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Microcotyle donavini
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<h2 id="taxonomy">Taxonomy</h2> <p><i>Microcotyle donavini</i> was described by Van Beneden & Hesse in 1863.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> This species was redescribed by Scott (1905) who gave one figure <a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> and by <a href="/facts/Louis_Euzet/TQyRYhGW">Euzet</a> & Marc in 1963, one hundred years later.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p><p><i>Microcotyle donavini</i> is the type-species of the genus <i><a href="/facts/Microcotyle/WSlfYQ7a">Microcotyle</a></i>. Unnithan (1971) placed <i>M. donavini</i> in the nominal subgenus <i>Microcotyle</i> as <i>Microcotyle (Microcotyle) donavini</i>.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> However, this species was returned to the genus <i><a href="/facts/Microcotyle/WSlfYQ7a">Microcotyle</a></i> by Mamaev in 1986. <a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> </p> <h2 id="morphology">Morphology</h2> <p><i>Microcotyle donavini</i> has the general morphology of all species of <i><a href="/facts/Microcotyle/WSlfYQ7a">Microcotyle</a></i>, with a symmetrical body, comprising an anterior part which contains most organs and a posterior part called the <a href="/facts/Haptor/5GQqQTRb">haptor</a>. The haptor is symmetrical, and bears 86 <a href="/facts/Clamp_(zoology)/9Tw2kxf4">clamps</a>, arranged as two rows, one on each side. The clamps of the haptor attach the animal to the <a href="/facts/Gill/FWgM3Jp8">gill</a> of the fish. There are also two buccal oval <a href="/facts/Sucker_(zoology)/XGXebc5a">suckers</a>, septated, located at the anterior extremity. The digestive organs include an anterior, terminal mouth, a pharynx, an <a href="/facts/Oesophagus/XWa7WoWn">oesophagus</a> and a posterior <a href="/facts/Intestine/nK2zwqBS">intestine</a> with two lateral branches provided with numerous secondary branches. Each adult contains male and female reproductive organs. The reproductive organs include an anterior oval genital atrium, armed with numerous small <a href="/facts/Spine_(zoology)/JWqp5oJW">spines</a>, a medio-dorsal <a href="/facts/Vagina/ca5jsTwF">vagina</a> opening at 750 μm from the anterior extremity, a single <a href="/facts/Ovary/z2hG6bNy">ovary</a> and 18-22 oval <a href="/facts/Testicle/Doy40hoq">testes</a> which are posterior to the ovary. The eggs are fusiform, with a filament at each pole; one is short and thick. <a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> </p> <h2 id="hosts-and-localities">Hosts and localities</h2> <p>The host-type is <i><a href="/facts/Labrus_bergylta/PXV4no8u">Labrus bergylta</a></i>. The type-locality is off <a href="/facts/Brest%2c_France/GQyqB8nV">Brest</a>, France.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> </p> <h2 id="gallery">Gallery</h2> <p>Drawings of various organs or stages of <i>Microcotyle donavini</i>, by <a href="/facts/Louis_Euzet/TQyRYhGW">Euzet</a> & Marc, 1963. </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Van Beneden, P. J., & Hesse, C. E. (1863). Recherches sur les Bdellodes (Hirudinées) et les trématodes marins: Mémoire présenté à l'Académie Royale de Belgique. Mémoires de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique, 34, 1-150 + Plates. <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Scott (T.), 1905. — Observations on some parasites new or rare in Scottish waters. 23, rd. Rep. Fish. Bd. Scot. (3) Sci. Invest. p. 108-119 fig. <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Euzet, Louis; Marc, Annie (1963). "Microcotyle donavini Van Beneden et Hesse 1863 espèce type du genre Microcotyle Van Beneden et Hesse 1863". Annales de Parasitologie Humaine et Comparée. 38 (6): 875–886. doi:10.1051/parasite/1963386875. ISSN 0003-4150. PMID 14152058. <a href="https://www.parasite-journal.org/articles/parasite/abs/1963/06/parasite1963386p875/parasite1963386p875.html" target="_blank">https://www.parasite-journal.org/articles/parasite/abs/1963/06/parasite1963386p875/parasite1963386p875.html</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Unnithan, R. V. (1971). On the functional morphology of a new fauna of Monogenoidea on fishes from Trivandrum and environs. Part IV. Microcotylidae sensu stricto and its repartition into subsidiary taxa. American Midland Naturalist, 366-398. <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Mamaev, Y. L. (1986). The taxonomical composition of the family Microcotylidae Taschenberg, 1879 (Monogenea). Folia Parasitologica, 33, 199-206. PDF <a href="https://folia.paru.cas.cz/pdfs/fol/1986/03/02.pdf" target="_blank">https://folia.paru.cas.cz/pdfs/fol/1986/03/02.pdf</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Euzet, Louis; Marc, Annie (1963). "Microcotyle donavini Van Beneden et Hesse 1863 espèce type du genre Microcotyle Van Beneden et Hesse 1863". Annales de Parasitologie Humaine et Comparée. 38 (6): 875–886. doi:10.1051/parasite/1963386875. ISSN 0003-4150. PMID 14152058. <a href="https://www.parasite-journal.org/articles/parasite/abs/1963/06/parasite1963386p875/parasite1963386p875.html" target="_blank">https://www.parasite-journal.org/articles/parasite/abs/1963/06/parasite1963386p875/parasite1963386p875.html</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Van Beneden, P. J., & Hesse, C. E. (1863). Recherches sur les Bdellodes (Hirudinées) et les trématodes marins: Mémoire présenté à l'Académie Royale de Belgique. Mémoires de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique, 34, 1-150 + Plates. <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> </ol>