Carolinensis sp.

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 : 219

Carolinensis sp.

Site of infection: Small intestine

Host species: Peromyscus yucatanicus

Localities: Dzununcan farm, Aak ecological park, Papam ranch, Kuncheil cattle ranch (Yucatan) and Jolie Jungle eco-hotel (Quintana Roo)

Specimens deposited: CNHE 12010‒12013

GenBank accession numbers: OR271666, OR271680

Comments: The morphological characters observed in the synlophe and the caudal bursa of the specimens agree with the description of the genus Carolinensis ( Durette-Desset 2009) . Our specimens had a synlophe with 16 ridges at midbody in both sexes ( Figure 4F); subsymmetrical bursa with rays 8 arising from base of dorsal ray; bifid extremities of dorsal ray; and spicules 210–285 long, characters shared with Carolinensis peromysci (Durette-Desset) . However, our specimens exhibit some differences, such as a pattern of type 1-4 t 1-3-1, the level of divergence of the dorsal ray (second half) and the spicule tips (curved). The latter two features are similar to those reported in Carolinensis dikmansi (Durette-Desset) but this species had a larger spicule (370) and a well-developed genital cone. Based on these differences, we cannot assign Carolinensis to the species level.

This finding expands the geographical distribution of Carolinensis to Quintana Roo.