Questions for ‘Defining a dinosaur is now far harder’
![860_main_questions_dino.gif](https://www.snexplores.org/wp-content/uploads/2019/11/860_main_questions_dino.gif)
The dinosauromorph Teleocrater rhadinus had a skull depression that was once thought to be unique to dinosaurs.
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA" (BUENOS AIRES, ARGENTINA), ARTWORK BY GABRIEL LIO