title: First record of dicephalia in a bull shark Carcharhinus leucas (Chondrichthyes: Carcharhinidae) foetus from the Gulf of Mexico, U.S.A.
abstract: The first recorded incidence of dicephalia in a bull shark Carcharhinus leucas is reported from a foetus collected by a fisherman in the Gulf of Mexico near Florida, U.S.A. External examination, Radiography and magnetic resonance imaging revealed a case of monosomic dicephalia where the axial skeleton and internal organs were found to divide into parallel systems anterior to the pectoral girdle resulting in two well-developed heads.
authors.affiliation: Michigan State University, Department of Fisheries and Wildlife, East Lansing, MI 48824, USA. mwagner@msu.edu
authors.forename: C M
authors.initials: CM
authors.lastname: Wagner
authors.forename: P H
authors.initials: PH
authors.lastname: Rice
authors.forename: A P
authors.initials: AP
authors.lastname: Pease
mesh_terms: D000818:Animals; D004625:Embryo, Nonmammalian / Q000002:abnormalities / Q000000981:diagnostic imaging; D060851:Gulf of America; D006257:Head / Q000002:abnormalities* / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D011859:Radiography; D012754:Sharks / Q000033:anatomy & histology*