Lichenihabitantaceae
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| Lichenihabitantaceae | |
|---|---|
Scientific classification  | |
| Domain: | Bacteria |
| Kingdom: | Pseudomonadati |
| Phylum: | Pseudomonadota |
| Class: | Alphaproteobacteria |
| Order: | Hyphomicrobiales |
| Family: | Lichenihabitantaceae Noh et al. 2019 |
| Type genus | |
| Lichenihabitans | |
| Genera | |
Lichenihabitantaceae is a family of Gram-negative bacteria within the order Hyphomicrobiales (formerly Rhizobiales) in the class Alphaproteobacteria. The family was first proposed in 2019 to accommodate the genus Lichenihabitans, isolated from Antarctic lichens.[1]
The family Lichenihabitantaceae was validly published by Noh et al. in 2019 following the description of Lichenihabitans psoromatis.[1]
According to the List of Prokaryotic names with Standing in Nomenclature (LPSN), the family currently includes the genera:
The genus Lichenibacterium is presently classified in the separate family Lichenibacteriaceae according to LPSN,[3] although genome-based studies have suggested close phylogenetic relationships between these taxa.[4][5]
Description
Members of the family are Gram-negative, chemo-organotrophic bacteria typically isolated from lichen thalli.[1][2]
Cells are rod-shaped and may be motile or non-motile depending on the genus and growth stage. Colonies are typically pink to orange due to carotenoid-type pigments.[1][2]
Growth occurs at low to moderate temperatures (4–35 °C), reflecting adaptation to cold and temperate environments. Most species grow optimally in slightly acidic to neutral pH conditions and are sensitive to elevated NaCl concentrations.[1][2]
Metabolically, members utilize a broad range of carbohydrates and organic acids and are primarily aerobic. Nitrogen fixation and methylotrophic growth have not been demonstrated in the type species of Lichenihabitans.[1]