 The earliest known fossil remains of a lizard belong to the iguanian species "Tikiguania estesi", found in the Tiki Formation of India, which dates to the Carnian stage of the Triassic period, about 220 million years ago.However, doubt has been raised over the age of "Tikiguania" because it is almost indistinguishable from modern agamid lizards.The "Tikiguania" remains may instead be late Tertiary or Quaternary in age, having been washed into much older Triassic sediments.