    10   40
MesohippusAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
HypohippusAAACCCCCCCAAAAAAAAACAAAAAAAAAAAAAAAAAAAA
ArchaeohipCAAAAAAAAAAAAAAAACACAAAAAAAAAAAAAAAAAAAA
ParahippusCAAACAACAACAAAAAAAACAAAAAAAAAAAAAAAAAAAA
MerychippuCCAACCACCACCCCACACCCAAAAAAAAAAAAAAAAAAAA
M. secunduCCAACCACCACCCACACCCCAAAAAAAAAAAAAAAAAAAA
Nannipus  CCAACCACAACCCCACACCCAAAAAAAAAAAAAAAAAAAA
NeohippariCCAACCCCCCCCCCACACCCAAAAAAAAAAAAAAAAAAAA
Calippus  CCAACCACAACCCACACCCCAAAAAAAAAAAAAAAAAAAA
PliohippusCCCACCCCCCCCCACACCCCAAAAAAAAAAAAAAAAAAAA