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Tapejarid (Pterosauria) postcranial elements from Araripe Basin, Brazil



From: Ben Creisler
bcreisler@gmail.com

A new online paper:

Alex S. S. Aires, Alexander W. A. Kellner, Rodrigo T. Müller, Lúcio R.
Da Silva, Cristian P. Pacheco & Sérgio Dias-Da-Silva (2013)
New postcranial elements of the Thalassodrominae (Pterodactyloidea,
Tapejaridae) from the Romualdo Formation (Aptian–Albian), Santana
Group, Araripe Basin, Brazil.
Palaeontology (advance online publication)
DOI: 10.1111/pala.12069
http://onlinelibrary.wiley.com/doi/10.1111/pala.12069/abstract



Tapejarids are edentate pterosaurs recovered mainly from Early
Cretaceous deposits. They are diagnosed by five synapomorphies, among
which only one is postcranial: a broad and well-developed tubercle at
the ventroposterior margin of the coracoid. Regarding the clade
Thalassodrominae, most phylogenetic studies are based on cranial
elements, as postcranial skeletons of these pterosaurs are rare. Here,
new postcranial material from the Romualdo Formation (Aptian–Albian)
from the Araripe Basin is described. The material comprises the three
posteriormost cervical vertebrae, the first seven dorsal vertebrae
(fused into a notarium), both scapulocoracoids, a fragment of a
sternum, a partial right humerus, a small fragment of a 4th phalanx of
the wing finger, a distal extremity of the right femur and the
proximal portions of both tibia and fibula. Comparisons with other
specimens and morphological features examined in a phylogenetic
context, such as the presence of three foramina lateral and dorsal to
the neural canal of the cervical vertebrae, the presence of a notarium
and a pneumatic foramen on the ventral side of the proximal portion of
the humerus, allow the assignment of this specimen as Thalassodrominae
indet. Regarding palaeobiogeographical aspects, to date, this clade is
exclusively found in the Romualdo Formation. It is the most complete
postcranial material assigned to the Thalassodrominae described so
far.