<p>The Santana Group in Northeast Brazil has yielded a remarkable discovery: the first filter-feeding pterosaur from the tropics, named <i>Bakiribu waridza</i> gen. et sp. nov. This new taxon provides key insights into the evolutionary history and ecological diversity of Ctenochasmatidae, a clade known for its specialized feeding adaptations. <i>Bakiribu</i> exhibits extremely elongated jaws and dense, brush-like tooth rows, similar to <i>Pterodaustro</i> but distinct in tooth cross-section and spacing. Paleohistological analysis of the teeth revealed well-preserved dentine and pulp cavities. Phylogenetic analysis recovers <i>Bakiribu</i> as the sister taxon to <i>Pterodaustro</i>, forming a clade more closely related to <i>Ctenochasma</i> than to <i>Gegepterus</i>, which is reinterpreted as a non-ctenochasmatine. Regarding some specific traits such as tooth density, elongation, and count, <i>Bakiribu</i> is intermediate between <i>Ctenochasma</i> and <i>Pterodaustro</i>, thus partially bridging a key evolutionary gap within Ctenochasmatinae. Taphonomic features support the interpretation of the fossil assemblage as a regurgitalite. This discovery brings crucial data for understanding biogeographic dispersal and ecological specialization within Ctenochasmatinae during the Early Cretaceous, and offers rare evidence of predator-prey interactions in the Romualdo Formation paleoecosystem. Together, these findings further underscore the importance of the Araripe Basin as a window into the Early Cretaceous biodiversity.</p>