Tupuxuara longicristatus
- Rodrigo
- Mar 19
- 2 min read
Age
Cretaceous（Albian）
112 Ma
Taxonomy
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Pterosauria
Family: Thalassodromidae
Genus: Tupuxuara
Species: Tupuxuara longicristatus
Morphological description
Tupuxuara longicristatus is a pterosaur established from fossils of the Early Cretaceous Santana Formation in Brazil. Its holotype consists of a fragmentary rostrum (MN 6591-V). Although incomplete, the specimen preserves a key diagnostic feature: a posteriorly sweeping bony cranial crest extending from the frontal region toward the rear of the skull, forming one of its most distinctive anatomical traits. The rostrum is elongate and slender, and the complete absence of teeth indicates that it belongs to a typical edentulous pterosaur lineage.
The nasoantorbital fenestra is exceptionally large, occupying a substantial portion of the anterior skull. Comparative material suggests that the skull of this species was elongate in proportion. Its cranial crest differs markedly from that of closely related taxa such as Tupuxuara leonardii: in T. longicristatus, the rostrum is more slender, and the crest originates closer to the anterior portion of the snout before extending posteriorly across the skull, forming a pronounced backward-curving profile.
Etymology
The genus name Tupuxuara was established in 1988 by Brazilian paleontologists Alexander Wilhelm Antonio Kellner and Dionísio de Almeida Campos. The name is derived from the Tupi language, an indigenous language of Brazil, and can be interpreted as "the breath of an evil spirit" or "the voice of an evil spirit". This mythologically inspired name reflects both local cultural context and the unusual cranial crest of the animal.
The species name longicristatus originates from Latin: longus meaning "long" and cristatus meaning "crested", referring to its most prominent feature—a long, posteriorly directed cranial crest.
Biological description
Ecologically, Tupuxuara longicristatus belongs to the azhdarchoid clade within Thalassodromidae. Members of this group are interpreted as relatively large pterosaurs with the capacity for both efficient soaring and active flight. Their anatomical structure suggests that they were also capable of terrestrial locomotion.
The absence of teeth, combined with an elongated rostrum, has led to the hypothesis that their feeding strategy may have resembled that of modern wading birds. Rather than grasping prey with teeth, they likely relied on picking or seizing food items such as fish, small vertebrates, and invertebrates.
The posteriorly extended cranial crest may have played a role in visual display or social signaling, potentially varying with age or sex. The Santana Formation represents a coastal lagoon–deltaic environment, suggesting that this species inhabited shoreline ecosystems where aquatic and terrestrial resources intersected.
Although some researchers have proposed that variation within Tupuxuara could be attributed to growth stages or preservation differences, later analyses by Kellner and Campos support the interpretation that T. longicristatus is morphologically distinct from other species within the genus, reinforcing its validity as an independent taxon.
（Author: Rodrigo）
References
Kellner, A. W. A., & Campos, D. A. (1988). Sobre um novo pterossauro com crista sagital da Bacia do Araripe, Cretáceo Inferior do Nordeste do Brasil. Anais da Academia Brasileira de Ciências, 60(4), 459–469.
Witton, M. P. (2009). A new species of Tupuxuara (Thalassodromidae, Azhdarchoidea) from the Lower Cretaceous Santana Formation of Brazil, with a note on the nomenclature of Thalassodromidae. Cretaceous Research, 30(5), 1293–1300. https://doi.org/10.1016/j.cretres.2009.07.006
-7.2, -39.3
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