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.