Stichotrich Explained

The stichotrichs were a proposed group of ciliates, in the class Spirotrichea. In a classification system proposed by Eugene Small and Denis Lynn in 1985, Stichotrichia formed a subclass containing four orders: Stichotrichida, Urostylida, Sporadotrichida and Plagiotomida.^[1] Although the group was made up of species traditionally classified among the "hypotrichs"—ciliates possessing compound ciliary organelles called cirri—it excluded euplotid ciliates such as Euplotes and Diophrys, which were placed in the subclass Hypotrichia. In later classifications proposed by Denis Lynn, Stichotrichia omits the order Plagiotomida (species in that group were relocated to the order Stichotrichida).^[2]

In more recent classifications, members of Stichotrichia, as defined by Small and Lynn., are placed in the subclass Hypotrichia, and euplotid ciliates are placed in the subclass Euplotia.^{[3] [4]}

Like the euplotids, stichotrichs (or hypotrichs, in the sense of Gao et al., 2016) have body cilia fused into cirri, but these are mostly arranged into rows, running along the ventral surface or edges of the cell. Most stichotrichs are flattened and reasonably flexible, although some, such as Stylonychia, have rigid bodies. Characteristic genera include Stylonychia, Oxytricha, Uroleptus and Urostyla.

Etymology

The term stichotrich derives from the ancient greek, meaning "row", and,, meaning 'hair',^{[5] [6]} because of the arrangement into rows of the cilia.

Genomics

The draft macronuclear genome of Oxytricha trifallax was published in 2013.^[7]

External links

• Web site: Herrick . Glenn . vanc . Stichotrich molecular biology . International Society of Protistologists . https://web.archive.org/web/20100604130551/https://www.uga.edu/protozoa/portal/stich_molec_bio.html . 4 June 2010 .

Notes and References

1. Book: Lee, John J. . The Illustrated Guide to the Protozoa Vol. I. vanc . Society of Protozoologists. 2000. 1-891276-22-0. Lawrence, Kansas. 394–5.
2. Book: Lynn, Denis . The Ciliated Protozoa: Characterization, Classification, and Guide to the Literature. vanc . 2008. Springer Netherlands. 9781402082382. 3. en.
3. Gao F, Warren A, Zhang Q, Gong J, Miao M, Sun P, Xu D, Huang J, Yi Z, Song W . 6 . The All-Data-Based Evolutionary Hypothesis of Ciliated Protists with a Revised Classification of the Phylum Ciliophora (Eukaryota, Alveolata) . Scientific Reports . 6 . 24874 . April 2016 . 27126745 . 4850378 . 10.1038/srep24874 . 2016NatSR...624874G .
4. Adl SM, Bass D, Lane CE, Lukeš J, Schoch CL, Smirnov A, Agatha S, Berney C, Brown MW, Burki F, Cárdenas P, Čepička I, Chistyakova L, Del Campo J, Dunthorn M, Edvardsen B, Eglit Y, Guillou L, Hampl V, Heiss AA, Hoppenrath M, James TY, Karnkowska A, Karpov S, Kim E, Kolisko M, Kudryavtsev A, Lahr DJ, Lara E, Le Gall L, Lynn DH, Mann DG, Massana R, Mitchell EA, Morrow C, Park JS, Pawlowski JW, Powell MJ, Richter DJ, Rueckert S, Shadwick L, Shimano S, Spiegel FW, Torruella G, Youssef N, Zlatogursky V, Zhang Q . 6 . Revisions to the Classification, Nomenclature, and Diversity of Eukaryotes . The Journal of Eukaryotic Microbiology . 66 . 1 . 4–119 . January 2019 . 30257078 . 6492006 . 10.1111/jeu.12691 .
5. Book: Bailly, Anatole . Abrégé du dictionnaire grec français. vanc . 1981-01-01. Hachette. 2010035283. 461974285. Paris.
6. Web site: Greek-french dictionary online. Bailly. Anatole . vanc . www.tabularium.be. 2017-01-24.
7. Swart EC, Bracht JR, Magrini V, Minx P, Chen X, Zhou Y, Khurana JS, Goldman AD, Nowacki M, Schotanus K, Jung S, Fulton RS, Ly A, McGrath S, Haub K, Wiggins JL, Storton D, Matese JC, Parsons L, Chang WJ, Bowen MS, Stover NA, Jones TA, Eddy SR, Herrick GA, Doak TG, Wilson RK, Mardis ER, Landweber LF . 6 . The Oxytricha trifallax macronuclear genome: a complex eukaryotic genome with 16,000 tiny chromosomes . PLOS Biology . 11 . 1 . e1001473 . 2013 . 23382650 . 3558436 . 10.1371/journal.pbio.1001473 . free .