Fontimonas thermophila gen. nov., sp. nov., a moderately thermophilic bacterium isolated from a freshwater hot spring, and proposal of Solimonadaceae fam. nov. to replace Sinobacteraceae Zhou et al. 2008

Abstract

A novel bacterial strain designated HA-01T was isolated from a freshwater terrestrial hot spring located at Hot Springs National Park, Arkansas, USA. Cells were Gram-negative-staining, rod-shaped, aerobic, chemo-organotrophic, oxidase- and catalase-positive, non-spore-forming and motile by means of a single polar flagellum. Growth occurred at 37–60 °C, with an optimum between 45 and 50 °C, and at pH 6.5–8.5, with an optimum between pH 6.5 and 7.0. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the closest relatives of strain HA-01T were Solimonas aquatica NAA-16T (93.8 %), Solimonas flava CW-KD 4T (94.1 %), Solimonas soli DCY12T (93.1 %), Solimonas variicoloris MN28T (94.0 %), Nevskia ramosa Soe1T (91.2 %) and Hydrocarboniphaga effusa AP103T (91.1 %). Major fatty acids consisted of C16 : 0, iso-C16 : 0, C16 : 1ω5c and summed feature 8 (C18 : 1ω9c, C18 : 1ω7c and C18 : 1ω6c). Polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine, and the major isoprenoid quinone was Q-8. The DNA G+C content was 64.4 mol%. Based on phylogenetic, phenotypic and chemotaxonomic evidence, it is proposed that strain HA-01T represents a novel species in a new genus for which the name Fontimonas thermophila gen. nov., sp. nov. is proposed. The type strain of the type species is HA-01T ( = DSM 23609T = CCUG 59713T). A new family, Solimonadaceae fam. nov., is also proposed to replace Sinobacteriaceae Zhou et al. 2008.

The nomenclatural type of the genus Methanocorpusculum Zellner et al. 1988 and the selection of the correct name

“…This issue arises at regular intervals in both the incorrect interpretation (Asakawa & Nagaoka, 2003;Chong & Boone, 2001;Lindström & Young, 2011;Losey et al, 2013;Oren & Garrity, 2015;Whitman et al, 2015) and in the interpretation consistent with the wording of the Code (Tindall, 2008(Tindall, , 2014a(Tindall, , b, 2015b. It should however, be remembered that by allowing a nomenclatural type that is treated as a later heterotypic synonym to remain the nomenclatural type serves an important role central to Principle 1, 'to aim at the stability of names.…”

Response to Tindall (2014) on the legitimacy of the names Solimonadaceae Losey et al. 2013, Xanthomonadaceae Saddler and Bradbury 2005 and Xanthomonadales Saddler and Bradbury 2005

“…This resulted in the valid publication of the new combination Solimonas flava and emendation of the genus Solimonas . Subsequently, Losey et al (2013) proposed that the genus Solimonas should be combined with other genera to form a new family Solimonadaceae (Losey et al , 2013). Tindall (2014) claimed on the basis of the revised Rule 15 (Garrity et al , 2011) that Losey et al (2013) should have considered the prior, validly published family name Sinobacteraceae .…”

“…Subsequently, Losey et al (2013) proposed that the genus Solimonas should be combined with other genera to form a new family Solimonadaceae (Losey et al , 2013). Tindall (2014) claimed on the basis of the revised Rule 15 (Garrity et al , 2011) that Losey et al (2013) should have considered the prior, validly published family name Sinobacteraceae . However, the revision of Rule 15 only states that, ‘the nomenclatural type … is that element of the taxon with which the name is permanently associated, whether as the correct name or as a later heterotypic synonym [underline added to illustrate revision]’, and has no bearing on this issue.…”

“…Under the taxonomy of Losey et al (2013), Sinobacteraceae is clearly illegitimate because it violates Rules 9 and 15. Rules 9 states that the name of a family is formed by adding the suffix – aceae to the name of the type genus.…”

Priority of the genus name Clostridium Prazmowski 1880 (Approved Lists 1980) vs Sarcina Goodsir 1842 (Approved Lists 1980) and the creation of the illegitimate combinations Clostridium maximum (Lindner 1888) Lawson and Rainey 2016 and Clostridium ventriculi (Goodsir 1842) Lawson and Rainey 2016 that may not be used

“…Similar problems have arisen in the recent past (see for example Losey et al, 2013;Whitman et al, 2015), and closer examination of the wording and infrastructure (i.e. the way different Rules are interlinked) of the Code highlights these problems (see also Tindall, 2014Tindall, , 2015.…”