Artistic reconstruction of a female mekosuchine nesting in the swampy environments of the Murgon fossil site. Also shown is one of the abundant giant soft-shell turtles, Murgonomys braithwaitei, an archaic marsupial, Djarthia murgonensis, and an unnamed ancestral songbird. The clays that form the fossil deposit were accumulated in this ancient lake. Credit: Panades et al 2025 (generated with Gemini AI) The oldest known crocodile eggshells ever identified in Australia are giving UNSW researchers