<Tr> <Td> </Td> <Td> <P> Xenarthra (armadillos, anteaters, sloths) </P> </Td> </Tr> <P> Xenarthra (armadillos, anteaters, sloths) </P> <Tr> <Td> Afrotheria </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Afrosoricida (golden moles, tenrecs, otter shrews) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Macroscelidea (elephant shrews) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Tubulidentata (aardvarks) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> Paenungulata ("not quite ungulates") </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Hyracoidea (hyraxes) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Proboscidea (elephants) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Sirenia (manatees, dugongs) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> </Td> <Td> <P> Afrosoricida (golden moles, tenrecs, otter shrews) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Macroscelidea (elephant shrews) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Tubulidentata (aardvarks) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> Paenungulata ("not quite ungulates") </Td> <Td> <Table> <Tr> <Td> </Td> <Td> <P> Hyracoidea (hyraxes) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Proboscidea (elephants) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> <P> Sirenia (manatees, dugongs) </P> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> </Td> </Tr> </Table>

When did small mammals appear in the fossil records