Retortamonad
Retortamonas Chilomastix The retortamonads are a small group of flagellates, most commonly found in the intestines of animals as commensals, although a free-living species called the Chilomastix cuspidata exists.[1] They are usually around 5-20 μm in length, and all of their small subunit ribosomal RNA gene sequences are very similar to each other.The retortamonads lack mitochondria, golgi apparatus, dictyosomes, and peroxisomes.Due to the abundant phylogenetic similarities between the two flagellates, since diplomonads do not ancestrally lack mitochondrion, this suggests that retortamonads are also secondarily amitochondriate."Retortamonad Flagellates are Closely Related to Diplomonads— Implications for the History of Mitochondrial Function in Eukaryote Evolution".