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<table border="0" cellspacing="5" cellpadding="0"><tbody><tr><td colspan="3"> <p> <strong>Maximum (U) and minimum (L) time constrains (MYA) used for dating at nodes in Fig. 2</strong> </p> </td> </tr><tr><td align="left">Node<br></td> <td align="left">Constraint<br></td> <td align="left">Reference information<br></td> </tr><tr><td colspan="3"> <hr></td> </tr><tr><td align="left">A<br></td> <td align="left">L416<br></td> <td align="left"><em>Psarolepis </em>fossil (the earliest Sarcopterygii) from Ludlow (Silurian) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B2">2</a>]<em>Lophosteus </em>and <em>Andreolepis </em>fossils (the earliest Actinopterygii) from Ludlow (Silurian) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B64">64</a>]<br></td> </tr><tr><td align="left">A<br></td> <td align="left">U528<br></td> <td align="left">Probable divergence time between chondrichthyans and osteichthyans (528 MYA), based on both fossils and molecules <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B58">58</a>]<br></td> </tr><tr><td align="left">B<br></td> <td align="left">L392<br></td> <td align="left">Stem-actinopterans known from the Givetian/Eifelian boundary <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">B<br></td> <td align="left">U450<br></td> <td align="left">Probable divergence time between sarcopterygians and actinopterygians (450 MYA), based on both fossils and molecules <a></a><a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B6">6</a>,<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B58">58</a>]<br></td> </tr><tr><td align="left">C<br></td> <td align="left">L345<br></td> <td align="left">Tournasian <em>Cosmoptychius </em>as the earliest stem-group neopterygian <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">C<br></td> <td align="left">U392<br></td> <td align="left">Estimated divergence time between polypterids and actinopterans <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">D<br></td> <td align="left">L130<br></td> <td align="left"><em>Protosephuru </em>(paddlefish) from Hauterivian (Cretaceous) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">E<br></td> <td align="left">L284<br></td> <td align="left"><em>Brachydegma </em>from early Permian <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">F<br></td> <td align="left">L136<br></td> <td align="left">Stem-hiodontid <em>Yambiania </em>from the Lower Cretaceous <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">G<br></td> <td align="left">L112<br></td> <td align="left">Osteoglossoid fossil from the Aptian (Cretaceous) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">H<br></td> <td align="left">L151<br></td> <td align="left">Stem-elopomorph <em>Elopsomolos </em>from the Kimmeridgian (Jurassic) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">I<br></td> <td align="left">L90<br></td> <td align="left">Albuloid fossil from the Cenomanian (Cretaceous) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">J<br></td> <td align="left">L50<br></td> <td align="left">Anguillid and congrid fossils from the Ypresian (Tertiary) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">K<br></td> <td align="left">L146<br></td> <td align="left">Stem-ostariophysan <em>Tischlingerichthys </em>from Tithonian (Jurassic) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B57">57</a>]<br></td> </tr><tr><td align="left">L<br></td> <td align="left">L57<br></td> <td align="left">Clupeid fossil from the Thanetian (Tertiary) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">M<br></td> <td align="left">L50<br></td> <td align="left">Cyprinid fossil from the Ypresian (Tertiary) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">N<br></td> <td align="left">L74<br></td> <td align="left">Esociform fossil from the Campanian (Cretaceous) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">O<br></td> <td align="left">L94<br></td> <td align="left">Polymixiid fossil from the Cenomanian (Cretaceous) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">P<br></td> <td align="left">L50<br></td> <td align="left">Pleuronectiform fossil from the Ypresian (Tertiary) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B4">4</a>]<br></td> </tr><tr><td align="left">Q<br></td> <td align="left">L98<br></td> <td align="left">Tetraodontiform fossil from the Cenomanian (Cretaceous) <a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B2">2</a>]<br></td> </tr><tr><td align="left">R<br></td> <td align="left">L32<br></td> <td align="left">Estimated divergence time between <em>Takifugu </em>and <em>Tetraodon </em><a></a>[<a href="http://www.biomedcentral.com/1471-2148/8/215/ref#B2">2</a>]</td> </tr></tbody></table>
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