A Skeletal Model of the Primitive Reptile Seymouria, and the Phylogenetic Position of That type

@article{RomerASM,
  title={A Skeletal Model of the Primitive Reptile Seymouria, and the Phylogenetic Position of That type},
  author={Alfred Sherwood Romer},
  journal={The Journal of Geology},
  volume={36},
  pages={248 - 260}
}
  • A. Romer
  • Published 1 April 1928
  • Biology
  • The Journal of Geology
A skeletal model of Seymouria, a primitive tetrapod, is described and figured, together with a life-restoration. Seymouria is to be considered a reptile rather than an amphibian, for it possesses many positive reptilian characters, while the amphibian structure of its otic region is that to be expected in the ancestry of the reptiles. 
Gnathostome vertebrae and the classification of the Amphibia
Four pairs of arcualia were primitively present in each segment of gnathostomes. The individual vertebral ossifications of early temnospondyls are most economically interpreted as the endochondral
The dorsal axial musculature of certain primitive permian tetrapods
The development of the dorsal axial musculature is traced from Eryops, through Diadectes, to Dimetrodon. lguana, a modern form, is used for comparison. The axial muscles of a primitive form, such as
REDESCRIPTION OF SEYMOURIA SANJUANENSIS (SEYMOURIAMORPHA) FROM THE LOWER PERMIAN OF GERMANY BASED ON COMPLETE, MATURE SPECIMENS WITH A DISCUSSION OF PALEOECOLOGY OF THE BROMACKER LOCALITY ASSEMBLAGE
Abstract Two nearly complete, articulated, mature specimens of the amphibian Seymouria are described from the Lower Permian Tambach Formation, lowermost unit of the Upper Rotliegend, of the Bromacker
FIRST DESCRIPTION OF SKULL OF LOWER PERMIAN SEYMOURIA SANJUANENSIS (SEYMOURIAMORPHA: SEYMOURIIDAE) AT AN EARLY JUVENILE GROWTH STAGE
TLDR
This partial but widely spaced ontogenetic series of the skull of S. sanjuanensis is the first to be documented for any Seymouriamorpha and indicates that Seymouria underwent metamorphosis at much earlier stage than Discosauriscus.
The Evolution of the Spiracular Region From Jawless Fishes to Tetrapods
TLDR
The first confirmed example of a complete spiracular gill in any vertebrate is presented, in the galeaspid (jawless stem gnathostome) Shuyu, and comparisons with two other groups of jawless stem Gnathostomes indicate that they also probably possessed full-sized Spiracular gills and that this condition may thus be primitive for the gnathOSTome stem group.
Limb-Bone Development of Seymouriamorphs: Implications for the Evolution of Growth Strategy in Stem Amniotes
Tetrapod life on land was the result of a lengthy process, the final steps of which resulted in full independence of amniotic tetrapods from the aquatic environment. Developmental strategies,
Lower Permian Terrestrial Paleoenvironments and Vertebrate Paleoecology of the Tambach Basin (Thuringia, Central Germany): The Upland Holy Grail
Abstract The Bromacker section of the Lower Permian, Tambach Formation, in central Germany, yields an important fossil-vertebrate assemblage that was deposited in an upland setting near the center of
Early Mesozoic deformations of the eastern Yanshan thrust belt, northern China
The Yanshan thrust belt (YTB) is located at the northern edge of the North China plate. Because of the intense thicking and subsequent delamination of the lithosphere in north China, geologists have
Die jüngere Stammesgeschichte des Menschen
Die Geschichte des Menschen ist so alt wie die Geschichte des Lebens selbst. Eine eigene Geschichte des Menschen beginnt erst wahrend der Endphasen des Tertiars. Vor dieser uns geologisch
...
...