Wenupteryx uzi is a small pterodactyloid from the Late Jurassic Vaca Muerta Formation of Patagonia, Argentina. Its holotype, MOZ-PV 3625, preserves much of the postcranial skeleton, including parts of the shoulder, pelvis, wing and hindlimbs, but no skull. The bones place it among short-tailed pterodactyloids, correcting an older title that called it long-tailed. Its exact position within early pterodactyloids has shifted among analyses. The pterosaur catalogue records both the useful completeness of the skeleton and the parts that remain unknown.
Quick facts
| Name | Wenupteryx uzi Codorniú & Gasparini, 2013 |
|---|---|
| Group | Pterodactyloidea; narrower placement uncertain |
| Age | Late Jurassic, middle Tithonian |
| Place | Los Catutos, Neuquén Province, Patagonia, Argentina |
| Formation | Vaca Muerta Formation |
| Holotype | MOZ-PV 3625, partial postcranial skeleton |
| Skull | Not preserved in the holotype |
| Wingspan | Estimated at about 1 m; not a direct full-wing measurement |
What can the fossils tell us?
Several parts remain missing, and a separate larger ulna cannot be assigned to the holotype with certainty.
The old description's long-tailed label is not supported by the known skeleton; the exact branch within pterodactyloids remains debated.
The specimen does not provide an adult growth series or a secure maximum size for the species.
Discovery and naming
A partial pterosaur skeleton was found in 1987 in limestone of the Vaca Muerta Formation at Los Catutos, Neuquén Province, Argentina. The fossil was first mentioned as an indeterminate pterodactyloid and described in more detail before Laura Codorniú and Zulma Gasparini named Wenupteryx uzi in 2013. The name combines wenu, “sky” in Mapudungun, with the Greek pteryx, “wing”; uzi refers to speed.
The holotype is catalogued as MOZ-PV 3625. It is among the more informative Jurassic pterosaurs from the Southern Hemisphere because it preserves multiple regions of the body. It is not a complete skeleton: the skull is absent, several bones are incomplete, and the fossil does not preserve soft tissues.
What the holotype preserves
The material includes cervical and dorsal vertebrae, ribs, a substantial shoulder girdle, part of the pelvis, bones of the right wing and both hindlimbs, with the right foot missing. The preserved wing includes the humerus, radius and ulna, wrist elements, metacarpus and a phalanx of the elongated fourth finger. These bones document the basic pterodactyloid wing architecture.
A separate ulna, MOZ-PV 2280, was recovered from the same general region and belongs to a larger pterosaur. It is not part of the holotype and should not be combined with it to inflate the known size of Wenupteryx. Nearby finds can belong to different individuals or species unless their association is demonstrated.
Why it is not known as a long-tailed pterosaur
The 2013 description's title used the phrase “long-tailed pterosaur”, but the known anatomy and subsequent analyses place the species within Pterodactyloidea, the branch characterized by a shortened tail compared with earlier pterosaurs. The holotype does not preserve a complete tail. Its classification comes from the combination of postcranial features and phylogenetic comparison, not a long series of tail vertebrae.
Several analyses have placed it among early-diverging pterodactyloids, with affinities discussed near archaeopterodactyloids or ctenochasmatoids. The precise result can vary with the taxa and characters included. It is safest to say that Wenupteryx is a pterodactyloid while treating its narrower relationships as unresolved.
Wing proportions and growth
The preserved wing bones have been used to estimate a span of roughly one metre. That is a reconstruction from incomplete elements and comparisons, not a wingspan measured across an extended fossil. The missing wing parts, membrane and body proportions create uncertainty, and the value should not be treated as a precise adult maximum.
The pelvic bones are not fully fused, which indicates that the type individual had not completed skeletal maturity. This is one reason to avoid treating its estimated size as the definitive size of a fully grown animal. A single immature skeleton cannot reveal the whole growth curve or whether proportions changed substantially through development.
The missing head and diet
No skull or teeth are known for the holotype. A narrow toothed snout, a crest, or a particular beak shape cannot be attributed to Wenupteryx from direct evidence. Feeding ideas based on the marine setting or comparisons with related pterosaurs remain hypotheses rather than observations of this species.
The Vaca Muerta Formation formed in a marine basin and is famous for abundant ammonites and other marine fossils. A pterosaur could have foraged over water or near shore, and a carcass could also have entered the sea after death. Geological context alone cannot decide between those possibilities. No stomach contents, prey remains or feeding traces are associated with the type.
What the fossil contributes
Jurassic pterosaur remains are unevenly distributed, and South American material is relatively sparse. Wenupteryx adds a partial postcranial skeleton from Patagonia and demonstrates that early pterodactyloids occurred in the region by the Tithonian. It does not establish a migration route or explain where the group originated.
A reconstruction can confidently use the preserved shoulder, wing and leg proportions at a broad level, while the exact skull, skin covering, colour and behaviour remain uncertain. Its most useful contribution is the anatomy actually present, coupled with a classification that is more careful than the obsolete “long-tailed” shorthand.
Frequently asked questions
Was Wenupteryx long-tailed?
It is classified as a pterodactyloid with a shortened tail; the old long-tailed label is not supported by its current placement.
Was its skull found?
No. The holotype is a postcranial skeleton without a skull or teeth.
How large was it?
A wingspan around one metre has been estimated, but the type was immature and the span is reconstructed from incomplete bones.
What did Wenupteryx eat?
Its diet is unknown. The marine formation provides environmental context but no direct evidence of a meal.