What is the anatomical name of this design choice to have spikes

Claws, Jaws and Spikes: The Science of the Dinosaur Arsenal

What is the anatomical name of this design choice to have spikes on the back in paleoart? Which dinosaurs do we know had these and how do we know? : r/Dinosaurs

Anatomy of a Grasshopper and leg mechanism [7], [10].

E-Cannula reveals anatomical diversity in sharp-wave ripples as a

Spinal Anatomy Overview - Atlanta Brain and Spine Care

Is there any known ceratopsian with only one horn? : r/Paleontology

Non-differentiable spiking neural networks. (a) Different from

Medical illustration draws on knowledge of anatomy, cell biology

Just found out that there are more than 4 Spinosaurids (I only knew Spinosaurus, Baryonyx, Suchomimus, and Irritator) and some of them are nearly identical to the Spinosaurus/Baryonyx. Bro how am I gonna keep track of them if I wanna learn about them all