title: The genital ducts of Theodoxus, Lamellaria and Trivia, and a discussion of their evolution in the prosobranchs.
authors.forename: V
authors.initials: V
authors.lastname: FRETTER
mesh_terms: D000818:Animals; D005075:Biological Evolution; D049851:Gastropoda; D005835:Genitalia / Q000033:anatomy & histology*