Bakiribu, new filter-feeding pterosaur from Cretaceous of Brazil (free pdf)
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Ben Creisler
Nov 10, 2025, 10:53:30 AM (yesterday) Nov 10
to DinosaurMa...@googlegroups.com
Ben Creisler
A new paper:
Free pdf:
Bakiribu waridza gen. et sp. nov.
R. V. Pêgas, Tito Aureliano, Borja Holgado, William B. S. Almeida, Claude L. A. Santos & Aline M. Ghilardi (2025)
A regurgitalite reveals a new filter-feeding pterosaur from the Santana Group
Scientific Reports 15: 37336
doi: https://doi.org/10.1038/s41598-025-22983-3
https://www.nature.com/articles/s41598-025-22983-3
The Santana Group in Northeast Brazil has yielded a remarkable discovery: the first filter-feeding pterosaur from the tropics, named Bakiribu waridza 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. Bakiribu exhibits extremely elongated jaws and dense, brush-like tooth rows, similar to Pterodaustro but distinct in tooth cross-section and spacing. Paleohistological analysis of the teeth revealed well-preserved dentine and pulp cavities. Phylogenetic analysis recovers Bakiribu as the sister taxon to Pterodaustro, forming a clade more closely related to Ctenochasma than to Gegepterus, which is reinterpreted as a non-ctenochasmatine. Regarding some specific traits such as tooth density, elongation, and count, Bakiribu is intermediate between Ctenochasma and Pterodaustro, 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.
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Bakiribu waridza gen. et sp. nov.
R. V. Pêgas, Tito Aureliano, Borja Holgado, William B. S. Almeida, Claude L. A. Santos & Aline M. Ghilardi (2025)
A regurgitalite reveals a new filter-feeding pterosaur from the Santana Group
Scientific Reports 15: 37336
doi: https://doi.org/10.1038/s41598-025-22983-3
https://www.nature.com/articles/s41598-025-22983-3
The Santana Group in Northeast Brazil has yielded a remarkable discovery: the first filter-feeding pterosaur from the tropics, named Bakiribu waridza 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. Bakiribu exhibits extremely elongated jaws and dense, brush-like tooth rows, similar to Pterodaustro but distinct in tooth cross-section and spacing. Paleohistological analysis of the teeth revealed well-preserved dentine and pulp cavities. Phylogenetic analysis recovers Bakiribu as the sister taxon to Pterodaustro, forming a clade more closely related to Ctenochasma than to Gegepterus, which is reinterpreted as a non-ctenochasmatine. Regarding some specific traits such as tooth density, elongation, and count, Bakiribu is intermediate between Ctenochasma and Pterodaustro, 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.
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