First record of Ozolaimus cirratus (Oxyuroidea: Pharyngodonidae) infecting casque-headed tree frog Corythomantis greeningi (Anura: Hylidae) from Northeastern Brazil

Abstract

Abstract The Ozolaimus genus is characterized by presenting a dorsoventrally elongated mouth, with two lateral lips, a long esophagus, consisting of a strong anterior portion, a short with a fusiform fold, and a thin posterior portion ending in a distinct bulb, anteriorly dilated intestine, and absent lateral wings. Between February 2014 and September 2016, eleven specimens of the anuran Corythomantis greeningi were collected manually in the Ecological Station of Aiuaba, Ceará State, Brazil. After analyses, nine specimens of Ozolaimus cirratus infecting the large intestine of the referred specimen were recorded. Knowledge is still scarce about the ecological dynamics of pharyngodonid parasites and their parasite-host relationships, thus this work is the first to record of Ozolaimus genus infecting the casque-headed tree frog Corythomantis greeningi from Caatinga biome, Ceará State, Brazil. Priviously, the only registered hosts of Ozalaimus parasites were iguanid lizards.