Fossil Musculature of the Most Primitive Jawed Vertebrates

Author:

Trinajstic Kate12,Sanchez Sophie34,Dupret Vincent4,Tafforeau Paul3,Long John56,Young Gavin6,Senden Tim7,Boisvert Catherine8,Power Nicola6,Ahlberg Per Erik4

Affiliation:

1. Western Australian Organic and Isotope Geochemistry Centre, Department of Chemistry, Curtin University, Perth, Western Australia 6102, Australia.

2. Earth and Planetary Sciences, Western Australian Museum, Perth, Western Australia 6000, Australia.

3. European Synchrotron Radiation Facility, 38043 Grenoble Cedex, France.

4. Subdepartment of Evolution and Development, Department of Organismal Biology, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden.

5. School of Biological Sciences, Flinders University, PO Box 2100, Adelaide, South Australia 5001, Australia.

6. Research School of Earth Sciences, The Australian National University, Canberra 0200, Australia.

7. Department of Applied Mathematics, Research School of Physics and Engineering, The Australian National University, Canberra 0200, Australia.

8. Australian Regenerative Medicine Institute, Monash University, Victoria 3800, Australia.

Abstract

From Jawless to Jawed The earliest vertebrates were jawless. Past reconstructions have assumed that the primitive jawed condition was much like that found in sharks. Trinajstic et al. (p. 160 , published online 13 June; see the Perspective by Kuratani ) describe fossil musculature from the early jawed placoderms (an extinct class of armored prehistoric fish) that show that the basal structure was distinct from that found in sharks, having a notable dermal joint between the skull and shoulder girdle.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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