Mapping of the example of scores for intermediate digit IV versus proximal digit II. In all syndactylous marsupials, intermediate digit IV ossifies before proximal digit II (white lines), while both ossifications appear simultaneously in all other mammals (solid black line).<p><b>Copyright information:</b></p><p>Taken from "Integration, heterochrony, and adaptation in pedal digits of syndactylous marsupials"</p><p>http://www.biomedcentral.com/1471-2148/8/160</p><p>BMC Evolutionary Biology 2008;8():160-160.</p><p>Published online 25 May 2008</p><p>PMCID:PMC2430710.</p><p></p
