A new species of the genus Boulenophrys (Anura, Megophryidae) from Guizhou, China

Based on morphological and molecular phylogenetic analyses, a new species of the genus Boulenophrys is described from Yezhong Nature Reserve, Shuicheng County, Guizhou Province, China. Phylogenetic analyses based on the mitochondrial genes 16 S rRNA and COI indicate that this new species represents an independent species-level lineage, closely related to B. fanjingmontis, B. qianbeiensis, B. sangzhiensis, and B. spinata.

The new species is distinguished from its congeners by a combination of the following characteristics: (1) body size moderate (SVL 41.2–46.2 mm in adult males and 51.8–58.6 mm in adult females); (2) a single small horn-like tubercle at the edge of each upper eyelid; (3) vomerine teeth absent; (4) tongue not notched posteriorly; (5) tympanum distinctly visible, round; (6) toes with rudimentary webbing and narrow lateral fringes; (7) heels overlapping when thighs are positioned at right angles to the body; (8) tibiotarsal articulation reaching the level of the middle of the eye when the leg is stretched forward; (9) a single internal subgular vocal sac in males; (10) in breeding males, the nuptial pads have black nuptial spines on the bases of the first and second fingers.