Journal article
Cenomanian micromorphic ammonites from the Western Interior of the USA
- Abstract:
-
Calcareous concretions from middle and upper Cenomanian (Cretaceous) shale sequences in Montana and Wyoming yield, on rare occasions, abundant minute ammonites. Some are juveniles of large species, and give valuable evidence on early ontogeny and evolutionary affinities of these taxa. They provide evidence for the probable evolutionary origins of a series of hitherto undescribed progenic dwarf genera, adult at 4.5-16.5 mm diameter that are a remarkable feature of these assemblages. Five new g...
Expand abstract
Actions
Authors
Bibliographic Details
- Journal:
- Palaeontology
- Volume:
- 33
- Issue:
- 2
- Pages:
- 379-422
- Publication date:
- 1990-01-01
- ISSN:
-
0031-0239
- Source identifiers:
-
81916
Item Description
- Language:
- English
- Pubs id:
-
pubs:81916
- UUID:
-
uuid:68112446-53fa-4187-bcf1-e88aa547c38f
- Local pid:
- pubs:81916
- Deposit date:
- 2013-02-20
Terms of use
- Copyright date:
- 1990
If you are the owner of this record, you can report an update to it here: Report update to this record