov. and Sphingopyxis terrae subsp. ummariensis subsp. nov. Int. J. Syst. Evol. Microbiol..