The modern thylacine probably appeared about 2 million years ago, during the Early Pleistocene. Specimens from the Pliocene-aged Chinchilla Fauna, described as "Thylacinus rostralis" by Charles De Vis in 1894, have in the past been suggested to represent "Thylacinus cynocephalus", but have been shown to either have been curatorial errors, or ambiguous in their specific attribution. The family Thylacinidae includes at least 12 species in eight genera, and appears around the late Oligocene with the small, plesiomorphic "Badjcinus turnbulli". Early thylacinids were quoll-sized, well under 10 kg (22 lb) and probably ate insects and small reptiles and mammals, although signs of an increasingly-carnivorous diet can be seen as early as the early Miocene in "Wabulacinus". Members of the genus "Thylacinus" are notable for a dramatic increase in both the expression of carnivorous dental traits and in size, with the largest species, "Thylacinus potens" and "Thylacinus megiriani" both approaching the size of a wolf. In Late Pleistocene and early Holocene times, the modern thylacine was widespread (although never numerous) throughout Australia and New Guinea.