 Morphological evidence generally points to a close relationship between "Rhina", "Rhynchobatus" and "Rhynchorhina", which are a group of rays known as the wedgefishes that also have large, shark-like fins.Morphological analyses have tended to place these two genera basally among rays, though some have them as basal to just the guitarfishes (Rhinobatidae) and skates (Rajidae) while others have them basal to all other rays except sawfishes (Pristidae).A 2012 study based on mitochondrial DNA upheld "Rhina" and "Rhynchobatus" as sister taxa related to the guitarfishes, but also unexpectedly found that they formed a clade with the sawfishes rather than the skates.