I just developed more on my spikethumb characters, which are known as part of the Sky Blue Lake herd, where they lived until the Great Earthshake occured. The suppossed survivors, first consisting of a family of six, left to find the Great Valley. The father and mother of the children died, and the uncle took the role of guardian and they finally reached the Great Valley, just as the original inhabitants were coming back to it from the Mysterious Beyond in LBT 5.
It was not really Odon's wish but Guan's wish that brought their father back, and when they and the Great Valley dinosaurs were returning from the Great Lake, they meet more survivors of the Sky Blue Lake herd. Then there was word that more survivors are out lost in the Mysterious Beyond, either in small groups or with other herds to try and find the Great Valley.
Here are all the characters I have so far:
Spikefoot-Older brother to Odon and father to Guan, Goanna, and Donna
Odon-Younger brother to Odon as well as uncle and teacher to Guan, Goanna, and Donna
Guan-Only son to Spikefoot and eldest of the siblings
Goanna-Eldest daughter and middle-child of the siblings
Donna-Youngest child of Spikefoot
Thunder Tail-Father of Lightning and leader of the current arriving herd
Lightning Tail-Son of Thunder and child-hood friend of Guan