Trichuris silviae Panti-May & Robles

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 : 216

Trichuris silviae Panti-May & Robles

Site of infection: Caecum

Host species: Heteromys gaumeri

Localities: Hobonil ranch, Molas farm, Dzununcan farm, San Francisco cattle ranch, Santa Cruz cattle ranch, Vallazoo, Aak ecological park, Papam ranch, Kuncheil cattle ranch (Yucatan), Ich ha lol xaan ecological park, Zoh Laguna community (Campeche), Jolie Jungle eco-hotel, and David Gustavo community (Quintana Roo)

Specimens deposited: CNHE 11978‒11989

GenBank accession numbers: OR271656‒ OR271660

Comments: The specimens examined in this study had characteristics described by Panti-May & Robles (2016) of whipworms from H. gaumeri , i.e., males with spicular tube; spicule 1020–1762 long; proximal cloacal tube 850– 1925 long, united laterally to a distal cloacal tube 412– 855 long; cylindrical (or slightly campanulate at apical end; Figure 4A ) and spiny spicular sheath; females with non-protrusive vulva and eggs 52–60 long by 28–32 wide.

Trichuris silviae has been reported from H. gaumeri in Merida, Tzucacab ( Panti-May & Robles 2016) and Xkalakdzonot ( Panti-May et al. 2018), Yucatan. These new records expand the geographical distribution of Tr. silviae to Campeche and Quintana Roo.

Figures

FIGURE 4. A. Posterior end of male specimen of Trichuris silviae from Heteromys gaumeri showing the slightly campanulate spicular sheath (arrow), lateral view. B. SEM micrograph of the anterior extremity of Monodontus sp. from Sigmodon toltecus showing the mouth opening, paired cutting plates and cervical papillae (arrow), ventral view. C. Cross section at midbody showing features of the synlophe of female Vexillata vexillata from Heteromys gaumeri. D. Male caudal bursa of Vexillata vexillata from Heteromys gaumeri, ventral view. E. Cross section at midbody showing features of the synlophe of male Heligmosomoidea gen. sp. cf. Vexillata from Ototylomys phyllotis. F. Cross section at midbody showing features of the synlophe of female Carolinensis sp. from Peromyscus yucatanicus. G. Cross section at midbody showing features of the synlophe of male Hassalstrongylus aduncus from Sigmodon toltecus. H. Cross section at midbody showing features of the synlophe of female Hassalstrongylus musculi from Oligoryzomys fulvescens. I. Male caudal bursa of Hassalstrongylus musculi from Ototylomys phyllotis, dorsal view. J. SEM micrograph of female Heligmostrongylus sp. from Peromyscus yucatanicus showing the discontinuous ridges, lateral view. K. Male caudal bursa of Heligmostrongylus sp. from Peromyscus yucatanicus, ventral view. L. Cross section at midbody of female Heligmonellidae gen. sp. from Sigmodon toltecus showing the absence of synlophe. Abbreviations: r, right side; v, ventral side. All cross sections of the synlophe orientated as in figure C.