| Reference Type | Journal (article/letter/editorial) |
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| Title | Rostral structure in Thalattosauria (Reptilia, Diapsida) |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Rieppel, Olivier | Author |
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| Müller, Johannes | Author |
| Liu, Jun | Author |
| Year | 2005 (December 1) | Volume | 42 |
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| Issue | 12 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e05-076Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 484005 | Long-form Identifier | mindat:1:5:484005:7 |
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| GUID | 0 |
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| Full Reference | Rieppel, Olivier, Müller, Johannes, Liu, Jun (2005) Rostral structure in Thalattosauria (Reptilia, Diapsida) Canadian Journal of Earth Sciences, 42 (12) 2081-2086 doi:10.1139/e05-076 |
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| Plain Text | Rieppel, Olivier, Müller, Johannes, Liu, Jun (2005) Rostral structure in Thalattosauria (Reptilia, Diapsida) Canadian Journal of Earth Sciences, 42 (12) 2081-2086 doi:10.1139/e05-076 |
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| In | (2005, December) Canadian Journal of Earth Sciences Vol. 42 (12) Canadian Science Publishing |
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| Abstract/Notes | The rostral structure of thalattosaurs is reviewed on the basis of a re-investigation of the holotype of Nectosaurus halius and Thalattosaurus alexandrae. The askeptosaurid genera Askeptosaurus and Anshunsaurus share an elongated, parallel-sided rostrum that terminates in a blunt tip. A diastema separating the premaxillary from the maxillary teeth is absent. The claraziid genera Clarazia and Thalattosaurus share a relatively shorter rostrum that has convergent lateral margins and that terminates in a pointed tip. A diastema separating the premaxillary from the maxillary teeth is present. The well-preserved holotype of Nectosaurus halius shows a highly derived rostral structure. The maxilla is short with an anteriorly truncated (vertical) margin, a narrow but high ascending process, and a dorsally curving medial flange that is in natural articulation with the ventrally deflected vomer. These findings corroborate Peyer's original reconstruction of Hescheleria with a nearly vertically placed premaxilla. |
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