THE HYOID OF NEOCERATODUS AND A CONSIDERATION OF ITS HOMOLOGY IN URODELE AMPHIBIA
Article first published online: 20 AUG 2009
1963 The Zoological Society of London
Proceedings of the Zoological Society of London
Volume 141, Issue 4, pages 803–810, December 1963
How to Cite
FOX, H. (1963), THE HYOID OF NEOCERATODUS AND A CONSIDERATION OF ITS HOMOLOGY IN URODELE AMPHIBIA. Proceedings of the Zoological Society of London, 141: 803–810. doi: 10.1111/j.1469-7998.1963.tb01627.x
- Issue published online: 30 OCT 2009
- Article first published online: 20 AUG 2009
- Accepted 9th October, 1962
The early development of the hyoid of Neoceratodus is described, and its structure and topography are compared with relevant components in various urodele larvae. These include; Hynobius nebulosus, Hynobius (Salamandrella) keyserlingii, Hynobiua retardatua, Cryptobranchus japonicus, Cryptobranchus alleghaniensis, Salamandra maculosa, Ambystoma mexicanum. Necturus maculatus, Desmognathus fuscus fuscus, Desmognathus quadrimaculatus, and Plelhodon cinereua.
It is concluded that in Neoceratodus the stylohyale develops from the quadrate cartilage, and the otoquadrate cartilage derives from a pharyngohyale, which is recognized in urodeles as a post-palatine cartilage. The columella (and stilus) of the latter co-exists with a pharyngohyale, and thus may either derive from the hyoid blastema sui generic, or alternatively from an epihyale-laterohyale component of an ancestral stock common to Dipnoi and Urodela.