Phylogenetic relationships of 52 species based on COI sequences.

Coccidiosis is an important protozoan disease of domestic animals, which frequently presents as simultaneous infections with multiple species, however the relationships of species are not clear at present. In this study, we sequenced the COI of , , isolated from wintering feces, and also downed 49 species published in Genbank. The results indicated that no phylogenetic reconstruction supported monophyly of species, which is different from previous studies, dispersa may have arisen via host switching from another host.