Aerial locomotion has been attributed to at least two drepanosaur genera: "Megalancosaurus" and "Hypuronector". The first was originally suggested by Ruben et al. 1998 on the basis of bird-like characters and limb proportions, but while not ruled out entirely they have since been largely dismissed, due to the animal's more clunky, chameleon-like anatomy. The latter, however, is much more likely a glider or flyer, due to the elongated forelimbs. Fossorial, or at least digging-related adaptations have been demonstrated in three drepanosaur genera: "Skybalonyx", "Ancistronychus", and "Drepanosaurus", the latter possibly being adapted to hook-and-pull digging, similar to modern-day anteaters and the former possessing claws similar in shape to modern-day moles and echidna, both of which are humeral-rotation diggers..