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Pterodaustro guinazui

Teeth from the lower jaw of this Early Cretaceous pterosaur from Argentine show an extreme adaptation for filter feeding. The teeth are indeed modified into a thousand of baleen-like structures perfect for filtering plankton from the water. The skull is also very thin and upward curved making the aspect of this animal particularly peculiar. Pterodaustro is known from more than two hundreds individuals from every growth stages including an embryo inside the egg, making it one of the best known pterosaurs.


Pterodaustro guinazui


Bonaparte, 1970

Meaning of the generic name

Wing of the South


Skull length: , Wingspan: up to 2.5 m.


Hundreds of (including complete) skeletons, ranging from juveniles to adults, including an embryo inside an egg.

Age and Distribution

Lower Lagarcito Formation, Gigante Group (Early Cretaceous, Albian),  Loma del Pterodaustro, Sierra de las Quijadas, San Luis Province, Argentina.


Pterosauria Pterodactyloidea Ctenochasmatoidea Ctenochasmatidae Ctenochasmatinae

  Further Reading

  Bonaparte, J. F., 1970, Pterodaustro guinazui gen. et sp. nov. Universidad Nacional de Tucuman fundacion e Instituto Miguel Lillo: Acta Geologica Lillonana, tomo 10, p. 210-225.
Codorniu´ , L. & Chiappe, L. M. 2004 Early juvenile pterosaurs (Pterodactyloidea: Pterodaustro guinazui ) from the Lower Cretaceous of central Argentina. Can. J. Earth Sci. 41, 9–18.


Illustration by N. Tamura

Skull of Pterodaustro guinazui (UNSL.GEO-V57) from Chiappe et al., 1998. Scale bar is 50 mm.