But there's also, parareptilia, or " side reptiles." These are some of the earliest reptiles, all of which are now extinct — like the spiky-cheeked procolophonids and the mesosaurs, which were probably the first aquatic reptiles.

但也有副爬行动物， 或“副爬行动物” 。 这些是一些最早的爬行动物，现在都已经灭绝了——比如尖颊的前角龙和中龙，它们可能是最早的水生爬行动物。