<Table> <Tr> <Th colspan="3"> Vertebrate groups </Th> <Th> Image </Th> <Th> Class </Th> <Th> Estimated number of described species </Th> <Th> Group totals </Th> </Tr> <Tr> <Th> Anamniote lack amniotic membrane so need to reproduce in water </Th> <Th> Jawless </Th> <Th> Fish </Th> <Td> </Td> <Td> Myxini ( hagfish ) </Td> <Td> </Td> <Td> 32,900 </Td> </Tr> <Tr> <Td> </Td> <Td> Hyperoartia ( lamprey ) </Td> <Td> </Td> </Tr> <Tr> <Th> Jawed </Th> <Td> </Td> <Td> cartilaginous fish </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> ray - finned fish </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> lobe - finned fish </Td> <Td> </Td> </Tr> <Tr> <Th> Tetrapods </Th> <Td> </Td> <Td> amphibians </Td> <Td> 7,302 </Td> <Td> 33,278 </Td> </Tr> <Tr> <Th> Amniote have amniotic membrane adapted to reproducing on land </Th> <Td> </Td> <Td> reptiles </Td> <Td> 10,711 </Td> </Tr> <Tr> <Td> </Td> <Td> birds </Td> <Td> 10,425 </Td> </Tr> <Tr> <Td> </Td> <Td> mammals </Td> <Td> 5,513 </Td> </Tr> <Tr> <Td colspan="6"> Total described species </Td> <Td> 66,178 </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="3"> Vertebrate groups </Th> <Th> Image </Th> <Th> Class </Th> <Th> Estimated number of described species </Th> <Th> Group totals </Th> </Tr> <Tr> <Th> Anamniote lack amniotic membrane so need to reproduce in water </Th> <Th> Jawless </Th> <Th> Fish </Th> <Td> </Td> <Td> Myxini ( hagfish ) </Td> <Td> </Td> <Td> 32,900 </Td> </Tr> <Tr> <Td> </Td> <Td> Hyperoartia ( lamprey ) </Td> <Td> </Td> </Tr> <Tr> <Th> Jawed </Th> <Td> </Td> <Td> cartilaginous fish </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> ray - finned fish </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> lobe - finned fish </Td> <Td> </Td> </Tr> <Tr> <Th> Tetrapods </Th> <Td> </Td> <Td> amphibians </Td> <Td> 7,302 </Td> <Td> 33,278 </Td> </Tr> <Tr> <Th> Amniote have amniotic membrane adapted to reproducing on land </Th> <Td> </Td> <Td> reptiles </Td> <Td> 10,711 </Td> </Tr> <Tr> <Td> </Td> <Td> birds </Td> <Td> 10,425 </Td> </Tr> <Tr> <Td> </Td> <Td> mammals </Td> <Td> 5,513 </Td> </Tr> <Tr> <Td colspan="6"> Total described species </Td> <Td> 66,178 </Td> </Tr> </Table>
in addition to fishes the subphylum vertebrata includes
in addition to fishes the subphylum vertebrata includes
amphibians reptiles birds mammals
amphibians reptiles birds mammals