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Currently,<jats:italic>Drepanocephalus<\/jats:italic>contains three species, i.e.<jats:italic>D. spathans<\/jats:italic>(type species),<jats:italic>D. olivaceus<\/jats:italic>and<jats:italic>D. auritus.<\/jats:italic>Two additional species,<jats:italic>D. parvicephalus<\/jats:italic>and<jats:italic>D. mexicanus<\/jats:italic>were transferred to the genus<jats:italic>Petasiger<\/jats:italic>. In the current study, available DNA sequences of<jats:italic>D. spathans<\/jats:italic>,<jats:italic>D. auritus<\/jats:italic>and<jats:italic>Drepanocephalus<\/jats:italic>sp., were aligned with newly generated sequences of<jats:italic>D. spathans<\/jats:italic>and<jats:italic>Petasiger mexicanus<\/jats:italic>. Phylogenetic analyses inferred with three nuclear (LSU, SSU and ITS1, 5.8S, ITS2) and two mitochondrial (<jats:italic>cox<\/jats:italic>1,<jats:italic>nad<\/jats:italic>1) molecular markers showed that the sequences of<jats:italic>D. spathans<\/jats:italic>and<jats:italic>D. auritus<\/jats:italic>are nested together in a single clade with very low genetic divergence, with<jats:italic>Petasiger mexicanus<\/jats:italic>as its sister species. Additionally,<jats:italic>P. mexicanus<\/jats:italic>was not a close relative of other members of the genus<jats:italic>Petasiger,<\/jats:italic>showing that<jats:italic>P. mexicanus<\/jats:italic>actually belongs to the genus<jats:italic>Drepanocephalus,<\/jats:italic>suggesting the need to re-allocate<jats:italic>Petasiger mexicanus<\/jats:italic>back into the genus<jats:italic>Drepanocephalus<\/jats:italic>, as<jats:italic>D. mexicanus.<\/jats:italic>Morphological observations of the newly sampled individuals of<jats:italic>D. spathans<\/jats:italic>showed that the position of the testes is variable and testes might be contiguous or widely separated, which is one of the main diagnostic traits for<jats:italic>D. auritus<\/jats:italic>. Our results suggest that<jats:italic>D. auritus<\/jats:italic>might be considered a synonym of<jats:italic>D. spathans<\/jats:italic>and, as a result, the latter represents a species with a wide geographic range across the Americas, parasitizing both the Neotropical and the double-crested cormorant in Argentina, Brazil, Paraguay, Venezuela, Colombia, Mexico, USA and Canada.<\/jats:p>","DOI":"10.1017\/s0022149x17000815","type":"journal-article","created":{"date-parts":[[2017,10,4]],"date-time":"2017-10-04T09:57:46Z","timestamp":1507111066000},"page":"572-595","source":"Crossref","is-referenced-by-count":16,"title":["Multilocus phylogenetic analysis and morphological data reveal a new species composition of the genus<i>Drepanocephalus<\/i>Dietz, 1909 (Digenea: Echinostomatidae), parasites of fish-eating birds in the Americas"],"prefix":"10.1017","volume":"92","author":[{"given":"E.","family":"Hern\u00e1ndez-Cruz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.S.","family":"Hern\u00e1ndez-Orts","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.L.","family":"Sereno-Uribe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G.","family":"P\u00e9rez-Ponce de Le\u00f3n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Garc\u00eda-Varela","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2017,10,4]]},"reference":[{"key":"S0022149X17000815_ref30","doi-asserted-by":"publisher","DOI":"10.1645\/GE-2775.1"},{"key":"S0022149X17000815_ref15","doi-asserted-by":"publisher","DOI":"10.1007\/s11230-012-9354-y"},{"key":"S0022149X17000815_ref37","doi-asserted-by":"publisher","DOI":"10.7589\/2012-10-249"},{"key":"S0022149X17000815_ref53","doi-asserted-by":"publisher","DOI":"10.1017\/S0022149X14000297"},{"key":"S0022149X17000815_ref4","first-page":"19","article-title":"Intento de un cat\u00e1logo de los trem\u00e1todos dig\u00e9neos registrados en territorio venezolano","volume":"18","author":"Caballero Caballero","year":"1958","journal-title":"Memoria de la Sociedad de Ciencias Naturales La Salle"},{"key":"S0022149X17000815_ref59","first-page":"103","article-title":"Endoparasites of the double-crested cormorant (Phalacrocorax auritus) in Florida","volume":"49","author":"Threlfall","year":"1982","journal-title":"Proceeding of the Helminthological Society of Washington"},{"key":"S0022149X17000815_ref13","doi-asserted-by":"publisher","DOI":"10.1645\/GE-523R.1"},{"key":"S0022149X17000815_ref46","first-page":"241","article-title":"Algunos trem\u00e1todos de vertebrados de la Presa Miguel Alem\u00e1n, en Temascal, Oaxaca, M\u00e9xico","volume":"66","author":"Ramos-Ramos","year":"1995","journal-title":"Anales del Instituto de Biolog\u00eda Universidad Nacional Autonoma de M\u00e9xico"},{"key":"S0022149X17000815_ref41","doi-asserted-by":"publisher","DOI":"10.1155\/2014\/807492"},{"key":"S0022149X17000815_ref3","doi-asserted-by":"publisher","DOI":"10.1016\/0166-6851(93)90199-8"},{"key":"S0022149X17000815_ref40","first-page":"309","volume-title":"Estudio del control sanitario de la piscifactor\u00eda Benito Ju\u00e1rez y en los vasos de las presas la Angostura y Malpaso","author":"Pineda-L\u00f3pez","year":"1985"},{"key":"S0022149X17000815_ref2","doi-asserted-by":"publisher","DOI":"10.1016\/S0020-7519(01)00357-5"},{"key":"S0022149X17000815_ref21","first-page":"75","article-title":"Fauna helmintol\u00f3gica de Cichlasoma fenestratum (Pisces: Cichlidae) del Lago de Catemaco. 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