著者

須田 有輔

出版者

北九州市立自然史・歴史博物館

雑誌

北九州市立自然史博物館研究報告 (ISSN:0387964X)

巻号頁・発行日

vol.10, pp.53-89, 1991-03-31 (Released:2023-12-28)

著者

Yoshihiko Okazaki

出版者

Kitakyushu Museum of Natural History and Human History

雑誌

北九州市立自然史博物館研究報告 (ISSN:0387964X)

巻号頁・発行日

vol.11, pp.87-90, 1992-03-30 (Released:2023-12-20)

参考文献数

6

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A large tooth of a carnivorous dinosaur is reported as the first record from the Lower Cretaceous Kwanmon Group, northern Kyushu, Japan. The characters of the tooth, such as fine serration, rugose longitudinal surface ornamentation and compressed shape, are significant, and a new genus and species, Wakinosaurus satoi is proposed. The genus is allocated to the Family Megalosauridae tentatively.

著者

籔本 美孝 上野 輝彌

出版者

北九州市立自然史・歴史博物館

雑誌

北九州市立自然史博物館研究報告 (ISSN:0387964X)

巻号頁・発行日

vol.5, pp.143-161, 1984-09-20 (Released:2023-11-24)

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Recent studies which drastically changed the systematic position of Oryzias latipes stimulated us to investigate and provide complete osteological illustrations and description of the rice fish which has been one of the most popular fishes in Japan.The important osteological features of Oryzias latipes Temminck et Schlegel include loss of some elements, and specialization in structures related to feeding and sexual dimorphism. Bony elements lost in Oryzias latipes are parietals, prevomer, infraorbital bones, supraorbitals, intercalars, orbitosphenoid, basisphenoid, 1st and 2nd pleural ribs, ectopterygoids, metapterygoids, 1st pharyngobranchials, upper hypohyals, interhyals, supracleithra, mesocoracoids. Morphological specializations include sexual dimorphism in tooth forms: teeth are larger and fewer in male with robust teeth at the posterior end of the premaxillary. Branchial skeletons have special enlargement of 3rd pharyngobranchials and pharyngeal bones. Number of vertebrae is 27–30 with 11–12 abdominal and 16–18 caudal vertebrae.