First report of infecting and sp. LF.

belongs to the Asian and is transmitted by freshwater snails of the genus . Rodents are known definitive hosts of . In 2016, suspected schistosome eggs were found in the feces of the northern tree shrew () in a field in Lufeng County (latitude, 25°04'50″ N; longitude, 102°19'30″ E; altitude 1820 m), Yunnan Province, China. Morphological analysis suggested that the schistosome was 18S, 12S and CO1 genes sequencing and phylogenetic analysis showed that this species had the highest similarity to and occupied the same evolutionary branch as from Mianzhu, Sichuan, China. Meanwhile, based on 16S and 28S rDNA sequencing and morphological identification, the snail intermediate host was identified as a species of , and was found in irrigation channels. Phylogeny indicated that sp. LF was a sister taxon to . The was able to experimentally infect the captive-bred and eggs were recovered from all exposed. In this study, we report the infection of and sp. LF with in Lufeng, Yunnan, southwest China. These findings may improve our understanding of the host range, evolution, distribution, and phylogenetic position of .