Research Library | Digital Repository

Complex overlapping joints between facial bones allowing limited anterior sliding movements of the snout in diplodocid sauropods. (American Museum novitates, no. 3911)

Show simple item record

dc.contributor.author Tschopp, Emanuel
dc.contributor.author Mateus, Octávio
dc.contributor.author Norell, Mark.
dc.date.accessioned 2018-10-25T15:14:23Z
dc.date.available 2018-10-25T15:14:23Z
dc.date.issued 2018-10-25
dc.identifier.uri http://digitallibrary.amnh.org/handle/2246/6913
dc.description 16 pages : illustrations (chiefly color) ; 26 cm. en_US
dc.description.abstract Diplodocid sauropods had a unique skull morphology, with posteriorly retracted nares, an elongated snout, and anteriorly restricted, peglike teeth. Because of the lack of extant analogs in skull structure and tooth morphology, understanding their feeding strategy and diet has been difficult. Furthermore, the general rarity of sauropod skulls and the fragility of their facial elements resulted in a restricted knowledge of cranial anatomy, in particular regarding the internal surface of the facial skull. Here, we describe in detail a well-preserved diplodocid skull visible in medial view. Diagnostic features recognized in other skulls observable in lateral view, such as the extended contribution of the jugal to the antorbital fenestra, are obliterated in medial view due to extensive overlapping joints between the maxilla, jugal, quadratojugal, and the lacrimal. These overlapping joints permitted limited anterior sliding movement of the snout, which likely served as a kind of "shock-absorbing" mechanism during feeding. Diplodocid skulls therefore seem to have evolved to alleviate stresses inflicted on the snout during backward movements of the head, as would be expected during branch-stripping or raking. en_US
dc.language.iso en_US en_US
dc.publisher American Museum of Natural History. en_US
dc.relation.ispartofseries American Museum novitates;no.3911.
dc.subject Diplodocidae -- Anatomy. en_US
dc.subject Facial bones. en_US
dc.subject Joints. en_US
dc.subject Skull -- Anatomy. en_US
dc.subject Reptiles, Fossil -- Anatomy. en_US
dc.subject Paleontology -- Jurassic. en_US
dc.subject Wyoming. en_US
dc.subject Morrison Formation en_US
dc.title Complex overlapping joints between facial bones allowing limited anterior sliding movements of the snout in diplodocid sauropods. (American Museum novitates, no. 3911) en_US
dc.title.alternative Sliding joints in diplodocid skulls. en_US


Files in this item

This item appears in the following Collection(s)

  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

Show simple item record

Search Entire Repository

Advanced Search

Browse

My Account