The Sebayashi Formation is a

Barremian The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 125.77 Ma (million years ago) and 121.4 ± 1.0 Ma (Historically, this stage was placed at 129.4 million to approximately 125 million years ago) It is a ...

Albian The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/s ...

geologic formation in

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

.Sebayashi Formation
at

Fossilworks Fossilworks was a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was cr ...

.org

Dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutio ...

remains are among the fossils that have been recovered from the formation, although only two species, ''

Fukuivenator ''Fukuivenator'' ("hunter of Fukui Prefecture") is an extinct genus of maniraptoran theropod dinosaur from the Early Cretaceous of Japan. Discovery and naming The type species ''Fukuivenator paradoxus'' was named and described in 2016 by Yoi ...

'' and ''

Siamosaurus ''Siamosaurus'' (meaning "Siam lizard") is a potentially nomen dubium, dubious genus of Spinosauridae, spinosaurid dinosaur that lived in what is now known as China and Thailand during the Early Cretaceous Period (geologic time), period (Barr ...

'', have been referred to a specific

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

.Weishampel et al., 2004, pp.517-607

Paleofauna

Bivalvia Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed b ...

indet. * Dinosauria indet. - "Footprints" *

Ornithopoda Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (). They represent one of the most successful groups of herbivorous dinosaurs during the Cretaceous. The most primitive members of the group were bipedal and relatively sm ...

indet. - "Footprints" * ''

''? - "Tooth (GMNH-PV-999)"Hasegawa et al., 2003 *

Spinosauridae Spinosauridae (or spinosaurids) is a clade or Family (taxonomy), family of tetanuran theropod dinosaurs comprising ten to seventeen known genera. Spinosaurid fossils have been recovered worldwide, including Africa, Europe, South America, and Asia. ...

indet. "Tooth (KDC-PV-0003)" * aff. '' Fukuiraptor kitadaniensis'' - "Tooth" *

Theropoda Theropoda (; from ancient Greek iktionary:θηρίον, , (''therion'') "wild beast"; wiktionary:πούς, , wiktionary:ποδός, (''pous, podos'') "foot" is one of the three major groups (Clade, clades) of Dinosaur, dinosaurs, alon ...

indet. - "Footprints"

References

Bibliography

* * {{citation , last1=Hasegawa , first1=Y , author2-link=Éric Buffetaut , last2=Buffetaut , first2=Éric , last3=Manabe , first3=M. , last4=Takakuwa , first4=Yuji , year=2003 , title=A possible spinosaurid tooth from the Sebayashi Formation (Lower Cretaceous), Gunma, Japan , url=https://www.researchgate.net/publication/313142817 , journal= Bulletin of the Gunma Museum of Natural History , volume=7 , pages=1–5 Geologic formations of Japan Lower Cretaceous Series of Asia Cretaceous Japan Albian Stage Aptian Stage Barremian Stage Sandstone formations Shale formations Conglomerate formations Deltaic deposits Ichnofossiliferous formations Paleontology in Japan

Paleofauna

See also

References

Bibliography