Horizontal tooth replacement in the Amazonian manatee (Trichechus inunguis)

  title={Horizontal tooth replacement in the Amazonian manatee (Trichechus inunguis)},
  author={Daryl Domning and L. C. Hayek},
Le lamantin a des molaires surnumeraires en nombre illimite qui se remplacent d'arriere en avant au cours de la vie de l'animal. Le processus de remplacement s'adapte automatiquement a la durete des aliments, la vitesse d'usure des dents etant regulee par l'adaptation de leur morphologie 

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Beiträge zur Kenntnis der Morphologie und postembryonalen Entwicklung des Schädels bei Manatus inunguis Natt
  • Morph. Jb.,
  • 1909
Note sommaire sur la denture d'un jeune lamantin (Trichechus senegalensis)
  • Bull. Inst. Franc. Afr. Noire, ser. A,
  • 1955
Comparative anatomy of tooth-movement during growth of the jaws
  • Dent. Rec.,
  • 1953
Notes sur la dentition des sireniens. I. La formule dentaire du lamantin (Trichechus)
  • Bull. Mus. r. Hist. nat. Belgique,
  • 1941
Kausale Studien zum ontogenetischen und phylogenetischen Geschehen am Kiefer mit besonderer Berücksichtigung von Elephas und Manatus
  • Abh. Akad. Wiss. Berlin,
  • 1918