a species of unusual reptiles in the order Squamata. It was relatively primitive compared to the other lizard lineages of its time but is considered a basal lizard, probably related to the early Iguania or Gekkota. Yabeinosaurus was one of many viviparous lizards; one specimen was preserved with 15 embryos, close to birth, in her body. It is known from several well-preserved juvenile and adult specimens, the largest about 1.5 feet long. China, Early Cretaceous, 125–122 Ma.