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Fig. 1.
A) Image of one of the specimens (Nasua narica) collected on the Mérida-Cancún highway, Mexico. B) The aspect of the nematodes (arrow) collected in the heart. It can be seen that they are worms with elongated, cylindrical, and non-segmented bodies with bilateral symmetry.
Fig. 2.
Phylogenetic reconstruction based on a partial fragment of the 18S-rRNA gene of several nematode species inferred by Maximum Likelihood and based on the Kimura two parameter Model (K2) with Gamma distribution (+G). Bootstrap values are indicated at the nodes. The scale bar at the bottom represents the degree of divergence.