Highest number of chromosomes in the non-polyploid eukaryotic organisms.[117] [117] Adders-tongue (Ophioglossum) 1260 n=120–720 with a high degree of polyploidization[118] Ophioglossum reticulatum n=720 in hexaploid species, 2n=1260 in decaploid species [119] Ciliated protozoa (Tetrahymena thermophila) 10 (in micronucleus) 50x = 12,500 (in macronucleus, except minichromosomes) 10,000x = 10,000 (macronuclear minichromosomes)[120] Ciliated protozoa (Oxytricha trifallax) 15600 Macronuclear "nanochromosomes"; ampliploid. MAC chromosomes × 1900 ploidy level = 2.964 × 107 chromosomes [121][122][123]