Hassalstrongylus musculi (Dikmans)

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 : 220

Hassalstrongylus musculi (Dikmans)

(= Longistriata musculi Dikmans )

Site of infection: Small intestine

Host species: Ototylomys phyllotis and Oligolyzomys fulvescens

Localities: Ich ha lol xaan ecological park (Campeche)

Specimens deposited: CNHE 12014, 12015

GenBank accession numbers: OR271667, OR271668

Comments: The characteristics observed in our material agreed with those described by Dikmans (1935), the re-description by Durette-Desset (1974) and by Panti-May et al. (2018) of parasites from M. musculus , i.e., 24 cuticular ridges in the synlophe at midbody ( Figure 4H ); slightly dissymmetrical bursa with right lobe larger than left, with pattern of type 1-3-1; rays 8 stout and longer than the dorsal ray; dorsal ray divided in its second third ( Figure 4I ); spicules 400–430 long with typical foot shaped tips; and gubernaculum absent.

In Mexico, Ha. musculi has been recorded from Ol. fulvescens , Or. couesi , and Handleyomys melanotis Thomas in San Luis Potosí ( Underwood et al. 1986) and M. musculus in Yucatan ( Panti-May et al. 2018, 2021). Hassalstrongylus musculi is reported for the first time in Campeche and for O. phyllotis .

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.