Syphacia obvelata (Rudolphi)

Panti-May, Jesús Alonso, Digiani, María Celina, Palomo-Arjona, Eduardo Emir, Gurubel-González, Yessica Margely, Navone, Graciela T., Machain-Williams, Carlos, Hernández-Betancourt, Silvia F. & Robles, María Del Rosario, 2018, A checklist of the helminth parasites of sympatric rodents from two Mayan villages in Yucatán, México, Zootaxa 4403 (3), pp. 495-512 : 504-505

Syphacia obvelata (Rudolphi)

(= Ascaris obvelata Rudolphi ; = Fusaria obvelata Zeder ; = Oxyuris obvelata Bremser ; = Oxyuris stroma Linstow )

Site of infection: Caecum and large intestine

Host: Mus musculus

Locality: Paraíso

Prevalence and mean intensity (range): 3.8% (6/159) and 31.5 (6–90)

Specimens deposited: MLP-He 7434 and CNHE 10708

Comments: The characteristics observed in the specimens agreed with those described by Khalil et al. (2014) and Abdel-Gaber (2016), i.e. rounded cephalic plate; amphids located medial to the submedian papillae; slight lateral alae present only in females; males with three mamelons, spicule 81–82 long, gubernaculum 32–33 long, accessory hook without ornamentation, three pairs of caudal papillae surrounding the cloacal region, and tail 134– 135 long; females with slightly prominent vulva, tail 417–600 long, and eggs 120–137 long by 37–41 wide.

In México, S. obvelata has been reported from M. musculus in Hidalgo (Pulido-Flores et al. 2005) and Tabasco ( Cigarroa-Toledo et al. 2017), and R. norvegicus in Tabasco ( Cigarroa-Toledo et al. 2017).

In Yucatán, S. obvelata has been previously recorded from O. phyllotis in Chichen Itzá (aproximately 162 km from this new locality record, Chitwood 1938) and M. musculus in Opichén (Panti-May et al. 2017) .