| 词条 | Durotrigensia |
| 释义 |
|fossil_range = {{fossil range|Bajocian|ref=[1]}} | image = Parkinsoiniidae - Durotrigensia species.JPG |image_caption = Fossil of Durotrigensia species from France, on display at Galerie de paléontologie et d'anatomie comparée in Paris | taxon = Durotrigensia | authority = Buckman, 1928 | subdivision_ranks = Species | subdivision = see text }} Durotrigensia is a genus of ammonites (Ammonitida) in the perisphinctoid family Parkinsoniidae. Durotrigensia is sometimes considered a subgenus of Parkinsonia and is related also to Oraniceras and Okribites. These cephalopods lived during the Bajocian stage of the Middle Jurassic some 170 to 164 million years ago.[1] DescriptionThese large to giant ammonites have sharp and finely ribbed inner whorls and smooth outer whorls, without tubercles or lappets. References1. ^1 {{cite journal | last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database|authorlink =| coauthors =| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| doi =| id =| accessdate = 2014-05-28 }}
2 : Jurassic ammonites|Bajocian life |
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