Spectririckettsia Castelli et al. 2019 Spectririckettsia Castelli et al. 2019 Spectririckettsia obscura Castelli et al. 2019 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Proteobacteria (sic) Garrity et al. 2021 Pseudomonadota corrig. Garrity et al. 2021 Alphaproteobacteriota (sic) Garrity et al. 2021 Alphaproteobacteria Garrity et al. 2006 Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980) emend. Dumler et al. 2001 Rickettsiaceae Pinkerton 1936 (Approved Lists 1980) emend. Dumler et al. 2001 Spectririckettsia Castelli et al. 2019 Rickettsiaceae Pinkerton 1936 (Approved Lists 1980) emend. Dumler et al. 2001 Orientia Tamura et al. 1995 Rickettsia da Rocha-Lima 1916 emend. Weiss and Moulder 1974 (Approved Lists 1980) Occidentia Mediannikov et al. 2017 Cryptoprodotis (sic) Ferrantini et al. 2009 Cryptoprodota corrig. Ferrantini et al. 2009 Arcanobacter (sic) Martijn et al. 2015 Arcanibacter corrig. Martijn et al. 2015 Trichorickettsia Vannini et al. 2014 Megaira (sic) Schrallhammer et al. 2013 emend. Lanzoni et al. 2019 Megaera corrig. Schrallhammer et al. 2013 emend. Lanzoni et al. 2019 Gigarickettsia (sic) Vannini et al. 2014 Gigantorickettsia corrig. Vannini et al. 2014 Phycorickettsia Yurchenko et al. 2018 Repentibacter corrig. Prokopchuk et al. 2019 Sneabacter (sic) Prokopchuk et al. 2019 Spectririckettsia obscura Castelli et al. 2019 Castelli M. Serra V. Senra M.V.X. Basuri C.K. Soares C.A.G. Fokin S.I. Modeo L. Petroni G. The Hidden World of Rickettsiales Symbionts: "Candidatus Spectririckettsia obscura," a Novel Bacterium Found in Brazilian and Indian Paramecium caudatum. 2019 77 3 748 758 Microbial Ecology Microb Ecol 0095-3628 1432-184X 10.1007/s00248-018-1243-8 30105505 Castelli M. Serra V. Senra M.V.X. Basuri C.K. Soares C.A.G. Fokin S.I. Modeo L. Petroni G. The Hidden World of Rickettsiales Symbionts: "Candidatus Spectririckettsia obscura," a Novel Bacterium Found in Brazilian and Indian Paramecium caudatum. 2019 77 3 748 758 Microbial Ecology Microb Ecol 0095-3628 1432-184X 10.1007/s00248-018-1243-8 30105505