File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Structure and homology of Psittacosaurus tail bristles

TitleStructure and homology of Psittacosaurus tail bristles
Authors
Issue Date2016
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/PALA
Citation
Palaeontology, 2016, v. 59 n. 6, p. 793-802 How to Cite?
AbstractWe examined bristle-like appendages on the tail of the Early Cretaceous basal ceratopsian dinosaur Psittacosaurus with laser-stimulated fluorescence imaging. Our study reveals previously unknown details of these structures and confirms their identification as integumentary appendages. For the first time, we show that most bristles appear to be arranged in bundles and that they exhibit a pulp that widens towards the bristle base. We consider it likely that the psittacosaur bristles are structurally and developmentally homologous to similar filamentous appendages of other dinosaurs, namely the basal heterodontosaurid Tianyulong and the basal therizinosauroid theropod Beipiaosaurus, and attribute the greater robustness of the bristles of Psittacosaurus to a higher degree of cornification and calcification of its integument (both skin and bristles). Although the psittacosaur bristles are probably homologous with avian feathers in their origin from discrete cell populations, it is uncertain whether they developed from a follicle, one of the developmental hallmarks of true feathers. In particular, we note a striking resemblance between the psittacosaur bristles and the cornified spine on the head of the horned screamer, Anhima cornuta, an extant anseriform bird. Similar, albeit thinner keratinous filaments of extant birds are the ‘beard’ of the turkey, Meleagris gallopavo, and the crown of the Congo peafowl, Afropavo congensis. All of these structures of extant birds are distinct from true feathers, and because at least the turkey beard does not develop from follicles, detailed future studies of their development would be invaluable towards deepening our understanding of dinosaur filamentous integumentary structures.
Persistent Identifierhttp://hdl.handle.net/10722/231859
ISSN
2015 Impact Factor: 2.312
2015 SCImago Journal Rankings: 1.575

 

DC FieldValueLanguage
dc.contributor.authorMayr, G-
dc.contributor.authorPittman, MD-
dc.contributor.authorSaitta, E-
dc.contributor.authorKaye, TG-
dc.contributor.authorVinther, J-
dc.date.accessioned2016-09-20T05:25:57Z-
dc.date.available2016-09-20T05:25:57Z-
dc.date.issued2016-
dc.identifier.citationPalaeontology, 2016, v. 59 n. 6, p. 793-802-
dc.identifier.issn0031-0239-
dc.identifier.urihttp://hdl.handle.net/10722/231859-
dc.description.abstractWe examined bristle-like appendages on the tail of the Early Cretaceous basal ceratopsian dinosaur Psittacosaurus with laser-stimulated fluorescence imaging. Our study reveals previously unknown details of these structures and confirms their identification as integumentary appendages. For the first time, we show that most bristles appear to be arranged in bundles and that they exhibit a pulp that widens towards the bristle base. We consider it likely that the psittacosaur bristles are structurally and developmentally homologous to similar filamentous appendages of other dinosaurs, namely the basal heterodontosaurid Tianyulong and the basal therizinosauroid theropod Beipiaosaurus, and attribute the greater robustness of the bristles of Psittacosaurus to a higher degree of cornification and calcification of its integument (both skin and bristles). Although the psittacosaur bristles are probably homologous with avian feathers in their origin from discrete cell populations, it is uncertain whether they developed from a follicle, one of the developmental hallmarks of true feathers. In particular, we note a striking resemblance between the psittacosaur bristles and the cornified spine on the head of the horned screamer, Anhima cornuta, an extant anseriform bird. Similar, albeit thinner keratinous filaments of extant birds are the ‘beard’ of the turkey, Meleagris gallopavo, and the crown of the Congo peafowl, Afropavo congensis. All of these structures of extant birds are distinct from true feathers, and because at least the turkey beard does not develop from follicles, detailed future studies of their development would be invaluable towards deepening our understanding of dinosaur filamentous integumentary structures.-
dc.languageeng-
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/PALA-
dc.relation.ispartofPalaeontology-
dc.rightsThe definitive version is available at www.blackwell-synergy.com-
dc.titleStructure and homology of Psittacosaurus tail bristles-
dc.typeArticle-
dc.identifier.emailPittman, MD: mpittman@hku.hk-
dc.identifier.authorityPittman, MD=rp01622-
dc.identifier.doi10.1111/pala.12257-
dc.identifier.hkuros266958-
dc.identifier.volume59-
dc.identifier.issue6-
dc.identifier.spage793-
dc.identifier.epage802-
dc.publisher.placeUnited Kingdom-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats