Wakinosaurus
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Wakinosaurus (meaning "Wakino lizard") is a genus of theropod dinosaur from the Early Cretaceous (Valanginian-Barremian) Sengoku Formation of Kyushu, Japan. The genus is a tooth taxon, based solely on the middle section of a single tooth.[1]
Discovery and naming
In 1990 the ice hockey player Masahiro Sato in Fukuoka found the tooth of a theropod. The same year Yoshihiko Okazaki first reported on the find.[1] In 1992 Okazaki named the type species, Wakinosaurus satoi. The generic name refers to the Wakino Subgroup of the Kwanmon Group, of which the Sengoku Formation is a member. The specific name honours Sato.[2]
Description
The holotype is KMNH VP 000,016, a single damaged tooth, the crown of which must have been about seven centimetres long. Its base length is Script error: No such module "convert"., its base width Script error: No such module "convert".. It has about thirty serrations per five millimetres.[3]
Wakinosaurus was initially described as a megalosaurid but is today considered a nomen dubium and an indeterminate neotheropod. The holotype tooth is similar to a leaf with fine cutting serrations on both edges and according to Okazaki, it is similar to those of "Prodeinodon" kwangshiensis, which is also a dubious tooth taxon. In 2020, it was suggested that Wakinosaurus may represent a basal carcharodontosaurid theropod similar to Acrocanthosaurus.[4]
References
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- ↑ a b Okazaki, Y., (1990), "Discovery of dinosaur remain from the Kwanmon Group", Abstract of the Annual Meeting of the Paleontological Society of Japan, 37
- ↑ Okazaki, Y. (1992). A new genus and species of carnivorous dinosaur from the Lower Cretaceous Kwanmon Group, northern Kyushu. Bulletin of the Kitakyushu Museum of Natural History 11:87-90
- ↑ *Hasegawa, Y., Murata, M., Wasada, K. & Manabe M., 1992, "The First Carnosaur (Saurischia; Theropoda) from Japan: a Tooth from the Cenomanian Mifune Group of Kyushu", Science Reports of the Yokohama National University, 2(39): 41-49
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