Cynovenator

The Cynovenator split from the Shrew Lizard. The claw that was originally the knee-claw in Prosubigosaurus becomes longer and becomes a weapon, while the finger becomes an opposable thumb to grasp prey. It is not fully bipedal, as it walks on the claw as well. It is adapted to eat small animals such as the Eggsnapper and Star-Tongued Gulper, but it can also scavenge the corpses of larger animals such as the Mega Worm. The Cynovenator developed a long neck to reach deep into the giant cadavers. It doesn't attack Plenthers though, nor the Forest Roamer. It watches and waits for the Plenther to finish eating the kill, and when the Plenther leaves, the Cynovenator devours what's left of the corpse. Cynovenators who dwell near the Bone River attack Filterworms.

The eyes have improved. The small eyes can only sense movement, thus are mechanoreceptive. The posterior part of the jaw become more vibrosensitive, and become fluid-filled, thus improving hearing.

The males develop a new twin tube-like organ called the hemipenes, similar to Earth's reptiles. Females developed tall hair-like structures which the newborns grasp while they travel to the pouch.