Barbaridactylus is a large nyctosaurid, with a humerus length of 22.5 cm (8.9 in), wingspan of approximately 4 m (13 ft) and a body mass of 4 kg (8.8 lb).[1][3][a] Like other nyctosaurids, Barbaridactylus had upward-curving jaws. The only known cervical is also rather typical for nyctosaurids, as it is proportionately short and broad, a morphology also present in the related pteranodontids. The scapulocoracoid is fused, meaning that the animal was probably an adult. It is boomerang shaped, and the two bones (the scapula and coracoid) form a 60 degree angle. The humeral shaft is long and thin. The hatchet-shaped deltopectoral crest (a distinctive feature of nyctosaurids) is in a notably distal location in relation to the humeral head, more similar to that of Nyctosaurus than Alcione. This crest is short and broad, and the expanded tip is weakly developed, which are basal features. The deltopectoral crest appears warped from an anterior view, more so than in other nyctosaurids, but much less than in pteranodontids. There is a pneumatic fossa located on the ventral surface of each humeral head that is unique to this species. The ulna is relatively gracile, unlike the robust ulna of Alcione, and its ends are weakly expanded. The diameter radius is approximately two thirds that of the ulna. The femur of Barbaridactylus is relatively typical for a nyctosaurid, although it lacks the strong distal expansion present in other nyctosaurids. Instead, it expands more gently, similar to that of Pteranodon.
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