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Microcotyle odacis
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<h2 id="systematics">Systematics</h2> <p><i>Microcotyle odacis</i> was first described and illustrated based on 15 specimens from the gills of <i>Odax semifasciatus</i> (<a href="/facts/Odacidae/cQABPoYa">Odacidae</a>),<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> (currently <i><a href="/facts/Haletta_semifasciata/GLtCAp3f">Haletta semifasciata</a></i>). <a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> It was placed in the nominal subgenus <i>Microcotyle</i> as <i>Microcotyle (Microcotyle) odacis</i>. <a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> However, this combination was later suppressed.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> <i>M. odacis</i> was redescribed and illustrated from the type-host and locality and the original figures and description of the adult morphology were completed. <a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> Some minor differences in measurements and vagina were noted in the redescription. <a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> </p> <h2 id="morphology">Morphology</h2> <p><i>Microcotyle odacis</i> has the general morphology of all species of <i><a href="/facts/Microcotyle/WSlfYQ7a">Microcotyle</a></i>, with an elongated 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, distinctly separated from the rest of the body and bears <a href="/facts/Clamp_(zoology)/9Tw2kxf4">clamps</a>, arranged as two rows, one on each side (28 on the right and 30 on the left). The clamps of the haptor attach the animal to the <a href="/facts/Gill/FWgM3Jp8">gill</a> of the fish. There are also two muscular septated buccal <a href="/facts/Sucker_(zoology)/XGXebc5a">suckers</a> at the anterior extremity. The digestive organs include an anterior, terminal mouth, a subcircular <a href="/facts/Pharynx/51F3eVms">pharynx</a>, an <a href="/facts/Oesophagus/XWa7WoWn">oesophagus</a> bifurcating immediately posterior to the genital atrium and a posterior <a href="/facts/Intestine/nK2zwqBS">intestine</a> with two lateral branches provided with numerous secondary branches; both branches enter the haptor. Each adult contains male and female reproductive organs. The reproductive organs include an anterior genital atrium, armed with numerous <a href="/facts/Spine_(zoology)/JWqp5oJW">spines</a>, a medio-dorsal <a href="/facts/Vagina/ca5jsTwF">vagina</a>, a single incompletely S-shaped <a href="/facts/Ovary/z2hG6bNy">ovary</a> consisting of a convoluted tube and 14 <a href="/facts/Testicle/Doy40hoq">testes</a> which are posterior to the ovary. The eggs are oval, with appendages at both poles. <a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p> <h2 id="hosts-and-localities">Hosts and localities</h2> <p>The type-host is the blue weed-whiting, <i><a href="/facts/Haletta_semifasciata/GLtCAp3f">Haletta semifasciata</a></i> (<a href="/facts/Odacidae/cQABPoYa">Odacidae</a>). The type-locality is off <a href="/facts/Australia/qLHpbppq">Australia</a>. <a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> <i>Microcotyle odacis</i> was reported again from the-host and locality. <a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Sandars, D. F. (1945). Five new microcotylids from fish from Western Australian waters. Journal of the Royal Society of Western Australia, 29, 107-135. <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Sandars, D. F. (1945). Five new microcotylids from fish from Western Australian waters. Journal of the Royal Society of Western Australia, 29, 107-135. <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Froese, R. and D. Pauly. Editors. (2019). FishBase. Odax semifasciatus Valenciennes, 1840. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=315076 on 2019-01-26 <a href="http://www.marinespecies.org/aphia.php?p=taxdetails&id=315076" target="_blank">http://www.marinespecies.org/aphia.php?p=taxdetails&id=315076</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>Dillon, W. A., Hargis Jr, W. J., & Harrises, A. E. (1985). Monogeneans from the southern Pacific Ocean: Polyopisthocotyleids from the Australian fishes. The subfamily Microcotylinae. Zoologicheskiy Zhurnal [1984], 63, (3), 348-359. Translation Series Number 32 of the Virginia Institute of Marine Science, The College of William and Mary, Gloucester Point, Virginia 23062, U.S.A. March, 1985 PDF of English Translation from Russian <a href="http://www.vims.edu/GreyLit/VIMS/trans32" target="_blank">http://www.vims.edu/GreyLit/VIMS/trans32</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Dillon, W. A., Hargis Jr, W. J., & Harrises, A. E. (1985). Monogeneans from the southern Pacific Ocean: Polyopisthocotyleids from the Australian fishes. The subfamily Microcotylinae. Zoologicheskiy Zhurnal [1984], 63, (3), 348-359. Translation Series Number 32 of the Virginia Institute of Marine Science, The College of William and Mary, Gloucester Point, Virginia 23062, U.S.A. March, 1985 PDF of English Translation from Russian <a href="http://www.vims.edu/GreyLit/VIMS/trans32" target="_blank">http://www.vims.edu/GreyLit/VIMS/trans32</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Sandars, D. F. (1945). Five new microcotylids from fish from Western Australian waters. Journal of the Royal Society of Western Australia, 29, 107-135. <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Sandars, D. F. (1945). Five new microcotylids from fish from Western Australian waters. Journal of the Royal Society of Western Australia, 29, 107-135. <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Dillon, W. A., Hargis Jr, W. J., & Harrises, A. E. (1985). Monogeneans from the southern Pacific Ocean: Polyopisthocotyleids from the Australian fishes. The subfamily Microcotylinae. Zoologicheskiy Zhurnal [1984], 63, (3), 348-359. Translation Series Number 32 of the Virginia Institute of Marine Science, The College of William and Mary, Gloucester Point, Virginia 23062, U.S.A. March, 1985 PDF of English Translation from Russian <a href="http://www.vims.edu/GreyLit/VIMS/trans32" target="_blank">http://www.vims.edu/GreyLit/VIMS/trans32</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> </ol>