title: The eggs of European water frogs (Rana esculenta complex) and their hybrids.
mesh_terms: D000818:Animals; D001001:Anura / Q000033:anatomy & histology*; D005260:Female; D006824:Hybridization, Genetic; D010058:Oviposition; D010063:Ovum; D010641:Phenotype; D011893:Rana esculenta / Q000033:anatomy & histology