Division of the genus Chryseobacterium: Observation of discontinuities in amino acid identity values, a possible consequence of major extinction events, guides transfer of nine species to the genus Epilithonimonas, eleven species to the genus Kaistella, and three species to the genus Halpernia gen. nov., with description of Kaistella daneshvariae sp. nov. and Epilithonimonas vandammei sp. nov. derived from clinical specimens

• Published in: International Journal of Systematic and Evolutionary Microbiology
• Main Authors: Nicholson, Ainsley, C, Gulvik, Christopher, A, Whitney, Anne, M, Humrighouse, Ben, W, Bell, Melissa, E, Holmes, Barry, Steigerwalt, Arnie, G, Villarma, Aaron, Sheth, Mili, Batra, Dhwani, Rowe, Lori, A, Burroughs, Mark, Pryor, Jessica, C, Bernardet, Jean-François, Hugo, Celia, Kämpfer, Peter, Newman, Jeffrey, D, Mcquiston, John, R
• Other Authors: Centers for Disease Control and Prevention Atlanta (CDC), Centers for Disease Control and Prevention, Health Protection Agency, Virologie et Immunologie Moléculaires (VIM (UR 0892)), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of the Free State South Africa (UFS), Justus-Liebig-Universität Gießen = Justus Liebig University (JLU), Lycoming College, Advanced Molecular Detection (AMD) initiative., Lycoming College Professional Development Grants, NSF Grants 0960114 and 1248096, Fulbright Grant from the US State Department., INRAE
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: Chryseobacterium; extinction; genus delineation; taxonomy; [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology; Antarc*
• Online Access: https://hal.inrae.fr/hal-03319338; https://hal.inrae.fr/hal-03319338/document; https://hal.inrae.fr/hal-03319338/file/2020_Nicholson_ijsem.pdf; https://doi.org/10.1099/ijsem.0.003935

International audience The genus Chryseobacterium in the family Weeksellaceae is known to be polyphyletic. Amino acid identity (AAI) values were calculated from whole-genome sequences of species of the genus Chryseobacterium, and their distribution was found to be multi-modal. These naturally-occurring non-continuities were leveraged to standardise genus assignment of these species. We speculate that this multi-modal distribution is a consequence of loss of biodiversity during major extinction events, leading to the concept that a bacterial genus corresponds to a set of species that diversified since the Permian extinction. Transfer of nine species ( Chryseobacterium arachidiradicis , Chryseobacterium bovis, Chryseobacterium caeni, Chryseobacterium hispanicum, Chryseobacterium hominis, Chryseobacterium hungaricum,, Chryseobacterium pallidum and Chryseobacterium zeae ) to the genus Epilithonimonas and eleven ( Chryseobacterium anthropi , Chryseobacterium antarcticum , Chryseobacterium carnis , Chryseobacterium chaponense , Chryseobacterium haifense, Chryseobacterium jeonii, Chryseobacterium montanum , Chryseobacterium palustre , Chryseobacterium solincola , Chryseobacterium treverense and Chryseobacterium yonginense ) to the genus Kaistella is proposed. Two novel species are described: Kaistella daneshvariae sp. nov. and Epilithonimonas vandammei sp. nov. Evidence is presented to support the assignment of Planobacterium taklimakanense to a genus apart from Chryseobacterium, to which Planobacterium salipaludis comb nov. also belongs. The novel genus Halpernia is proposed, to contain the type species Halpernia frigidisoli comb. nov., along with Halpernia humi comb. nov., and Halpernia marina comb. nov.