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The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories ( For more information about these ontologies, see the MGI Publications Page at

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Accession:MP:0003445 term browser browse the term
Definition:fusion of the caudal-most (posterior or lower) limbs often with partial or complete fusion of the autopods
Synonyms:exact_synonym: mermaid malformation;   symmelia;   sympus

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Term paths to the root
Path 1
Term Annotations click to browse term
  mammalian phenotype 5417
    limbs/digits/tail phenotype 76
      abnormal limb morphology 67
        abnormal hindlimb morphology 42
          sirenomelia 0
Path 2
Term Annotations click to browse term
  mammalian phenotype 5417
    embryo phenotype 11
      abnormal embryo development 0
        abnormal developmental patterning 0
          abnormal left-right axis patterning 0
            sirenomelia 0
paths to the root