Category:Norian first appearances
Here is a list of articles in the category Norian first appearances of the Biology portal. This category includes biological taxa of rank more inclusive than genus that evolved during the Norian age of geologic time, between 228 and 208.5 million years ago, as well as genera and species that evolved during this time and persisted across multiple geological ages.
Pages in category "Norian first appearances"
The following 18 pages are in this category, out of 18 total.
- Drepanosaur (biology)
- Elasmosauridae (biology)
- Gonionautilidae (biology)
- Lessemsauridae (biology)
- Massospondylidae (biology)
- Sauropoda (biology)
- Trechnotheria (biology)
- Unaysauridae (biology)