Paleoart of Megazostrodon, a sort of mammaliaforme related to, but just outside, true mammals. Despite not being a mammal, the group as a whole was already lactating! That being said, much like the platypus, the animal produced soft-shelled eggs. In addition, unlike most synapsids before, its jawbones were migrated upwards and were incorporated into the ear. Likely a nocturnal creature, these mammals and mammal-like creatures must have used their senses of smell and touch to get around. This is also likely what prevents most modern mammals from developing good color vision. Litargosuchus was one of the Mesozoic's vast array of land crocodylomorphs. Ever since the clade first evolved, there has almost always been some sort of terrestrial crocodile! This held true all the way up until Quinkana 10,000 years ago, so our current existence full of solely water crocodiles is a bit of a unique spot in Earth's history. Litargosuchus is unique for having extremely long legs, which it of course likely used to outrun predators and prey alike.
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