''Rossellomorea'' is a genus of

Gram-Positive In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. The Gram stain is ...

or Gram-variable staining rod-shaped bacteria in the family ''

Bacillaceae Bacillaceae, from Latin "bacillus", meaning "little staff, wand", are a family of gram-positive, heterotrophic, rod-shaped bacteria that may produce endospores. Motile members of this family are characterized by peritrichous flagella. Some Baci ...

'' from the order ''

Bacillales Bacillales, from Latin "bacillus", meaning "little staff, wand", are an order (biology), order of Gram-positive bacteria, placed within the Bacillota. The ''Bacillales'' are the most productive order of the phylum ''Firmicutes''. Representative ...

.'' The type species of this genus is ''Rossellomorea aquimaris.'' Members of ''Rossellomorea'' are previously species belonging to ''

Bacillus ''Bacillus'', from Latin "bacillus", meaning "little staff, wand", is a genus of Gram-positive, rod-shaped bacteria, a member of the phylum ''Bacillota'', with 266 named species. The term is also used to describe the shape (rod) of other so-sh ...

'', a genus that has been recognized by the scientific community as displaying phylogenetic heterogeneity among its members. Multiple studies using comparative phylogenetic analyses have been published in an attempt to clarify the evolutionary relationships between ''Bacillus'' species, resulting in the establishment of numerous novel genera such as ''

Alkalihalobacillus ''Alkalihalobacillus'' is a genus of gram-positive or gram-variable rod-shaped bacteria in the family '' Bacillaceae'' from the order ''Bacillales''. The type species of this genus is '' Alkalihalobacillus alcalophilus.'' This genus comprises sp ...

'', ''

Brevibacillus ''Brevibacillus'' is a genus of Gram-positive bacteria in the family Brevibacillaceae. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnolo ...

Solibacillus ''Solibacillus'' is a genus of Gram positive, rod shaped, spore-forming bacteria. The first member of ''Solibacillus'' was first isolated in 1999, and was originally called ''Bacillus silvestris''. However, further studies on ''B. silvestris'' f ...

'', ''

Alicyclobacillus ''Alicyclobacillus'' is a genus of Gram-variable, rod-shaped, spore-forming bacteria. The bacteria are able to grow in acidic conditions, while the spores are able to survive typical pasteurization procedures. Overview ''Alicyclobacilli'' are ...

,'' ''

Virgibacillus ''Virgibacillus'' is a genus of Gram-positive, rod-shaped (bacillus) bacteria and a member of the phylum Bacillota. ''Virgibacillus'' species can be obligate aerobes (oxygen reliant), or facultative anaerobes and catalase enzyme positive. Under s ...

'' and ''

Evansella ''Evansella'' is a genus of Gram-positive bacteria, Gram-positive rod-shaped bacteria in the family ''Bacillaceae'' within the order ''Bacillales''. The type species for this genus is ''Evansella cellulosilytica.'' Members of ''Evansella'' was t ...

''. In addition, the genus ''Bacillus'' has been restricted to only include species closely related to ''

Bacillus subtilis ''Bacillus subtilis'' (), known also as the hay bacillus or grass bacillus, is a gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants, humans and marine sponges. As a member of the genus ''Bacill ...

'' and ''

Bacillus cereus ''Bacillus cereus'' is a Gram-positive bacteria, Gram-positive Bacillus, rod-shaped bacterium commonly found in soil, food, and marine sponges. The specific name, ''cereus'', meaning "waxy" in Latin, refers to the appearance of colonies grown o ...

.'' The name ''Rossellomorea'' was named after the Spanish microbiologist Professor Ramon Rossello-Móra, of the Universitat de les illes Balears, Spain, for his work on microbial diversity and systematics in diverse habitats and his contributions to these fields as editor of the journal of Systematic and Applied Microbiology. __TOC__

Biochemical characteristics and molecular signatures

Members of this genus are

aerobic Aerobic means "requiring air," in which "air" usually means oxygen. Aerobic may also refer to * Aerobic exercise, prolonged exercise of moderate intensity * Aerobics, a form of aerobic exercise * Aerobic respiration, the aerobic process of cellu ...

and found mainly in marine environments. All members can produce endospores are most are motile by means of a single polar flagellum or peritrichous flagella. Colonies are generally light-yellow in colour. Most species are catalase-positive and oxidase-negative. ''Rossellomorea'' can grow in temperatures ranging from 5 °C to 48 °C and generally also in the presence of 2–5% (w/v) NaCl. Most species are catalase-positive, oxidase-negative and moderately halophilic or halotolerant. Analyses of genome sequences from ''Rossellomorea'' species identified three

conserved signature indels Conserved signature inserts and deletions (CSIs) in protein sequences provide an important category of molecular markers for understanding phylogenetic relationships. CSIs, brought about by rare genetic changes, provide useful phylogenetic markers ...

(CSIs) for this genus in the proteins PBP1A family penicillin-binding protein, aminotransferase A and helicase-exonuclease AddAB subunit AddA, which in most cases are exclusively shared by either all or most members of this genus. These CSIs provide a reliable means to molecularly distinguish this genus from other ''Bacillaceae'' genera and bacteria.

Taxonomy

''Rossellomorea'', as of May 2021, contains a total of 5 species with validly published names. This genus was identified as a

monophyletic In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent co ...

clade and phylogenetically unrelated to other ''Bacillus'' species in studies examining the taxonomic relationships within ''Bacillus''. This branching pattern is also observed in the

Genome Taxonomy Database The Genome Taxonomy Database (GTDB) is an online database that maintains information on a proposed nomenclature of prokaryotes, following a phylogenomic approach based on a set of conserved single-copy proteins. In addition to resolving parap ...

(GTDB). A non-validly published species, "Bacillus haikouensis" is also found to group with other members of ''Rossellomorea'' in phylogenetic trees as well as share the same molecular markers in the form of

(CSIs). However, its transfer was not officially proposed due to the lack of culture strain information and further analysis should be conducted when additional information becomes available.

Phylogeny

* "''R. orangium''"

References

{{Taxonbar, from=Q107210961 Bacillaceae Gram-positive bacteria Bacteria genera