At around 55 million years old, Kambara fossils are among the oldest Tertiary (there are some recent Cretaceous fossils that are twice that age) found in Australia. Kambara is an Aboriginal term meaning "crocodile".
There are currently 3 species of Kambara described, K. murgonensis (Willis & Molnar, 1993), K. implexidens (Salisbury & Willis, 1996) and K. molnari (Holt et al., 2005). All three are of generalised crocodylian body plan, growing to sizes similar to the modern Saltwater Crocodile, Crocodylus porosus. This genus shows an interesting characteristic of having multiple bite patterns within the same genus. Kambara murgonensis has a near complete overbite, K. implexidens a more interlocking dentition and K. molnarai an intermediate condition. While initially thought to be the most primitive member of an Australasian radiation of crocodylains (Mekosuchinae), recent studies (Holt, et al., 2007) have suggested that this may not be the case, and that there are at least two separate lineages in Australia.