title: Cyclostome models for speculation on evolution of vertebrate endocrine systems.
authors.affiliation: Department of Zoology, University of Washington, Seatle 98195.
authors.forename: A
authors.initials: A
authors.lastname: Gorbman
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004702:Endocrine Glands; D005399:Fishes / Q000196:embryology / Q000502:physiology; D008954:Models, Biological; D012098:Reproduction / Q000502:physiology; D012733:Sex Differentiation / Q000502:physiology