Abstract
Leptanillinae, recognized as the most phylogenetically basal ant subfamily of Formicidae, comprises the genus Protanilla—the second most species-rich lineage within this subfamily. Protanilla species exhibit strong ecological specialization, being restricted to pristine primary forests where they inhabit subterranean environments or decayed wood. These ants are characterized by their completely vestigial eyes and extremely cryptic biology, which remains poorly understood. Globally, 20 valid species have been described, with half occurring in China, indicating this region represents the center of diversity for the genus. This study systematically reviewed the Chinese species of the Protanilla Taylor in Bolton, 1990, including two new species: P. xui sp. nov. and P. shanyii sp. nov., and provided an illustrated key to the worker caste of this genus in China.
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