Bakiribu

Bakiribu () is an extinct genus of ctenochasmatid pterosaurs known from the Early Cretaceous (Aptian–Albian age) Romualdo Formation of Brazil. The genus contains a single species, Bakiribu waridza, known from the fragment remains of two individuals preserved in a regurgitalite. This indicates the pair may have been consumed by a spinosaurid theropod dinosaur. It represents the first member of the broader clade Archaeopterodactyloidea described from the Romualdo Formation. Bakiribu has a unique pattern of closely-packed comblike teeth in the upper and lower jaws that may have been used for filter feeding, similar to the closely related Pterodaustro.

== Discovery and naming == Several years prior to 2025, Aline M. Ghilardi and William B. S. Almeida discovered a calcareous concretion from the Romualdo Formation, part of the Araripe Basin, in northeastern Brazil in the collection of the Museu Câmara Cascudo. The concretion specimen had remained at the museum for several years without study; its exact provenance is unknown. The concretion style of preservation, with specimens preserved in a part and counterpart visible when the block is split open, is typical of material collected in this formation. The two specimen parts were accessioned as MCC1271.1-V and MCC1271.2-V at the Museu Câmara Cascudo (MCC), part of the Federal University of Rio Grande do Norte in Rio Grande do Norte, Brazil. It comprises the fragmented upper and lower jaws of two pterosaur individuals, as well as four associated fish, likely of the genus Tharrhias, with their heads pointing in the same direction.