Tapejara (pterosaur)

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Tapejara
Temporal range: Early Cretaceous, 108 Ma
Tapejara.jpg
Reconstructed skeleton
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Order: Pterosauria
Suborder: Pterodactyloidea
Family: Tapejaridae
Subfamily: Tapejarinae
Genus: Tapejara
Kellner, 1989
Species: † T. wellnhoferi
Binomial name
Tapejara wellnhoferi
Kellner, 1989

Tapejara (from a Tupi word meaning "the old being") is a genus of Brazilian pterosaur from the Cretaceous Period (Santana Formation, dating to about 108 Ma ago). Tapejara crests consisted of a semicircular crest over the snout, and a bony prong which extended back behind the head.

Species and classification[edit]

Reconstructed profiles of (from top to bottom) Tapejara wellnhoferi, Tupandactylus navigans, and Tupandactylus imperator

The type species and only one currently recognized as valid by most researchers, is T. wellnhoferi. The specific name honours German paleontologist Peter Wellnhofer. Two larger species, originally named Tapejara imperator and Tapejara navigans, were later classified in the genus Tapejara. However, several studies have shown that T. imperator and T. navigans are significantly different from T. wellnhoferi and therefore were reclassified into new genera. The species T. imperator was given its own genus, Tupandactylus, by Kellner and Campos.[1] Unwin and Martill found that T. imperator and T. navigans belong in the same genus, and named them Ingridia imperator and I. navigans, respectively. This genus name honoured Wellnhofer's late wife Ingrid.[2] Because Tupandactylus was named first, it retained priority over the name Ingridia. To complicate matters, both the name Tupandactylus and Ingridia used the former Tapejara imperator as their type species.[3] The scientists who described Tupandactylus did not name a Tupandactylus navigans (but instead suggested it was synonymous to Tupandactylus imperator), and Tapejara navigans was not formally reclassified as a distinct species of Tupandactylus until 2011.[4]

The cladogram below follows the 2014 analysis Andres and colleagues.[5]

 Azhdarchoidea 

 Neoazhdarchia


Tapejaromorpha

Bennettazhia oregonensis





Eopteranodon lii




"Sinopterus" gui



Nemicolopterus crypticus






Huaxiapterus jii


Tapejaridae

Sinopterus dongi


Tapejarinae


"Huaxiapterus" benxiensis



"Huaxiapterus" corollatus



Tapejarini


Tupandactylus navigans



Tupandactylus imperator





Bakonydraco galaczi




Europejara olcadesorum



Tapejara wellnhoferi











Paleobiology[edit]

Comparisons between the scleral rings of Tapejara and modern birds and reptiles suggest that it may have been cathemeral, active throughout the day at short intervals.[6]

References[edit]

  1. ^ Kellner, A.W.A.; Campos, D.A. (2007). "Short note on the ingroup relationships of the Tapejaridae (Pterosauria, Pterodactyloidea". Boletim do Museu Nacional 75: 1–14. 
  2. ^ Unwin, D. M. and Martill, D. M. (2007). "Pterosaurs of the Crato Formation." In Martill, D. M., Bechly, G. and Loveridge, R. F. (eds), The Crato Fossil Beds of Brazil: Window into an Ancient World. Cambridge University Press (Cambridge), pp. 475-524.
  3. ^ Naish, D. (2008). "Crato Formation fossils and the new tapejarids." Weblog entry. Tetrapod Zoology. 18 January 2008. Accessed 31 January 2008 (http://scienceblogs.com/tetrapodzoology/2008/01/crato_formation_tapejarids.php).
  4. ^ Pinheiro, F.L., Fortier, D.C., Schultz, C.L., De Andrade, J.A.F.G. and Bantim, R.A.M. (in press). "New information on Tupandactylus imperator, with comments on the relationships of Tapejaridae (Pterosauria)." Acta Palaeontologica Polonica, in press, available online 03 Jan 2011. doi:10.4202/app.2010.0057
  5. ^ Andres, B.; Clark, J.; Xu, X. (2014). "The Earliest Pterodactyloid and the Origin of the Group". Current Biology. doi:10.1016/j.cub.2014.03.030. 
  6. ^ Schmitz, L.; Motani, R. (2011). "Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology". Science 332 (6030): 705–8. doi:10.1126/science.1200043. PMID 21493820.