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New Jurassic mammaliaform sheds light on early evolution of mammal-like hyoid bones.
Science 2019; 365(6450):276-279Sci

Abstract

We report a new Jurassic docodontan mammaliaform found in China that is preserved with the hyoid bones. Its basihyal, ceratohyal, epihyal, and thyrohyal bones have mobile joints and are arranged in a saddle-shaped configuration, as in the mobile linkage of the hyoid apparatus of extant mammals. These are fundamentally different from the simple hyoid rods of nonmammaliaform cynodonts, which were likely associated with a wide, nonmuscularized throat, as seen in extant reptiles. The hyoid apparatus provides a framework for the larynx and for the constricted, muscularized esophagus, crucial for transport and powered swallowing of the masticated food and liquid in extant mammals. These derived structural components of hyoids evolved among early diverging mammaliaforms, before the disconnection of the middle ear from the mandible in crown mammals.

Authors+Show Affiliations

Paleontological Museum of Liaoning, Shenyang Normal University, Shenyang Liaoning 110034, China. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.Department of Geology and Geophysics and Peabody Museum of Natural History, Yale University, New Haven, CT 06511, USA.Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, IL 60637, USA.Section Paleontology, Institute of Geosciences, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany. tmartin@uni-bonn.de zxluo@uchicago.edu.Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, IL 60637, USA. tmartin@uni-bonn.de zxluo@uchicago.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31320539

Citation

Zhou, Chang-Fu, et al. "New Jurassic Mammaliaform Sheds Light On Early Evolution of Mammal-like Hyoid Bones." Science (New York, N.Y.), vol. 365, no. 6450, 2019, pp. 276-279.
Zhou CF, Bhullar BS, Neander AI, et al. New Jurassic mammaliaform sheds light on early evolution of mammal-like hyoid bones. Science. 2019;365(6450):276-279.
Zhou, C. F., Bhullar, B. S., Neander, A. I., Martin, T., & Luo, Z. X. (2019). New Jurassic mammaliaform sheds light on early evolution of mammal-like hyoid bones. Science (New York, N.Y.), 365(6450), pp. 276-279. doi:10.1126/science.aau9345.
Zhou CF, et al. New Jurassic Mammaliaform Sheds Light On Early Evolution of Mammal-like Hyoid Bones. Science. 2019 Jul 19;365(6450):276-279. PubMed PMID: 31320539.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - New Jurassic mammaliaform sheds light on early evolution of mammal-like hyoid bones. AU - Zhou,Chang-Fu, AU - Bhullar,Bhart-Anjan S, AU - Neander,April I, AU - Martin,Thomas, AU - Luo,Zhe-Xi, PY - 2018/07/29/received PY - 2019/06/12/accepted PY - 2019/7/20/entrez SP - 276 EP - 279 JF - Science (New York, N.Y.) JO - Science VL - 365 IS - 6450 N2 - We report a new Jurassic docodontan mammaliaform found in China that is preserved with the hyoid bones. Its basihyal, ceratohyal, epihyal, and thyrohyal bones have mobile joints and are arranged in a saddle-shaped configuration, as in the mobile linkage of the hyoid apparatus of extant mammals. These are fundamentally different from the simple hyoid rods of nonmammaliaform cynodonts, which were likely associated with a wide, nonmuscularized throat, as seen in extant reptiles. The hyoid apparatus provides a framework for the larynx and for the constricted, muscularized esophagus, crucial for transport and powered swallowing of the masticated food and liquid in extant mammals. These derived structural components of hyoids evolved among early diverging mammaliaforms, before the disconnection of the middle ear from the mandible in crown mammals. SN - 1095-9203 UR - https://www.unboundmedicine.com/medline/citation/31320539/New_Jurassic_mammaliaform_sheds_light_on_early_evolution_of_mammal-like_hyoid_bones L2 - http://www.sciencemag.org/cgi/pmidlookup?view=long&pmid=31320539 DB - PRIME DP - Unbound Medicine ER -