>>50005189Possibly but not necessarily. That really just comes down to limb length which is pretty variable and using that as a major character is going to lead to problems.
Let's use a dinosaur example. pachycephalosaurus is closely related to triceratops, despite one being a fairly gracile looking biped and the other a super stocky obligate quadruped.
Likewise, the closest relatives of the sauropods (Brontosaurus, Brachiosaurus, etc.) were the theropods (Tyrannosaurus, Allosaurus, Velociraptor, etc.)
In fact, all dinosaurs seem to have evolved from a bipedal ancestor, hell this ancestor likely lived alongside bipedal crocodiles.
How many limbs you walk on isnt something hard to change. Even our closely related ape relatives spend a lot of their time on all fours