In three of these genera (A, F, and I) a species has transmitted modified descendants to the present day, represented by the fifteen genera (a14 to z14) on the uppermost horizontal line.
Genero horietariko hirutan (A, F eta I), espezie batek ondorengo eraldatuak transmititu ditu gaurdaino, goiko lerro horizontaleko hamabost generoak (a14tik z14ra), alegia.