Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China
A new three-dimensionally preserved troodontid specimen consisting of most of the skull, partial mandibles and six articulated cervical vertebrae (PMOL-AD00102) from the Early Cretaceous Yixian Formation of Beipiao, western Liaoning, China is identified as Sinovenator changii on the basis of a suran...
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PeerJ Inc.
2018-06-01
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| Online Access: | https://peerj.com/articles/4977.pdf |
| _version_ | 1827609208482168832 |
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| author | Ya-Lei Yin Rui Pei Chang-Fu Zhou |
| author_facet | Ya-Lei Yin Rui Pei Chang-Fu Zhou |
| author_sort | Ya-Lei Yin |
| collection | DOAJ |
| description | A new three-dimensionally preserved troodontid specimen consisting of most of the skull, partial mandibles and six articulated cervical vertebrae (PMOL-AD00102) from the Early Cretaceous Yixian Formation of Beipiao, western Liaoning, China is identified as Sinovenator changii on the basis of a surangular with a “T”-shaped cross-section. High-resolution computed tomographic data for the skull of this new specimen facilitated a detailed description of the cranial anatomy of S. changii. New diagnostic features of S. changii include a well-developed medial shelf on the jugal, a slender bar in the parasphenoid recess, a lateral groove on the pterygoid flange of the ectopterygoid, and the lateral surface of the anterior cervical vertebrae bearing two pneumatic foramina. Our new observation confirms that the braincase of Sinovenator is not as primitive as previously suggested, although it still shows an intermediate state between derived troodontids and non-troodontid paravians in having an initial stage of the subotic recess and the otosphenoidal crest. Additionally, this new specimen reveals some novel and valuable anatomical information of troodontids regarding the quadrate-quadratojugal articulation, the stapes, the epipterygoid and the atlantal ribs. |
| first_indexed | 2024-03-09T07:28:00Z |
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| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T07:28:00Z |
| publishDate | 2018-06-01 |
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| spelling | doaj.art-2b8614e06d814488ab403157eabbcb1c2023-12-03T06:47:51ZengPeerJ Inc.PeerJ2167-83592018-06-016e497710.7717/peerj.4977Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, ChinaYa-Lei Yin0Rui Pei1Chang-Fu Zhou2Paleontological Institute, Shenyang Normal University, Shenyang, Liaoning, ChinaDepartment of Earth Sciences, the University of Hong Kong, Hong Kong, ChinaCollege of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, ChinaA new three-dimensionally preserved troodontid specimen consisting of most of the skull, partial mandibles and six articulated cervical vertebrae (PMOL-AD00102) from the Early Cretaceous Yixian Formation of Beipiao, western Liaoning, China is identified as Sinovenator changii on the basis of a surangular with a “T”-shaped cross-section. High-resolution computed tomographic data for the skull of this new specimen facilitated a detailed description of the cranial anatomy of S. changii. New diagnostic features of S. changii include a well-developed medial shelf on the jugal, a slender bar in the parasphenoid recess, a lateral groove on the pterygoid flange of the ectopterygoid, and the lateral surface of the anterior cervical vertebrae bearing two pneumatic foramina. Our new observation confirms that the braincase of Sinovenator is not as primitive as previously suggested, although it still shows an intermediate state between derived troodontids and non-troodontid paravians in having an initial stage of the subotic recess and the otosphenoidal crest. Additionally, this new specimen reveals some novel and valuable anatomical information of troodontids regarding the quadrate-quadratojugal articulation, the stapes, the epipterygoid and the atlantal ribs.https://peerj.com/articles/4977.pdfTroodontidaeSinovenatorJehol BiotaYixian FormationEarly Cretaceous |
| spellingShingle | Ya-Lei Yin Rui Pei Chang-Fu Zhou Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China PeerJ Troodontidae Sinovenator Jehol Biota Yixian Formation Early Cretaceous |
| title | Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China |
| title_full | Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China |
| title_fullStr | Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China |
| title_full_unstemmed | Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China |
| title_short | Cranial morphology of Sinovenator changii (Theropoda: Troodontidae) on the new material from the Yixian Formation of western Liaoning, China |
| title_sort | cranial morphology of sinovenator changii theropoda troodontidae on the new material from the yixian formation of western liaoning china |
| topic | Troodontidae Sinovenator Jehol Biota Yixian Formation Early Cretaceous |
| url | https://peerj.com/articles/4977.pdf |
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