In between Tagetes and Tetradium which one was described as a genus by Linnaeus in 1753?
Tagetes Tagetes is a genus of annual or perennial, mostly herbaceous plants in the sunflower family (Asteraceae or Compositae). It was described as a genus by Linnaeus in 1753.
Tetrahymena Tetrahymena is a genus of free-living ciliates that can also switch from commensalistic to pathogenic modes of survival. They are common in freshwater ponds. "Tetrahymena" species used as model organisms in biomedical research are "T. thermophila" and "T. pyriformis".