| Microcaldus | |
|---|---|
| Scientific classification   | |
| Domain: | Archaea | 
| Kingdom: | Nanobdellati | 
| Phylum: | Microcaldota Sakai et al. 2023 | 
| Class: | Microcaldia Sakai et al. 2023 | 
| Order: | Microcaldales Sakai et al. 2023 | 
| Family: | Microcaldaceae Sakai et al. 2023 | 
| Genus: | Microcaldus Sakai et al. 2023 | 
| Species: | M. variisymbioticus | 
| Binomial name | |
| Microcaldus variisymbioticus Sakai et al. 2023 | |
Microcaldus is a monotypic genus of ultra-small archaea. It contains one species, Microcaldus variisymbioticus. It is in the monotypic family Microcaldaceae, monotypic order Microcaldales, monotypic class Microcaldia and monotypic phylum Microcaldota. [1] [2]