Syphacia peromysci Harkema

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 : 222

Syphacia peromysci Harkema

Site of infection: Caecum and large intestine

Host species: Peromyscus yucatanicus

Localities: Aak ecological park and Kuncheil cattle ranch (Yucatan)

Specimens deposited: CNHE 12024, 12025

Comments: The specimens examined from Yucatan had characteristics described by Kruidenier et al. (1961), Quentin & Kinsella (1972) and Panti-May et al. (2018), i.e., cephalic plate rounded (males) or laterally-elongated (females) ( Figure 5A ); cervical alae present in both males and females ( Figure 5B ); deirids in females, not observed in males; males with three mamelons ( Figure 5C ), spicule 57 long, gubernaculum 27 long, accessory hook with ornamentation, three pairs of caudal papillae surrounding the cloacal region, and tail 60 long ( Figure 5D ); some females with slightly prominent vulva; eggs 93.5–95.9 long by 27.1 wide ( Figure 5E ), and tail 441–509.6 long.

In Mexico, Sy. peromysci has been recorded from Peromyscus sp. , Peromyscus boylii (Baird) , Peromyscus maniculatus (Wagner) , Peromyscus melanotis Allen & Chapman in Chihuahua ( Preisser & Falcón-Ordaz 2019), P. maniculatus in Hidalgo ( Pulido-Flores et al. 2005), P. difficilis in Veracruz ( Falcón-Ordaz et al. 2016), and P. yucatanicus in Yucatan ( Panti-May et al. 2018). Our study adds two new locality records in Yucatan.

Figures

FIGURE 5. A. SEM micrograph of cephalic plate of female Syphacia peromysci from Peromyscus yucatanicus, apical view. B. SEM micrograph of anterior extremity of female Syphacia peromysci from Peromyscus yucatanicus showing the cervical alae (arrow), ventral view. C. SEM micrograph of complete male of Syphacia peromysci from Peromyscus yucatanicus showing the mamelons (arrows), lateral view. D. Caudal extremity of male Syphacia peromysci from Peromyscus yucatancus showing the caudal papillae (arrows), lateral view. E. Egg of Syphacia peromysci from Peromyscus yucatanicus, lateral view. F. Cephalic plate of female Syphacia sp. (1) from Heteromys gaumeri, apical view. G. Egg of Syphacia sp. (1) from Heteromys gaumeri, lateral view. Cephalic plate of female Syphacia sp. (2) from Reithrodontomys gracilis showing the cervical alae (arrow), apical view. I. Egg of Syphacia sp. (2) from Reithrodontomys gracilis, lateral view. J. SEM micrograph of cephalic plate of female Syphacia sp. (3) from Ototylomys phyllotis, apical view. K. Anterior extremity of female Syphacia sp. (3) from Ototylomys phyllotis showing the isthmus (arrow), ventral view. L. SEM micrograph of anterior extremity of Syphacia sp. (3) from Ototylomys phyllotis showing the lateral folds (arrow), lateral view. M. Egg of Syphacia sp. (3) from Ototylomys phyllotis, lateral view. N. SEM micrograph of the anterior section of female Syphacia sp. (4) from Ototylomys phyllotis showing the cuticle with transverse striations and shallow longitudinal depressions, lateral view. O. SEM micrograph of cephalic plate of female Syphacia sp. (4) from Ototylomys phyllotis, apical view. P. Anterior extremity of female Syphacia sp. (4) from Ototylomys phyllotis showing the deirids (arrow), ventral view.