Hymenostomatida

Description: English: Two cells of complementary mating types pair to exchange nuclei during sexual conjugation. Date: 8 March 2016. Source: Own work. Author: Jmf368w.

Description: English: Tetrahymena conjugation When nutrients are scarce, two individuals (A) pair with each other and begin sexual reproduction (conjugation). (B) The diploid micronucleus in each individual undergoes meiosis to form four haploid nuclei, and three of these are degraded. (C) The remaining haploid nucleus divides mitotically to form two pronuclei in each cell. (D) One of the two pronuclei in each cell is exchanged with the mating partner, and fusion leads to he formation of the diploid zygotic nucleus. (E) The zygotic nucleus divides twice mitotically to form four nuclei. (F) Two nuclei become micronuclei, and the other two differentiate to become macronuclei; the original parental macronucleus is degraded. (G) Cell division occurs and the nuclei are distributed to the daughter cells so that each progeny receives one micronucleus and one macronucleus. Date: 16 April 2014, 11:58:27. Source: Own work. Author: Chaya5260.

Description: English: Ichthyophthirius multifiliis (ich) a common single-celled parasite of wild fish that finds its way into hatcheries through their water supplies (often streams and rivers that harbor wild fish populations). Date: 6 September 2013. Source: Flickr. Author: Andy Goodwin/USFWS.

Description: English: image of White Spot disease causing Ichthyophthirius multifiliis. Date: 6 May 2019. Source: Own work. Author: Premgarg.d.

Description: English: Simplified scheme of the life cycle of the fish parasite Ichthyophthirius multifiliis. Date: 29 May 2014, 00:29:23. Source: doi:10.3389/fenvs.2014.00018. Author: Peter R. Richter, Sebastian M. Strauch, Azizullah Azizullah and Donat-P. Häder. Other versions: : File:Life cycle of Ichthyophthirius multifiliis.svg is a vector version of this file. File:API → File:Life cycle of Ichthyophthirius multifiliis.svg For more information, see Help:SVG. In other languages. Alemannisch ∙ العربية ∙ беларуская (тарашкевіца) ∙ български ∙ বাংলা ∙ català ∙ нохчийн ∙ čeština ∙ dansk ∙ Deutsch ∙ Ελληνικά ∙ English ∙ British English ∙ Esperanto ∙ español ∙ eesti ∙ euskara ∙ فارسی ∙ suomi ∙ français ∙ Frysk ∙ galego ∙ עברית ∙ hrvatski ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ Ido ∙ italiano ∙ 日本語 ∙ ქართული ∙ 한국어 ∙ lietuvių ∙ македонски ∙ മലയാളം ∙ Bahasa Melayu ∙ norsk bokmål ∙ Plattdüütsch ∙ Nederlands ∙ norsk nynorsk ∙ norsk ∙ occitan ∙ polski ∙ português ∙ português do Brasil ∙ română ∙ русский ∙ sicilianu ∙ Scots ∙ slovenčina ∙ slovenščina ∙ српски / srpski ∙ svenska ∙ தமிழ் ∙ ไทย ∙ Türkçe ∙ татарча/tatarça ∙ українська ∙ vèneto ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−. : .

Description: English: Sketch to Colpidium colpoda. Date: 1902. Source: Freshwater and Marine Image Bank. Author: Gary N. Calkins (1869–1943) . Alternative names: G.N.Calk.; Gary Nathan Calkins; Gary Calkins. Description: American biologist. Date of birth/death: 18 January 1869 / 1869 4 January 1943 / 1943 . Authority control: : Q15676085 VIAF: 27854505 ISNI: 0000 0001 2022 9337 LCCN: n87818742 NLA: 35051493 Botanist: G.N.Calk. GND: 11766894X SUDOC: 124528686 NKC: mub2011638435 CiNii: DA15547758 NLI: 000488129 Koninklijke: 13050713X WorldCat. creator QS:P170,Q15676085.