The Jobu Formation is a

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

geologic formation of Late

Cenomanian The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age (geology), age of the Late Cretaceous epoch (geology), Epoch or the lowest stage (stratigraphy), stage of the Upper Cretace ...

age.

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 none have yet 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 ...

. The oldest confirmed tyrannosaurid

premaxillary The premaxilla (or praemaxilla) is one of a pair of small cranial bones at the very tip of the upper jaw of many animals, usually, but not always, bearing teeth. In humans, they are fused with the maxilla. The "premaxilla" of therian mammals has ...

tooth was recovered from the Jobu Formation.Holtz, 2001 The mammal '' Sorlestes'' is also known from the formation.

Fossil content

The following fossils were reported from the formation:Jobu Formation
in the

Paleobiology Database The Paleobiology Database (PBDB) is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database originated in the NCEAS-funded Phanerozoic Marine Pale ...

Mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...

s ** '' Sorlestes mifunensis''Setoguchi et al., 1999 *

s ** Carnosauria indet. (='' Allosaurus sp.''?)Tamura et al., 1991 ** Ceratopsia indet. ** Tetanurae indet.Carrano et al., 2012 ** Theropoda indet.Chure et al., 2011 ** Tyrannosauridae indet.Manabe, 1999 *

Pterosaur Pterosaurs are an extinct clade of flying reptiles in the order Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 million to 66 million years ago). Pterosaurs are the earli ...

s ** Azhdarchidae indet.Ikegami et al., 2000 *

Turtle Turtles are reptiles of the order (biology), order Testudines, characterized by a special turtle shell, shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Crypt ...

s ** '' Adocus sp.''Danilov et al., 2011 ** '' Shachemys sp.'' ** Nanhsiungchelyidae indet.Danilov & Syromyatnikova, 2008

References

{{Reflist, 3

Bibliography

* M. T. Carrano, R. B. J. Benson, and S. D. Sampson. 2012. The phylogeny of Tetanurae (Dinosauria: Theropoda). Journal of Systematic Palaeontology 10(2):211-300 * I. G. Danilov, V. B. Sukhanov, and E. V. Syromyatnikova. 2011. New Asiatic materials on turtles of the family Adocidae with a review of the adocid record in Asia. Proceedings of the Zoological Institute, Russian Academy of Sciences 315(2):101-132 * I. G. Danilov and E. V. Syromyatnikova. 2008. New materials on turtles of the family Nanhsiungchelyidae from the Cretaceous of Uzbekistan and Mongolia, with a review of the Nanhsiungchelyid record in Asia. Proceedings of the Zoological Institute RAS 312(1/2):3-25 * Holtz, T.R., Jr. 2001. The phylogeny and taxonomy of the Tyrannosauridae. pp. 64–83, in D.H. Tanke and K. Carpenter (eds.), Mesozoic Vertebrate Life: New Research Inspired by the Paleontology of Philip J. Currie. Indiana Univ. Press * N. Ikegami, A. W. A. Kellner, and Y. Tomida. 2000. The presence of an azhdarchid pterosaur in the Cretaceous of Japan. Paleontological Research 3(4):165-170 * D. J. Chure, M. Manabe, M. Tanimoto and Y. Tomida. 1999. An unusual theropod tooth from the Mifune Group (Late Cenomanian to Early Turonian), Kumamoto, Japan. In Y. Tomida, T. H. Rich, and P. Vickers-Rich (eds.), Proceedings of the Second Gondwanan Dinosaur Symposium, National Science Museum Monographs 15:291-296 * M. Manabe. 1999. The early evolution of the Tyrannosauridae in Asia. Journal of Paleontology 73(6):1176-1178 * T. Setoguchi, T. Tsubamoto, H. Hanamura and K. Hachiya. 1999. An early Late Cretaceous mammal from Japan, with reconsideration of the evolution of tribosphenic molars. Paleontological Research 3(1):18-28 * M. Tamura, Y. Okazaki, and N. Ikegami. 1991. ccurrence of carnosaurian and herbivorous dinosaurs from upper formation of Mifune Group, Japan Kumamoto Daigaku Kyōiku Gakubu kiyō. Shizen kagaku 40:31-45 Geologic formations of Japan Upper Cretaceous Series of Asia Cenomanian Stage Mudstone formations Paleontology in Japan

Fossil content

See also

References

Bibliography