 Crossiela is a genus of gram-positive bacteria that includes two species, C, equi and C, cryophila. C, equi is a pathogenic species that causes no-cardioform placentitis in horses, while C, cryophila is an environmental species that is rarely reported in the literature. Environmental crossiela has recently become more prevalent due to advances in next-generation sequencing technology, allowing for a better understanding of the distribution of these bacteria in various environments. Crossiela has been found in caves, soil, plant rhizospheres, building stones, and other locations. It has also been observed to be involved in biomineralization processes, such as the precipitation of calcium carbonate, calcium sulfate, and magnesium ammonium phosphate in various culture media. This article was authored by Tamara Martin-Poses, José Luis Gonzalez Pimentel, Valgerado, and others.