... specimens of R. typus in relation to both phylogeny and ecology, using magnetic resonance imaging (MRI). In comparison to over 60 other chondrichthyan species, R. typus demonstrated a relatively small brain for its body size (expressed in terms of encephalization quotients and residuals), similar...

...). Allometry Ecomorphology Nervous system Cerebellum Morphometrics Neuromorphology Comparative brain morphology Chondrichthyan Batoid Batoids (electric rays, sawfishes, guitarfishes, skates and stingrays) and sharks comprise the subclass Elasmobranchii, an ancient and highly successful group...

...Kara E. Yopak; John C. Montgomery Chondrichthyans occupy a basal place in vertebrate evolution and offer a relatively unexplored opportunity to study the evolution of vertebrate brains. This study examines the brain morphology of 22 species of deep-sea sharks and holocephalans, in relation to both...

... Neuromorphology Comparative brain morphology Chondrichthyan Structural diversity can be used as a tool to understand brain function and evolution. Despite the basal position of chondrichthyans, or cartilaginous fishes, they have received less attention in this regard than other vertebrate classes...