Double Hyphalosaurii from the Liaoning Province, China

[Psittacosaurus]

Here are my two Hyphalosaurii lingyuanensis from the Yixian Formation in Liaoning, China, dating about 122 million years ago in the early Cretaceous. The plate is from an old museum collection, and some of the dark spots on it are old glue that turned brown. The Hyphalosaurus on the left measures around 40 cm in length, and the one on the right measures about 60 cm. 

 

One of the most common Chinese vertebrate fossils would be that of the Lycoptera, a cretaceous fish also from the Liaoning Province. It is believed that the Hyphalosaurus' main diet would be Lycopterae.

 

Hyphalosaurus was believed to be viviparous (giving birth to live kids without eggs) but then they realized that they were ovoviviparous, meaning that the eggs would hatch within the mother's body and their thin egg shells would be "pooped" out once the mom passes away. That's why scientists found teeny shell remains near a Hyphalosaurus fossil (it always amazes me how they can identify these as shells despite it being so little and fragmented).

 

Also, has anyone ever seen a picture of a polycephalic reptile? This is the same species as that one.