sentences:  There is considerable evidence that cryptophyte chloroplasts are closely related to those of the heterokonts and haptophytes, and the three groups are sometimes united as the Chromista.However, the case that the organisms themselves are closely related is not very strong, and they may have acquired plastids independently.Currently they are discussed to be members of the clade Diaphoretickes and to form together with the Haptophyta the group Hacrobia.