Annals of the South African Museum, Volume 64The Museum, 1974 - Natural history |
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Page 23
... show braincase and stapes . Natural size . ( Redrawn from Efremov 1940. ) specializations with seymouriamorph characters . The most important is Nyctiphruretus ( Fig . 5 ) from the Upper Permian of Russia ( Efremov 1940 ) which shows ...
... show braincase and stapes . Natural size . ( Redrawn from Efremov 1940. ) specializations with seymouriamorph characters . The most important is Nyctiphruretus ( Fig . 5 ) from the Upper Permian of Russia ( Efremov 1940 ) which shows ...
Page 126
... shows close resemblance to the Eodicynodon condition with the difference that , although the secondary palate is still short and the internal nares reach the level of the tusks , the anterior parts of the choanae are reduced to slits ...
... shows close resemblance to the Eodicynodon condition with the difference that , although the secondary palate is still short and the internal nares reach the level of the tusks , the anterior parts of the choanae are reduced to slits ...
Page 236
... shows that our information on the development of this group , especially in the first half of its evolution , is extremely scanty . The oldest Kimmeridgian multituberculates ( Hahn 1969 , 1971 ) already show all the essential features ...
... shows that our information on the development of this group , especially in the first half of its evolution , is extremely scanty . The oldest Kimmeridgian multituberculates ( Hahn 1969 , 1971 ) already show all the essential features ...
Contents
Scientific papers of L D Boonstra | 3 |
The braincase and associated structures of the cotylosaur reptile Procolophon triconiceps | 11 |
On the source of therapsids by E C OLSON | 47 |
Copyright | |
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Africa antérieure anteriorly astragalus basioccipital basisphenoid bone Boonstra bord braincase Broom calcaneum canal canine caniniform Chronofauna Cistecephaloides Cistecephalus complexe para-basisphénoïde condyle cranial crête cynodonts dentary dicynodonts Dimetrodon distal dorsal process edge Eodicynodon être exoccipital fauna fenestra ovalis fenêtre foramen Formation forms fossa fossil frontal genera genus Gondwana Gorgonops gorgonopsians H:B index Haughton Heterodontosaurus holotype Karroo Kawingasaurus kitchingi Kombuisia l'opisthotique late Cretaceous lateral lower jaw Lycorhinus Lycorhinus angustidens Lystrosaurus maxilla maxillaire medial Moschorhinidae moyennement multituberculate museau occipital Olson opisthotic ornithischian palate parietal paroccipital pelycosaurs Permian Permien supérieur Pisanosaurus postcanine postérieure posterior posteriorly postorbital pr.q.Pt premaxilla prémaxillaire premaxillary preparietal primitive processus carré Procolophon prootic prootique pterygoid ptérygoïde quadrate région reptiles Reptilia ridge Romer SAN DIEGO Sigogneau skull roof sousorbitaire specimen squamosal stapes supraoccipital surface suture tarsus teeth terrestrial therapsids Thulborn tibia Triassic upper horizontal groove ventral vertebrates vomer Watongia Whaitsiidae zone à Cistecephalus