Turgida turgida (Rudolphi)

Sites of infection: Esophagus and stomach.

Host species: Didelphis virginiana.

Localities: Umán, Mérida (Yucatán), Campeche, and Chencoh (Campeche).

Prevalence: 100% (6/6).

Mean intensity: 14.8 (range 2‒33).

Specimens deposited: CNHE 12884‒12887.

GenBank accession numbers: PP662463‒PP662465.

Comments: The specimens conformed to the descriptions of T. turgida by Gray & Anderson (1982) and Matey et al. (2001). The nematodes with oral opening surrounded laterally by two symmetrical, semidomed pseudolabia; each pseudolabia composed of a single external tooth, a single tripartite tooth, an amphid, two papillae, and two spongelike areas (Figure 5A). Ventral surface of the male tail with 21 caudal papillae (three precloacal papillae, four pairs of externolateral papillae associated with the caudal alae, five pairs of postcloacal papillae, the first and second pairs are located directly behind the cloaca in a transverse row) and two phasmids (Figure 5B). Male body length 13,240 ‒38,095. Spicules unequal in length, right 242‒330 long, left 280‒380. Female body length 21,030‒27805. Females with nine uterine branches (Figure 5C). Eggs ovoid 42‒50 by 20‒22 wide.

Turgida turgida has been widely reported from D. marsupialis, D. virginiana and P. vossi in Mexico, including the states of Campeche, Chiapas, Colima, Guanajuato, Guerrero, Hidalgo, Jalisco, Michoacán, Mexico City, Mexico State, Morelos, Nayarit, Nuevo León, Oaxaca, Puebla, Tabasco, Veracruz, and Zacatecas (see García-Prieto et al. 2012; Acosta-Virgen et al. 2015; Ramírez-Cañas et al. 2019; García-Valle et al. 2023). This is the first record of T. turgida in Yucatán.