Taenia rileyi Loewen, 1929

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, Zootaxa 5357 (2), pp. 205-240 : 214

publication ID

https://doi.org/ 10.11646/zootaxa.5357.2.3

publication LSID

lsid:zoobank.org:pub:A8932459-5A17-4812-8557-B9613DE69CEB

DOI

https://doi.org/10.5281/zenodo.10018008

persistent identifier

https://treatment.plazi.org/id/03D07B6E-FFF5-0E61-E0CB-8C8EFBF5F852

treatment provided by

Plazi

scientific name

Taenia rileyi Loewen
status

 

Taenia rileyi Loewen

(= Taenia lyncis Skinker )

Site of infection: Liver

Host species: Sigmodon toltecus

Locality: Kuncheil ranch (Yucatan)

Specimens deposited: CNHE 11977

Comments: Each cyst contained one small, poorly developed metacestode 1.5‒2.8 mm long (without bladder). The metacestodes examined in this study showed characters which agreed with descriptions given by Mollhagen (1979) from S. hispidus, Rausch (1981) from Myodes rutilus (Pallas) and Tamiasciurus hudsonicus (Erxleben) , and the updated revision of the genus Taenia ( Loos-Frank 2000) , i.e., invaginated scolex with four suckers 140 long by 160 wide and rostellum with 2 crowns of 19‒20 hooks each ( Figure 3E View FIGURE 3 ), longer hooks 240 in length and smaller hooks 190‒205 in length ( Figure 3F View FIGURE 3 ).

While some studies have reported strobilocercus larvae for T. rileyi ( Grundmann 1958; Mollhagen 1979), other studies refer to it as cysticercus ( Mahrt & Soo-Jeet 1972; Mollhagen 1978). There is considerable confusion on the form of larval T. rileyi due to the different levels of development of the strobilization. Since strobilization might easily interpret an evaginated cysticercus of T. rileyi, Mollhagen (1979) suggested not considering it as the sole diagnostic criterion. In Mexico, metacestodes of Hyd. taeniaeformis have also been reported in the liver of cricetid and murid rodents ( Preisser & Falcón-Ordaz 2019; Panti-May et al. 2021). However, the length of large hooks of Hyd. taeniaeformis is larger than those of T. rileyi .

The only record of T. rileyi in Mexico was reported by Flores-Barroeta (1966) in Canis familiaris Linnaeus from Mexico City. Our study reports T. rileyi for the first time in rodents from Mexico.

Kingdom

Animalia

Phylum

Platyhelminthes

Class

Cestoda

SubClass

Eucestoda

Order

Cyclophyllidea

Family

Taeniidae

Genus

Taenia

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