In today's world, Ancyromonadida continues to be a topic of great relevance and interest to a large sector of the population. Over time, Ancyromonadida has managed to remain at the center of attention of academics, professionals and amateurs, demonstrating its importance and impact in different areas of society. Throughout history, Ancyromonadida has been the subject of numerous studies, debates and reflections, which has contributed to enriching knowledge on this topic. In this article, we will explore some key aspects related to Ancyromonadida, with the aim of delving into its meaning, its evolution and its relevance today.
Ancyromonadida or Planomonadida is a small group of biflagellatedprotists found in the soil and in aquatic habitats, where they feed on bacteria. Includes freshwater or marine organisms, benthic, dorsoventrally compressed and with two unequal flagellae, each emerging from a separate pocket. The apical anterior flagellum can be very thin or end in the cell membrane, while the posterior flagellum is long and is inserted ventrally or laterally. The cell membrane is supported by a thin single-layered theca and the mitochondrial crests are discoidal/flat.
The group's placement is doubtful, as it seems to fall outside the five supergroups of eukaryotes.Cavalier-Smith considers that they constitute a basal group to Amoebozoa and Opisthokonta and places it together with other related groups in Sulcozoa. However, they appear more basal than Malawimonas, placing them in Loukouzoa, possibly as stem podiates, and depending on the placement of the root position of the Eukaryotes.
^Cavalier-Smith T, Chao EE, Stechmann A, Oates B, Nikolaev S (October 2008). "Planomonadida ord. nov. (Apusozoa): ultrastructural affinity with Micronuclearia podoventralis and deep divergences within Planomonas gen. nov". Protist. 159 (4): 535–62. doi:10.1016/j.protis.2008.06.002. PMID18723395.
^Adl, Sina M.; Simpson, Alastair G. B.; Lane, Christopher E.; Lukeš, Julius; Bass, David; Bowser, Samuel S.; Brown, Matthew W.; Burki, Fabien; Dunthorn, Micah; Hampl, Vladimir; Heiss, Aaron; Hoppenrath, Mona; Lara, Enrique; Le Gall, Line; Lynn, Denis H.; McManus, Hilary; Mitchell, Edward A. D.; Mozley-Stanridge, Sharon E.; Parfrey, Laura W.; Pawlowski, Jan; Rueckert, Sonja; Shadwick, Laura; Schoch, Conrad L.; Smirnov, Alexey; Spiegel, Frederick W. (2012). "The Revised Classification of Eukaryotes". Journal of Eukaryotic Microbiology. 59 (5): 429–514. doi:10.1111/j.1550-7408.2012.00644.x. PMC3483872. PMID23020233.
^ abGlücksman, Snell & Cavalier-Smith (2013). "Phylogeny and evolution of Planomonadida (Sulcozoa): Eight new species and new genera Fabomonas and Nutomonas". European Journal of Protistology. 49 (2): 179–200. doi:10.1016/j.ejop.2012.08.007. PMID23369787.
^ abcdefghijklmYubuki, Naoji; Torruella, Guifré; Galindo, Luis Javier; Heiss, Aaron A.; Ciobanu, Maria Cristina; Shiratori, Takashi; Ishida, Ken‐ichiro; Blaz, Jazmin; Kim, Eunsoo; Moreira, David; López‐García, Purificación; Eme, Laura (November 2023). "Molecular and morphological characterization of four new ancyromonad genera and proposal for an updated taxonomy of the Ancyromonadida". Journal of Eukaryotic Microbiology. 70 (6: e12997). doi:10.1111/jeu.12997. hdl:2117/404022. ISSN1550-7408.