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GeoRef Categories
Era and Period
Epoch and Age
Book Series
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Availability
Pelycosaurs
FIRST BASAL SYNAPSIDS (“PELYCOSAURS”) FROM THE UPPER PERMIAN-?LOWER TRIASSIC OF URUGUAY, SOUTH AMERICA Available to Purchase
Pennsylvanian pelycosaurs from Linton, Ohio and Nyrany, Czechoslovakia Free
Factor analysis of caseid pelycosaurs Free
A thermal model of the sailback pelycosaur Free
A primitive pelycosaur from the Pennsylvanian of Illinois Free
Comments on the pelycosaur Edaphosaurus and the validity of the species E. minuta Tasch Free
On a new pelycosaur from the lower Permian of Oklahoma, and on the origin of the family Caseidae Free
The skeleton of an immature pelycosaur, Dimetrodon cf. grandis, from the Permian of Texas Free
Figure 5. Midshaft cross-sections of the femur and tibia from “pelycosaurs... Available to Purchase
PREFACE The Pelyeosauria, or Theromorpha, of the late Paleozoic, reptiles particularly characteristic of the Permo-Carboniferous redbeds of the American Southwest, form a group of major importance in the history of land vertebrates. As first recognized by Cope, they represent an early stage in the beginning of mammal-like forms. They are also the dominant types in the oldest adequately known reptilian fauna and possess many archaic features which illustrate the structure of the primitive reptilian stock. Most of the earlier work on pelycosaurs was done by Cope. He realized the significance of the material, but his brief and often inadequate descriptions and meager illustrations failed to give the group the scientific prominence it deserved. A decade of work on the group by Case culminated in the publication in 1907 of his Revision of the Pelyeosauria of North America. Case figured most of the important material then known, straightened out many taxonomic snarls, and gave the first account of the general structure of a number of the more adequately represented types. Through the influence of this work, the pelycosaurs were at length generally accorded a place of importance among fossil vertebrates. This earlier period of the study of the pelycosaurs occupied essentially 3 decades. Since Case’s 1907 work increases in our knowledge have been slow. The paucity of material of even the most common types necessitated the leaving of lacunae in Case’s descriptions, few of which have since been filled. Many new data have been obtained, but little has . . .
FISHES AND TETRAPODS IN THE UPPER PENNSYLVANIAN (KASIMOVIAN) COHN COAL MEMBER OF THE MATTOON FORMATION OF ILLINOIS, UNITED STATES: SYSTEMATICS, PALEOECOLOGY, AND PALEOENVIRONMENTS Available to Purchase
New information on the pectoral girdle and vertebral column in Lupeosaurus (Reptilia, Pelycosauria) Free
Early Permian fossil vertebrate footprints and their stratigraphic setting in megacyclic sequence II red beds, Prim Point, Prince Edward Island Free
The many faces of synapsid cranial allometry Open Access
Table 2. Results of Spearman rank correlation tests for lower jaw measurem... Available to Purchase
UPPER PENNSYLVANIAN TETRAPODS FROM THE ADA FORMATION OF SEMINOLE COUNTY, OKLAHOMA Available to Purchase
No gap in the Middle Permian record of terrestrial vertebrates: COMMENT Open Access
Evolutionary trends and the origin of the mammalian lower jaw Available to Purchase
Outline of a Permian tetrapod footprint ichnostratigraphy Available to Purchase
Abstract: Tetrapod footprints are among the most common fossil remains in continental Permian strata and thus are of biostratigraphic interest. Based on the vertical distribution of the 13 best-known Permian tetrapod ichnotaxa, three footprint biochrons are suggested for the period: (1) Dromopus – latest Carboniferous (approximately Gzhelian) to late Early Permian (approximately Artinskian), representing ichnoassemblages dominated by tracks of temnospondyls, reptiliomorphs, pelycosaurs and early diapsids; (2) Erpetopus – late Early Permian (approximately Kungurian) to late Middle Permian (approximately Capitanian), representing ichnoassemblages dominated by tracks of non-diapsid eureptiles; and (3) Paradoxichnium – Late Permian (Wuchiapingian and Changhsingian), representing ichnoassemblages dominated by tracks of medium- and large-sized parareptiles, non-diapsid eureptiles and early saurians. This is the most conservative ichnostratigraphic concept, and it may be possible to refine it to almost stage-level resolution by future comprehensive analysis, especially of Permian captorhinomorph and therapsid footprints. Other major tasks to improve Permian tetrapod footprint ichnostratigraphy include enhanced knowledge of Middle Permian tetrapod footprints, and clarification of the palaeoenvironmental factors that may control the distribution of tetrapod footprints in space and time.