Systematics of Denis, 1948 (Collembola, Seirinae) reveals a new position for the species within Seirinae.

Denis, 1948, is examined and redescribed based on syntypes and by a newly discovered Chinese population. Lectotype and paralectotypes were designated, and the type locality of the species has been fixed to Câuda, near Nhatrang, Vietnam. The species was first described in the genus , but based on morphological and molecular evidence it is here transferred to . For the phylogenetic placement of , its mitogenome was included in a dataset comprising 19 species of Seirinae. Maximum Likelihood and Bayesian inferences clustered the species next to Godeiro & Cipola, 2020 from Cambodia, forming a distinct clade from the Old World, confirming the hypothesis of the existence of a different basal lineage of Seirinae in Southern Asia.