Unlike the temnospondyls, these early amniotes were free to reproduce far from the water, by laying eggs with protective shells, which were probably more leathery than mineralized.

与穿椎不同， 这些早期的羊膜水的地方自由繁殖，它们产下带有保护壳的卵，这些卵能比矿化的更坚韧。