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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

Term:decreased otolith number
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Accession:MP:0003144 term browser browse the term
Definition:reduced average number of the crystalline calciferous particles adhering to the otolithic membrane
Synonyms:exact_synonym: decreased number of otoliths;   decreased otoconial crystal number;   reduced number of otoconia;   reduced number of otoliths;   reduced otolith number

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absent otoliths term browser
Symbol Object Name Evidence Notes Source PubMed Reference(s) RGD Reference(s) Position
G Cyba cytochrome b-245 alpha chain IAGP DNA:deletion:splice junction: RGD PMID:19406829 RGD:11040542 NCBI chr19:50,487,598...50,495,669
Ensembl chr19:50,487,597...50,495,721
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G Cybam1Sdi cytochrome b-245 alpha chain;mutant 1,Sdi IAGP DNA:deletion:splice junction: RGD PMID:19406829 RGD:11040542

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  mammalian phenotype 5415
    hearing/vestibular/ear phenotype 23
      abnormal ear morphology 12
        abnormal inner ear morphology 11
          abnormal membranous labyrinth morphology 11
            abnormal vestibular labyrinth morphology 3
              abnormal otolithic membrane morphology 3
                abnormal otolith morphology 3
                  decreased otolith number 3
                    absent otoliths 3
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