Origin of Vertebrates. 14 September 2012. Devonian Sea Karen Carr Studio, Inc. Vertebrates – What are they?. Two major characteristics Vertebrae — bony (or cartilaginous) structures that usually surround the notochord and …
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14 September 2012
Karen Carr Studio, Inc.
Read pp. 84-86
Project and impale!
Slice and crush!
M.A. Purnell and P.C.J. Donoghue (1997) Architecture and functional morphology of the skeletal apparatus of ozarkodinidconodonts. Phil. Trans. R. Soc. Lond. B, 352: 1545-1564
Pteraspidomorphs – no paired fins, paired nasal openings
“Other ostracoderms”– some with (non-homologous) paired fins, most single nasal opening
H= humerus; Int = intermedium; R = radius; U = ulna; Ure = ulnare.
Scale bar, 1 cm