Dentition and dentigerous bones in juveniles and adults of Polypterus senegalus (Cladistia, Actinopterygii)

Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft
Günter ClemenK Wacker

Abstract

Tooth types, their arrangement and the mode of tooth replacement were studied in juvenile and adult specimens of Polypterus senegalus by means of scanning electron microscopy of cleared and stained specimens as well as sections. All the dermal bones of the oropharynx are almost completely covered with teeth except for the angulare. The same is true for the branchial apparatus where only the hyoid skeleton is toothless. The teeth are uniformly monocuspid and conical, but can be classified according to shape and size into three types. These types and the mode of tooth replacement are characteristic for each dermal bone. In some of the jaw bones each tooth possesses a lingually situated replacement tooth. This is true for the teeth of the premaxillary, the maxillary, and the dentary which are arranged in a single line, and those of the dermopalatine, the coronoids, and the vomer which are in several lines and graded in size. Replacement teeth of all the other dentigerous elements develop on top of existing pulpal openings, forming an anastomosing common pulpal complex only after resorption of the previous tooth. The tooth plates of the dermal bones of the branchial apparatus are connected by syndesmosis only to the perichondrally ...Continue Reading

References

May 1, 1980·The Journal of Cell Biology·J W Jarvik, J L Rosenbaum
Feb 1, 1997·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·H GrevenG Clemen
Apr 1, 1997·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·G ClemenH Greven

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Citations

Jun 4, 2014·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Sam VandenplasAnn Huysseune
Jun 1, 2005·Biological Reviews of the Cambridge Philosophical Society·Johanson Zerina, Moya M Smith
Mar 20, 2015·Proceedings. Biological Sciences·Moya M SmithGareth J Fraser
May 14, 2011·Journal of the Mechanical Behavior of Biomedical Materials·Juha SongMary C Boyce
Jun 13, 2014·Scientific Reports·Brian ChooYou'an Zhu
Feb 24, 2001·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·K WackerG Clemen
Oct 28, 2006·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Jean Joss, Zerina Johanson
Jun 26, 2003·Evolution & Development·Moya Meredith Smith
Jun 30, 2006·Evolution & Development·Per Erik AhlbergZerina Johanson
Aug 3, 2007·Nature·Hector BotellaPhilippe Janvier
May 8, 2021·Nature Ecology & Evolution·Martin RücklinPhilip C J Donoghue
Oct 15, 2021·Biological Reviews of the Cambridge Philosophical Society·Ann HuysseuneP Eckhard Witten

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