Crossiella, a Rare Actinomycetota Genus, Abundant in the Environment

The genus Crossiella contains two species, C. equi, causing nocardioform placentitis in horses, and cryophila, an environmental bacterium. Apart from which is not discussed here, rarely reported the literature; thus, it has been included among “rare actinobacteria”, whose isolation frequency very low. After only five reports cover of strains. However, published papers on increased significantly recent years due to extensive use next-generation sequencing (NGS) a huge cascade data that improved our understanding how bacteria occur environment. In last years, found different environments (caves, soils, plant rhizospheres, building stones, etc.). high abundance cave moonmilk indicates this may have active role formation, as evidenced by precipitation calcite, witherite, struvite culture media. This review provides overview Crossiella, particularly caves, discusses its biomineralization processes bioactive compound production.