Vexillata vexillata (Hall)

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 : 217

Vexillata vexillata (Hall)

(= Heligmosomum vexillatum Hall )

Site of infection: Small intestine

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, Balam Nah eco-hotel, and David Gustavo community (Quintana Roo)

Specimens deposited: CNHE 11991‒12004

GenBank accession numbers: OR271662‒ OR271664, OR271674, OR271678, OR271681

Comments: The characteristics observed in all specimens examined from the Yucatan Peninsula were in accordance with the original description by Hall (1916) of parasites from Thomomys talpoides fossor (Allen) , the redescriptions by Sanabria Espinosa et al. (1996) from H. irroratus and Peromyscus difficilis (Allen) and Durette-Desset (1978) from Chaetodipus hispidus (Baird) , and a recent report by Panti-May et al. (2018) from H. gaumeri . All males had a synlophe with well-developed careen; 12 cuticular ridges in the synlophe at midbody ( Figure 4C ); subsymmetrical bursa with a pattern of type 2-2-1; dorsal ray with two small and asymmetric accessory branches starting about its mid-length; rays 8 arising from base of dorsal ray and similar in length to it; dorsal ray with bifid extremities ( Figure 4D ); simple genital cone; and simple spicules 300–425 long.

Vexillata vexillata has been reported from H. pictus in Chiapas (Caballero y Caballero 1958), H. irroratus and P. difficilis in Hidalgo ( Sanabria Espinosa et al. 1996; Falcón-Ordaz & Sanabria Espinosa 1997), H. irroratus in Morelos ( Ortíz 1999), and H. gaumeri in Yucatan ( Panti-May et al. 2018). This is the first record of V. vexillata in Campeche and Quintana Roo, extending its geographical range.

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.