Joseph T. Gregory
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View article: Changing Concepts of the Nature and Significance of Fossils
Changing Concepts of the Nature and Significance of Fossils Open
Plant and animal fossils have been observed and collected since prehistoric times. Greek and Chinese writers 2000 years ago interpreted marine shells in mountains far from the sea as evidence of former extension of the sea over land. The s…
View article: MICROSAURS AND THE ORIGIN OF CAPTORHINOMORPH REPTILES
MICROSAURS AND THE ORIGIN OF CAPTORHINOMORPH REPTILES Open
Microsaurs are Paleozoic lepospondylous Amphibia with slender bodies and weak limbs. Their solidly roofed skulls lack otic notches, have large supratemporals widely separating the squamosal from parietal, and double occipital condyles. The…
View article: The genera of phytosaurs
The genera of phytosaurs Open
The long-snouted, crocodile-like, amphibious reptiles of the Late Triassic known as phytosaurs are assigned to 5 genera on the basis of cranial characters. The most primitive genus, Paleorhinus, has external nares well forward of the antor…
View article: Bassariscus in Miocene faunas and "Potamotherium lycopotamicum Cope."
Bassariscus in Miocene faunas and "Potamotherium lycopotamicum Cope." Open
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
View article: A large Pycnodont from the Niobrara Chalk
A large Pycnodont from the Niobrara Chalk Open
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.