Ibirhynchus dimorpha ( Schmidt, 1973 ) García-Varela, Pérez-Ponce

Ortega-Olivares, Mirza P., Hernández-Mena, David I., León, Gerardo Pérez-Ponce De & García-Varela, Martín, 2011, Helminths of the white ibis, Eudocimus albus (Aves: Therskiornithidae) in Mexico., Zootaxa 3088, pp. 15-26 : 19

Ibirhynchus dimorpha ( Schmidt, 1973) García-Varela, Pérez-Ponce de León, Aznar & Nadler, 2011

( Fig. 7 )

Localities. VERACRUZ: Humedal los Chivos and Lago de Catemaco.

Specimens deposited. CNHE 6164.

Remarks. Southwellina dimorpha was transferred by García-Varela et al. (2011) to the newly described genus Ibirhynchus based on morphological and molecular characters. The specimens collected in this study exhibit the diagnostic characters of this species, i.e., a short and barrel-shaped proboscis armed with 17 to 24 longitudinal circles of 9 to 14 hooks each. In addition, our specimens show sexual dimorphism in terms of spine distribution in the anterior region of the trunk. The females are characterized by possessing a single field of spines whereas the males have 2 fields. Ibirhynchus dimorpha has been previously reported in the white ibis in localities of Florida and Mexico ( Schmidt 1973; Forrester & Spalding 2003; Richardson & Font 2006; García-Varela et al. 2011), and in the whooping crane Grus americana (Linnaeus) in Florida ( Richardson & Font 2006).

Figures

FIGURES 7 – 8. 7. Male of Ibirhynchus dimorpha Schmidt, 1973. 8. Male of Arhythmorhynchus frassoni Molin, 1858. Scale bars = 1 mm.