The inevitable break-up of the Australian legless lizard genera Delma Gray, 1831 and Aprasia Gray, 1839, formal descriptions of 13 well-defined Pygopodid species, as well as a further improvement in Pygopodid taxonomy and nomenclature. Australasian Journal of Herpetology, 35, Jul 20 2017: 3-32. 22 [Zoological Record Volume 154]