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A morphologic study was made using stained material under light microscopy. Some specimens of a second species (collected in <jats:italic>Sceloporus grammicus<\/jats:italic> from La Malinche, Tlaxcala, fixed in 100% ethanol, were also stained and studied morphologically; others were subject of DNA sequencing and phylogenetic analysis.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>A new species of this genus is described of the intestine of an endemic lizard <jats:italic>S. ochoterenae<\/jats:italic>. <jats:italic>Oochoristica guerreroensis<\/jats:italic> n. sp. shares a distinctive morphological feature (mature proglottids wider than long) with only 13 species of genus. However, <jats:italic>O. guerreroensis<\/jats:italic> n. sp. can be differentiated by: strobilar size (4.29\u20137.62\u00a0mm), number of testes (48\u201355), shape of vitellaria (ovoid) and number of ovarian sublobes (3\u20135), as well as by their geographical distribution (Neotropical region of Mexico), and type of host. Based on molecular evidence of nuclear 28<jats:italic>S rDNA<\/jats:italic> gene, we analyze for the first time the phylogenetic position of one species of <jats:italic>Oochoristica<\/jats:italic> (<jats:italic>O. scelopori<\/jats:italic>) within Anoplocephalidae as well as their relationships with other genera of Cyclophyllidea.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>The new species is the first described in association with a phrynosomatid lizard in the Neotropical realm, and the ninth recorded in Mexico. Molecular data obtained in our study seem to confirm the independence <jats:italic>Oochoristica<\/jats:italic> and <jats:italic>Mathevotaenia<\/jats:italic>.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s11686-025-01046-7","type":"journal-article","created":{"date-parts":[[2025,5,16]],"date-time":"2025-05-16T05:46:20Z","timestamp":1747374380000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["New Species of Oochoristica L\u00fche, 1898 (Cestoda: Linstowiinae) from Sceloporus ochoterenae (Reptilia: Sauria: Phrynosomatidae) in Central Mexico: Approach to the Phylogenetic Relationships of the Genus with Molecular Evidence"],"prefix":"10.1007","volume":"70","author":[{"given":"Andr\u00e9s","family":"Vel\u00e1zquez-Brito","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis","family":"Garc\u00eda-Prieto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Uriel Gardu\u00f1o-Montes","family":"de Oca","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Virginia","family":"Le\u00f3n-R\u00e8gagnon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,5,16]]},"reference":[{"key":"1046_CR1","first-page":"77","volume-title":"Planetary biodiversity inventory (2008\u20132017): tapeworms from vertebrate bowels of the Earth","author":"J Mariaux","year":"2017","unstructured":"Mariaux J, Tkach VV, Vasileva GP, Waeschenbach A, Beveridge I, Dimitrova YD, Haukisalmi V, Greiman SE, Littlewood DTJ, Makarikov AA, Phillips AJ, Razafiarisolo T, Widmer V, Georgiev BB (2017) Cyclophyllidea Van Beneden in Braun, 1900. 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(Cestoda: Linstowiidae) from Anolis gingivinus (Sauria: Polychrotidae) Collected in Anguilla, Lesser Antilles"],"short-title":[],"issued":{"date-parts":[[2025,5,16]]},"references-count":28,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2025,6]]}},"alternative-id":["1046"],"URL":"https:\/\/doi.org\/10.1007\/s11686-025-01046-7","relation":{},"ISSN":["1230-2821","1896-1851"],"issn-type":[{"value":"1230-2821","type":"print"},{"value":"1896-1851","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,5,16]]},"assertion":[{"value":"7 March 2025","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"29 April 2025","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"16 May 2025","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"All applicable international, national, and institutional guidelines for the ethical handling of animals and for collection of zoological material were followed. Hosts were collected under permits SEMARNAT FAUT-0056 and SCPA\/DGVS\/03184\/22 by Secretar\u00eda de Medio Ambiente y Recursos Naturales, Mexico, issued to VLR and Fausto M\u00e9ndez.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical Approval"}},{"value":"Manuscript submitted to this journal was neither send to another journal nor any part of it has been published or is being considered for publication elsewhere in any form.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Manuscript Submission"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing Interests"}}],"article-number":"106"}}