Checklist of nematode parasites of amphibians from Argentina Author González, Cynthya Elizabeth Author Inés, Hamann Monika text Zootaxa 2015 3980 4 451 476 journal article 10.11646/zootaxa.3980.4.1 fef1ad43-8b51-4e6b-a642-6e81c678d538 1175-5326 233431 F6823A76-8DE0-4C57-86E8-5A7564CB2A62 Contracaecum Railliet and Henry, 1912 (= Amphicaecum Walton, 1927 ; = Cerascaris Cobb, 1929 ; Contracaecum ( Ornitocaecum ) Mozgovoi, 1951 ; = Contracaecum ( Synthetonema ) Kreis, 1952 ; = Kathleena Leiper and Atkinson, 1914 ) Contracaecum sp. (larvae) Host and record: Dendropsophus nanus (Boulenger, 1889) (= Hyla nana ) (Co), Lithobates catesbeianus (Shaw, 1802) (Sj) . Site of infection: Mesentery, gastric serous membrane. Material deposited: CECOAL 13111101 ( L. catesbeianus ). References : Hamann & Kehr (1998) , González et al. (2014). Life cycle: Species of the genus Contracaecum do not reach maturity in frogs. These species requires an intermediate host (aquatic invertebrates or fishes) to complete its cycle; the definitive hosts are piscivorous birds and aquatic mammals ( Anderson 2000 ).