• Corpus ID: 40883868

Morphology and systematics of the northern Dvina Cynodonts lReptiliac Therapsidas upper Permianr

@inproceedings{Tatarinov1968MorphologyAS,
  title={Morphology and systematics of the northern Dvina Cynodonts lReptiliac Therapsidas upper Permianr},
  author={Lp. Tatarinov},
  year={1968}
}
The materials on the North Dvina cynodonts, Dvinia prima and "Permocynodon sushkini", are redescribed. These cynodonts have a complete secondary palate, an interpterygoid vacuity of the therocephalian type, a medioventral contact between the basipterygoid processes, and an additional mandibular articulation between the surangular and quadratojugal. In addition, I have found an impression of the external auditory meatus, which has a structure of the tritylodont type but runs to the region of the… 

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References

SHOWING 1-10 OF 35 REFERENCES
On the Tooth-Replacement in Theriodont Reptiles
TLDR
In describing the very mammal-like dentitions of some of the advanced Theriodont reptiles various authors have identified premolars and molars, but there is no satisfactory evidence that only two dentitions were present or that the replacement was of a mammalian type.
New Light on the Mammalian Ear Ossicles
TLDR
The structure of the middle ear region of several therapsids is greatly illuminated by this work; but some of his conclusions seem to be open to question, while others can be further supported.
THE EVOLUTION OF THE MAMMALIAN EAR
TLDR
It is evident that the authors shall never know the steps which led up to the craniate eye, but they can expect to see and to understand much of the evolutionary history of the sound transmitting mechanism of the mammalian middle ear, one of the great steps for which an independent macroevolution is invoked.
The morphology of the skull of a young Galesaurus planiceps and related forms
TLDR
Dental succession of postcanines, distichical replacement of post canines, long prevomer, short parasphenoid, incomplete osseous incasement of semicircular canals, and other characteristics label Galesaurus as primitive cynodont.
Note sur une nouvelle espece de Scaloposauridae
Tooth replacement phenomena in the lower vertebrates
Zittel's Text-Book of Palæontology
  • History
  • 1903
NEARLY three years have elapsed since we received the first volume of the English edition of Prof. Karl A. von Zittel's well-known “Grundzüge der Palæontologie.” We therefore open the newly published
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