Raillietina sp. (2) Site of infection: Small intestine Host species: Heteromys gaumeri and Sigmodon toltecus Localities: Vallazoo, Kuncheil cattle ranch (Yucatan), Ich ha lol xaan ecological park and Zoh Laguna community (Campeche) Specimens deposited: CNHE 10970, 10971, 11972‒11974 GenBank accession numbers: OR271649‒ OR271651 Comments: The specimens were identified as Raillietina by the morphological features mentioned above. Raillietina sp. (2) differs from Raillietina sp. (1) as to the number (91–93 vs 72‒80) and length (21–25 vs 16‒20 anterior and 24–30 vs 19‒22.5 posterior) of rostellar hooks. Because most specimens were immature and large sections of the strobila (mature and gravid proglottids) from mature specimens were in poor condition, detailed measurements of the reproductive structures could not be taken. Nevertheless, the characteristics of the hooks, and genetic distances and phylogeny (see results below) indicate that two species of Raillietina parasitize small rodents in the Yucatan Peninsula.

Published as part of Panti-May, Jesús Alonso, Moguel-Chin, Wilson Isaias, Hernández-Mena, David Iván, Cárdenas-Vargas, Miguel Humberto, Torres-Castro, Marco, García-Prieto, Luis, Digiani, Maria Celina, Hernández-Betancourt, Silvia F. & Vidal-Martínez, Víctor Manuel, 2023, Helminths of small rodents (Heteromyidae and Cricetidae) in the Yucatan Peninsula, Mexico: an integrative taxonomic approach to their inventory, pp. 205-240 in Zootaxa 5357 (2) on page 213, DOI: 10.11646/zootaxa.5357.2.3, http://zenodo.org/record/10017978