Helminths of small rodents (Heteromyidae and Cricetidae) in the Yucatan Peninsula, Mexico: an integrative taxonomic approach to their inventory Author Panti-May, Jesús Alonso Centro de Investigaciones Regionales “ Dr. Hideyo Noguchi ”, Universidad Autónoma de Yucatán, Mérida, Yucatán, México. Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, México. Author Moguel-Chin, Wilson Isaias 0000-0002-2564-4086 wilson-im @ hotmail. com; https: // orcid. org / 0000 - 0002 - 2564 - 4086 wilson-im@hotmail.com Author Hernández-Mena, David Iván 0000-0003-0822-3498 Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mérida, Yucatán, México & dahernandez. 243 @ gmail. com; https: // orcid. org / 0000 - 0003 - 0822 - 3498 dahernandez.243@gmail.com Author Cárdenas-Vargas, Miguel Humberto 0009-0003-3622-6351 miguel. carvar 23 @ gmail. com; https: // orcid. org / 0009 - 0003 - 3622 - 6351 miguel.carvar23@gmail.com Author Torres-Castro, Marco 0000-0002-8295-0100 Centro de Investigaciones Regionales “ Dr. Hideyo Noguchi ”, Universidad Autónoma de Yucatán, Mérida, Yucatán, México. Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, México. & antonio. torres @ correo. uady. mx; https: // orcid. org / 0000 - 0002 - 8295 - 0100 antonio.torres@correo.uady.mx Author García-Prieto, Luis 0000-0002-7529-1514 Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México, México. & luis. garcia @ ib. unam. mx; https: // orcid. org / 0000 - 0002 - 7529 - 1514 luis.garcia@ib.unam.mx Author Digiani, Maria Celina 0000-0002-1626-9309 CONICET. División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Argentina & mdigiani @ fcnym. unlp. edu. ar; https: // orcid. org / 0000 - 0002 - 1626 - 9309 mdigiani@fcnym.unlp.edu.ar Author Hernández-Betancourt, Silvia F. 0000-0001-7302-9582 hbetanc @ correo. uady. mx; https: // orcid. org / 0000 - 0001 - 7302 - 9582 hbetanc@correo.uady.mx Author Vidal-Martínez, Víctor Manuel 0000-0002-6829-6317 Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mérida, Yucatán, México & vvidal @ cinvestav. mx; https: // orcid. org / 0000 - 0002 - 6829 - 6317 vvidal@cinvestav.mx text Zootaxa 2023 2023-10-18 5357 2 205 240 http://dx.doi.org/10.11646/zootaxa.5357.2.3 journal article 10.11646/zootaxa.5357.2.3 1175-5326 10017978 A8932459-5A17-4812-8557-B9613DE69CEB Hydatigera taeniaeformis (Batsch) (= Taenia taeniaeformis Batsch ; = Taenia infantis Bacigalupo ) Site of infection: Liver Host species: Sigmodon toltecus Locality: Zoh Laguna community ( Campeche ) Specimens deposited: CNHE 11976 GenBank accession number: OR271655 Comments: Each cyst contained one metacestode (strobilocercus). All the specimens collected in this study showed characteristics that agreed with descriptions given by Jones & Pybus (2001) and Panti-May et al . (2018) from Rattus rattus Linnaeus and S . toltecus , i.e., scolex with four suckers, 303.9 long by 274.4 wide, and rostellum with 2 crowns of 18 hooks each, different in size ( Figure 3C ), longer hooks 360–400 in length and smaller hooks 230 in length ( Figure 3D ). In Mexico , Hyd . taeniaeformis has been reported from commensal rodents Mus musculus Linnaeus , Rat . rattus and Rattus norvegicus (Berkenhout) in several states (see Panti-May et al . 2021 ). In wild rodents, this cestode has been reported from S. hispidus in Nuevo León (Gutiérrez-González 1980) and S . toltecus and Sciurus yucatanensis Allen in Yucatan ( Panti-May et al. 2018 , 2019 ). This is the first record of Hyd . taeniaeformis in Campeche .