Advenella is a genus in the phylum Pseudomonadota (Bacteria).
[1] The two members of the genus Tetrathiobacter were transferred to this genus, namely Tetrathiobacter kashmirensis and Tetrathiobacter mimigardefordensis.
The name Advenella derives from:Latin advena, a stranger, a foreigner; and ella, a diminutive; Advenella, then, means the little stranger, referring to the fact that the source of these unusual organisms is unknown.
[2] The genus contains four species (including basonyms and synonyms):[2]