Topic
Cteniogenys
About: Cteniogenys is a research topic. Over the lifetime, 10 publications have been published within this topic receiving 338 citations.
Papers
TL;DR: Comparison with known choristoderes, based on an analysis of 53 derived character states, suggests that Ctemogenys is the most primitive of known genera, which supports recent analyses which conclude that Champsosaurus and Simoedosaurus are derived from archosauromorph diapsids, not lepidosauromorphics as once thought.
65 citations
TL;DR: Well-preserved skulls and mandibles from the Oldman and Horseshoe Canyon formations, Alberta, document a new species of Champsosaurus and clarify the status of previously known species of the genus.
63 citations
TL;DR: Fossils from the late Jurassic Morrison Formation, Como Bluff, Wyoming (Tithonian, ∼140 Myr ago) show that three genera of European lizards from the later Jurassic of England and Portugal (Cteniogenys, Paramacellodus Dorsetisaurus) also inhabited North America.
Abstract: Fossils from the late Jurassic Morrison Formation, Como Bluff, Wyoming (Tithonian, ∼140 Myr ago) show that three genera of European lizards from the later Jurassic of England and Portugal (Cteniogenys, Paramacellodus Dorsetisaurus) also inhabited North America. These specimens corroborate evidence from mammal and other terrestrial vertebrate faunal similarities that western Europe and western North America had a continuous land connection in the late Jurassic. Some of this similarity, however, is pre-Tithonian, indicating that widespread mid-Jurassic transgressive seas in Europe were no barrier to vertebrate dispersal.
48 citations
TL;DR: Lazarussuchus inexpectatus, from the Oligocene, is a new form of Choristodera which extends the longevity of this clade into the Middle Tertiary and bears a remarkable assemblage of primitive characters.
41 citations
Journal Article•
TL;DR: Phylogenetic analysis places the new Japanese form in a small clade with Cteniogenys and the Triassic Pachystropheus, which is the sister taxon of crown-group Neochoristodera.
Abstract: A new, small (c. 250 mm snout-vent length) choristoderan reptile, Shokawa ikoi gen. et sp. nov., is described from the early Cretaceous Okurodani Formation, Tetori Group, of Japan. It is distinguished from other known choristoderans in having a long neck with at least 16 cervical vertebrae. The skeleton is pachyostotic and the caudal neural spines are much taller than those of the Jurassic Cteniogenys, both features suggesting a more aquatic lifestyle. Phylogenetic analysis places the new Japanese form in a small clade with Cteniogenys and the Triassic Pachystropheus. This clade is the sister taxon of crown-group Neochoristodera.
41 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2011 | 1 |
| 2007 | 1 |
| 2006 | 1 |
| 1999 | 1 |
| 1998 | 1 |
| 1992 | 1 |