title: A dicephalic monster embryo ofDrosophila melanogaster.
abstract: A monster embryo with a head on each end developed from an abnormalDrosophila egg produced by a M(1)oSp/Binsn female. The embryo probably represents a longitudinal mirror duplication of head and all 3 thoracic segments. The significance of this type of pattern anomaly for embryonic pattern specification inDrosophila is discussed.
authors.affiliation: Biol. Institut I (Zoologie) der Albert-Ludwigs-Universität, Katharinenstr. 20, D-7800, Frelburg i.Br, FRG.
authors.forename: Margit
authors.initials: M
authors.lastname: Lohs-Schardin
authors.affiliation: Biol. Institut I (Zoologie) der Albert-Ludwigs-Universität, Katharinenstr. 20, D-7800, Frelburg i.Br, FRG.
authors.forename: Klaus
authors.initials: K
authors.lastname: Sander