Glossocercus sp.

Fishes (M): Gall-bladder, liver, mesentery.

CHIAPAS: Río Villa Flores: Poecilia mexicana (Salgado-Maldonado et al. 2011) . HIDALGO: Lago de Tecocomulco: Cyprinus carpio (Alemán-García 2009); Laguna de Metztitlán: Chirostoma jordani, Poeciliopsis gracilis (Monks et al. 2005a, b). TABASCO: Pantanos de Centla: Poecilia petenensis (López-Jiménez 2001) .

Specimens in collections: CIB-UAEH (P00005–6).

Birds (A): Intestine.

CAMPECHE: Río Ulumal: Nyctanassa violacea (present study). VERACRUZ: Humedal Los Chivos: Ardea herodias, Nyctanassa violacea (Ortega-Olivares et al. 2008), Egretta tricolor, Nycticorax nycticorax (present study); Laguna La Cortadura, Laguna La Rivera, Río Tecolutla: Nyctanassa violacea (present study); Río Máquinas: Nyctanassa violacea (Ortega-Olivares et al. 2008) .

Specimens deposited: CNHE (6871–3, 6877–9).

Specimens in collections: CNHE (6015–6); IPCAS (C–205/1–2).

Notes: In accordance with Ortega-Olivares et al. (2008) it is possible that tapeworms from Veracruz represent a new species.