• Title/Summary/Keyword: neurocranium

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Pleuronichthys sp. Fossils (Pleuronectidae) from the Duho Formation, Pohang Uhyeon-dong in Korea (포항시 우현동 두호층에서 산출된 Pleuronichthys sp. 화석)

  • Ko, Ju-Yeong;Nam, Kye-Soo
    • Journal of the Korean earth science society
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    • v.37 no.3
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    • pp.133-142
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    • 2016
  • Two specimens of the Cenozoic fish fossils were discovered from the Miocene Duho Formation of Uhyeon-dong, Pohang, Korea. These fossils are identified as Pleuronichthys sp. based on the following- firstly, front dorsal fin rays elongated to the upper part of neurocranium, Secondly, right sided orbit of neurocranium, Thirdly, presence of urohyal like fish-hook, Fourthly, curved sciatic part of the urohyal, Fifthly, presence of postcleithrum, Sixthly, over 27 centrum, Seventhly, elongated first pterygiophore of the anal fin rays, Eightly, c-shaped inner side of urohyal, Ninthly, small or few cardiac apophysis, and Tenthly, presence of many spots on body. These fossils of Pleuronichthys represent the first record in East-Asia. Two specimens are anatomically different in the extent of the asymmetry and the flatness of skull. This represents the unique ontogeny stage of the Pleuronectidae, because they accompany the above anatomical difference when they transform from pelagic lifestyle to benthic lifestyle.

Anatomical study on the individual bones of the cranium of Korean native goat (한국재래산양 뇌두개의 분리골에 대한 해부학적 연구)

  • Yi, Seong-joon;Lee, Heungshik S
    • Korean Journal of Veterinary Research
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    • v.34 no.3
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    • pp.421-433
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    • 1994
  • This study was carried out to identify anatomical characteristics of the individual bones of the cranium of the Korean native goat. The pars lateralis and pans basilaris of the os occipitale were fused each other, whereas the squama occipitalis articulated with the pars lateralis, forming the sutrue. The sinus sphenoidale was formed in the corpus ossis presphenoidalis. The os prietale was observed as a single bone. In the os frontale, an fossa innominatum was found ventrolateral to the root of processus cornualis, and the orificium orbitale canalis supraorbitalis was also formed on the pars orbitalis. The meatus temporalis was formed in the medial side of the pars squama of the os temporalis. The lamina cribrosa of the os ethmoidale was membrane-like structure with many foramina. The labyrinth ethmoidalis was composed of four endoturbinalia and ten to twelve ectoturbinalia.

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Osteological Study of the Mudhopper, Periopthalmus cantonensis (Perciformes, Gobiidae) from Korea (한국산 말뚝망둥어 Periopthalmus cantonensis(농어목:망둑어과)의 골학적 연구)

  • 이충렬
    • The Korean Journal of Zoology
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    • v.33 no.4
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    • pp.402-410
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    • 1990
  • The osteological characteristics of Mudhopper, P. cantonensis, was described and compared with its related species, Tridentiger obscurus, Synechogobius hasta and Odontogobius platycephala The skeletal structures of P. canionensis were distinctly different from those of other species in many respects: the form of the neurocranium, the pterygoid, the radial and the parhypural, the fused state between ribs and hypomerals. However, in respect of having five branchiostegals, two epurals and hypomerals, P. cantonensis were in common with T obscurus, S. hasia and O. platycephala.

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Development and Growth of the Normal Cranial Vault : An Embryologic Review

  • Jin, Sung-Won;Sim, Ki-Bum;Kim, Sang-Dae
    • Journal of Korean Neurosurgical Society
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    • v.59 no.3
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    • pp.192-196
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    • 2016
  • Understanding the development of a skull deformity requires an understanding of the normal morphogenesis of the cranium. Craniosynostosis is the premature, pathologic ossification of one or more cranial sutures leading to skull deformities. A review of the English medical literature using textbooks and standard search engines was performed to gather information about the prenatal development and growth of the cranial vault of the neurocranium. A process of morphogenic sequencing begins during prenatal development and growth, continues postnatally, and contributes to the basis for the differential manner of growth of cranial vault bones. This improved knowledge might facilitate comprehension of the pathophysiology of craniosynostosis.

Osteological development of wild-captured larvae and a juvenile Sebastes koreanus (Pisces, Scorpaenoidei) from the Yellow Sea

  • Yu, Hyo Jae;Kim, Jin-Koo
    • Fisheries and Aquatic Sciences
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    • v.19 no.4
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    • pp.20.1-20.12
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    • 2016
  • The osteological development in Sebastes koreanus is described and illustrated on the basis of 32 larvae [6.11-11.10 mm body length (BL)] and a single juvenile (18.60 mm BL) collected from the Yellow Sea. The first-ossified skeletal elements, which are related to feeding, swimming, and respiration, appear in larvae of 6.27 mm BL; these include the jaw bones, palatine, opercular, hyoid arch, and pectoral girdle. All skeletal elements are fully ossified in the juvenile observed in the study. Ossification of the neurocranium started in the frontal, pterotic, and parietal regions at 6.27 mm BL, and then in the parasphenoid and basioccipital regions at 8.17 mm BL. The vertebrae had started to ossify at ~7.17 mm BL, and their ossification was nearly complete at 11.10 mm BL. In the juvenile, although ossification of the pectoral girdle was fully complete, the fusion of the scapula and uppermost radial had not yet occurred. Thus, the scapula and uppermost radial fuse during or after the juvenile stage. The five hypurals in the caudal skeleton were also fused to form three hypural elements. The osteological results are discussed from a functional viewpoint and in terms of the comparative osteological development in related species.