Mediorhynchus sp.

Mediorhynchus sp.

Infection site: Mesentery

Locality: Homún

Prevalence (%) and mean intensity: Homún: 0.8 and 1 (1)

Specimen deposited: CNHE-12326

Comments: Based on one encysted juvenile with partially everted proboscis ( Figure 11A, B View FIGURE 11 ). Proboscis in two parts. Anterior proboscis slightly oval, 300 × 200, with ca. 20 irregularly arranged longitudinal rows, each with 14 hooks ( Figure 11B View FIGURE 11 ). Hooks 23‒25 long. Posterior proboscis partially retracted, longitudinal rows of spines not counted. Spines 12‒14 long. Trunk smooth, cylindrical, slightly swollen at posterior end, 1650 in length and 650 in maximum width. Pseudo-segmentation, proboscis receptacle and reproductive organs are not observed.

The specimen was not alive and consequently its preparation for examination was not ideal. However, the morphological data observed in our specimen, particularly the irregularly arrangement of the longitudinal rows of hooks and the proboscis armature, fit with the genus Mediorhychus ( Schmidt & Kuntz 1977) . In Mexico, a juvenile stage of Mediorhynchus has been recorded from M. waterhousii in Michoacán ( Luviano-Hernández et al. 2018). This is the first record of Mediorhynchus for N. laticaudatus .