These Cretaceous pterosaurs evolved a unique bottom-decker wing design to navigate ancient forests

Nature · Published 3 October 2026 Swipe more like this →

In short: Tapejarids were small to medium-sized pterosaurs defined by their parrot-like beaks and striking cranial crests. Unlike their relatives, these creatures possessed low-slung shoulder girdles, giving them a distinct wing arrangement similar to certain aircraft. Evidence suggests they were likely arboreal, relying on exceptional vision to hunt and interact.

Tapejaridae, a name derived from a Tupi term for a master of paths, represents a family of azhdarchoid pterosaurs that thrived during the Cretaceous period. While their remains have been identified across Africa, Asia, Europe, and South America, their evolutionary roots appear to be Asian, as the most primitive examples were discovered in China. These animals were physically distinct, characterized by a large opening in the skull known as a nasoantorbital fenestra and small, pear-shaped eye sockets that housed highly developed visual systems.

The lifestyle of these pterosaurs remains a subject of intense study. Their curved claws and frequent presence in fossil sites alongside early birds suggest an arboreal existence. While their beaks have long sparked debate regarding their diet, direct evidence of plant consumption exists; a specimen of Sinopterus was found containing phytoliths and gastroliths within its abdominal cavity, supporting the theory that they were at least partially herbivorous or omnivorous.

The classification of these animals is a complex, evolving field. Alexander Kellner first defined the family in 1989, but subsequent researchers have proposed radically different models. Some, like David Unwin in 2003, argued that certain genera traditionally placed within the family actually belong closer to the Azhdarchidae. This has led to a series of competing definitions, with modern paleontologists like Rodrigo Pêgas and Brian Andres continuously refining the family tree. These debates highlight the difficulty of mapping ancient lineages, as scientists weigh naming priorities against emerging phylogenetic data.

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