| 词条 | Protostega |
| 释义 |
| fossil_range = Late Cretaceous, {{fossilrange|83.5}} | image = Protostega Gigas.jpg | image_caption = Mounted skeleton | taxon = Protostega | authority = Cope, 1872 | type_species = {{extinct}}Protostega gigas | type_species_authority = Cope, 1872 }}Protostega ('first roof') is an extinct genus of marine turtle containing a single species, Protostega gigas. Its fossil remains have been found in the Smoky Hill Chalk formation of western Kansas (Hesperornis zone, dated to 83.5 million years ago[1]) and time-equivalent beds of the Mooreville Chalk Formation of Alabama.[2] Fossil specimens of this species were first collected in 1871, and named by Edward Drinker Cope in 1872.[3] With a length of {{convert|3|m|ft}}, it is the second-largest sea turtle that ever lived, second only to the giant Archelon,[4] and the third-largest turtle of all time behind Archelon and Stupendemys.[5] References1. ^Carpenter, K. (2003). "Vertebrate Biostratigraphy of the Smoky Hill Chalk (Niobrara Formation) and the Sharon Springs Member (Pierre Shale)." High-Resolution Approaches in Stratigraphic Paleontology, 21: 421-437. {{doi|10.1007/978-1-4020-9053-0}} 2. ^{{cite journal |last=Kiernan |first=Caitlin R. |year=2002 |title=Stratigraphic distribution and habitat segregation of mosasaurs in the Upper Cretaceous of western and central Alabama, with an historical review of Alabama mosasaur discoveries |journal=Journal of Vertebrate Paleontology |volume=22 |issue=1 |pages=91–103 |url=http://www.bioone.org/doi/full/10.1671/0272-4634(2002)022%5B0091%3ASDAHSO%5D2.0.CO%3B2 |accessdate=2009-02-02 |doi=10.1671/0272-4634(2002)022[0091:SDAHSO]2.0.CO;2 }} 3. ^{{cite journal | last =Cope| first =Edward Drinker| authorlink =Edward Drinker Cope| title =A description of the genus Protostega| journal =Proceedings of the Academy of Natural Sciences of Philadelphia| volume =| issue =| pages = 422–433| year =1872 | url = | doi = | id = | accessdate = }} 4. ^{{cite book | last =Lutz | first =Peter L. | authorlink =Peter Lutz |author2=John A. Musick | title =The Biology of Sea Turtles | publisher =CRC PRess | year =1996 | location = | url =https://books.google.com/books?id=fhm2yGTBiN8C&dq=protostegidae | doi = | id = | isbn =0-8493-8422-2| page =432pp.}} 5. ^Wood, R.C. (1976). "Stupendemys geographicus, the world's largest turtle." Breviora, 436: 1-31. {{Portal|Paleontology|Turtles}}{{Extinct turtles}}{{Taxonbar|from=Q1051251}}{{paleo-turtle-stub}} 5 : Protostegidae|Late Cretaceous turtles of North America|Prehistoric turtle genera|Taxa named by Edward Drinker Cope|Mooreville Chalk |
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