Liuixalus calcarius

Liuixalus calcarius, the limestone small tree frog, is a species of frog in the family Rhacophoridae. It is endemic to Vietnam, where it was found in Hai Phong Province. It lives in tropical primary forest habitats rich in karst rock.

The skin of the dorsum is red-brown in color with an X-shaped mark on the shoulder. This frog has disks on its toes for climbing. The pupil of the eye is horizontal.

Scientists named this frog calcarius for the Latin language word for "limestone." The frog's habitat is rich in karst rock.