Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
권호 표지
DOI QR코드

DOI QR Code

Pleuronichthys sp. Fossils (Pleuronectidae) from the Duho Formation, Pohang Uhyeon-dong in Korea

포항시 우현동 두호층에서 산출된 Pleuronichthys sp. 화석

  • Received : 2016.03.28
  • Accepted : 2016.06.21
  • Published : 2016.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

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.

포항시 마이오세 두호층에서 2개의 신생대 어류 화석들이 발견되었다. 두호층에서 발견된 이 어류 화석들은 다음과 같은 근거로 도다리속으로 동정되었다. 첫째, 앞쪽 등지느러미가 두개부 위까지 연장되어 뻗어있다. 둘째, 두개골에서 안와는 모두 오른쪽에 몰려있는 비대칭성을 갖는다. 셋째, 낚시 바늘 모양의 미설골을 지닌다. 넷째, 미설골의 좌골부가 꺾여있다. 다섯째, 후의쇄골이 존재한다. 여섯째, 척추체의 개수가 27개를 넘는다. 일곱째, 첫 번째 뒷지느러미 담기골이 연장되어 있다. 여덟째, 미설골의 내연부가 'c'자 형태를 갖는다. 아홉째, 분문돌기가 작거나 거의 없다. 열째, 몸에 여러 반점들이 존재한다. 도다리속 어류 화석은 동아시아에서 최초로 보고되는 것이다. 두 표본은 두개골의 비대칭성과 납작한 정도에서 해부학적 차이가 존재한다. 이는 가자미과 어류의 독특한 개체발생 단계를 나타내는 데, 그들은 표영성 생활 양식에서 저서성 생활 양식으로 전환할 때 위와 같은 해부학적 차이를 수반하기 때문이다.

Keywords

References

  1. Amaoka, K., 1969, Studies on the sinistral flounders found in the waters around Japan. Taxonomy, anatomyand phylogeny. The Journal of the Shimonoseki University of Fisheries, 18, 65-340.
  2. Bak, Y.S., Lee, J.D., and Yun, H., 1997, Radiolarian faunas from the Hagjeon Formation (Middle Miocene) in the southern Pohang basin, Korea. Journal of the Paleontological Society of Korea, 13, 137-154.
  3. Chapleau, F., 1993, Pleuronectiform relationships: A cladistic reassessment. Bulletin of Marine Science, 52, 516-540.
  4. Chanet, B. and Schultz, O., 1994, Pleuronectiform fishes from the Upper Badenian (Middle Miocene) of St. Margarethen (Austria), Annalen des Naturhistorischen Museums In Wien. Serie A fur Mineralogie und Petrographie, Geologie und Palaontologie, Anthropologie und Prahistorie, 95-115.
  5. Chanet, B. and Armoon, A., 1999, Lower Miocene flatfish (Teleostei: Pleuronectiformes) from the Mishan Formation of Iran. Neues Jahrbuch fur Geologie und Palaontologie, 283-291.
  6. David, L.R., 1943, Miocene fishes of southern California. Geological Society of America Special Papers. No. 43, 13-14.
  7. Friedman, M., 2008, The evolutionary origin of flatfish asymmetry. Nature, 454 (7201), 209-212. https://doi.org/10.1038/nature07108
  8. Hensley, D.A. and Ahlstrom, E.H., 1984, Pleuronectiformes: Relationships, ontogeny and systematics of fishes. Vol. 1. American Society of Ichthyologists and Herpetologists Special Publication No. 1, 670-687.
  9. Kim, Y.U., 1972, Morphology of urohyal bones of Pleuronectidae fishes in Korean waters. Korean Journal of Fisheries and Aquaitc Sciences, 5(4), 121-127. (in Korean)
  10. Koh, Y.K., 1986, Silicoflagellates, ebridians and nannofossils from the Pohang (Neogene) and the Ulleung (Late Quaternary) basins, Korea. Unpublished Ph.D. dissertation, Seoul National University, Seoul, Korea, 210 p.
  11. Kim, K.H., Doh, S.J., Hwang, C.S., and Lim, D.S., 1993, Paleomagnetic study of the Yeonil Group in Pohang basin. Journal of Korean Society of Economic and Environmental Geology, 26, 507-518. (in Korean with English abstract)
  12. Kameda, Y. and Kato, M., 2011, Terrestrial invasion of pomatiopsid gastropods in the heavy-snow region of the Japanese Archipelago. BMC Evolutionary Biology, 11(118), 1-14. https://doi.org/10.1186/1471-2148-11-1
  13. Ko, J.Y., 2016, The description of the flat fish (Pleuronectiformes) Fossils from the Miocene Duho Formation, Pohang Yeonam-dong in Korea and its Implication. Journal of the Korean Earth Science Society, 37(1), 1-10. (in Korean) https://doi.org/10.5467/JKESS.2016.37.1.1
  14. Lee, Y.G., You, H.S., and Koh, Y.K., 1991, Biostratigraphy and paleoenvironments of Yeonil Group in Pohang area. Journal of Paleontological Society of Korea, 7, 32-62.
  15. Lee, T.H., Yi, K., Cheong, C.S., Jeong, Y.J., Kim, N., and Kim, M.J., 2014, SHRIMP U-Pb Zircon geochronology and geochemistry of drill cores from the Pohang basin. Journal of the Petrological Society of Korea, 23(3), 167-185. https://doi.org/10.7854/JPSK.2014.23.3.167
  16. Minami, T. and Tanaka, M., 1992, Life history cycles in flatfish from the northwestern Pacific, with particular reference to their early life histories. Netherlands Journal of Sea Research, 29(1), 35-48. https://doi.org/10.1016/0077-7579(92)90006-Z
  17. Norman, J.R., 1966, A systematic monograph of the flat fishes (Heterosomata). Johnson Reprint Corporation, NY, USA, 459 p.
  18. Nazarkin, M.V., 1997, A new Late Miocene flounder from Agnevo Svita, Sakhalin Island. Journal of Ichthyology, 37(8), 547-553.
  19. Nazarkin, M.V., 2002, Large flat fishes from the Miocene of the Agnev Formation of the Sakhalin Island. Journal of Ichthyology, 42, 7-18.
  20. Sakamoto, K., 1984, Interrelationships of the family Pleuronectidae (Pisces: Pleuronectiformers). Memoirs of the Faculty of Fisheries-Hokkaido University, Hokkaido, Japan, 215 p.
  21. Sakamoto, K. and Uyeno, T., 1989, A new Middle Miocene righteye flounder Hippoglossoides naritai from Tokoro, Hokkaido, Japan. Bulletin of the National Science Museum: Geology & Paleontology, 15(2), 71-79.
  22. Sakamoto, K. and Uyeno, T., 1991, Hippoglossoides kumaishi, a new Miocene righteye flounder from Oshima Peninsula, Hokkaido, Japan. Bulletin of National Science Museum, 17, 165-172.
  23. Sakamoto, K. and Uyeno, T., 1992, Saitamapsetta nomurai gen. et sp. nov., a righteye flounder from a Middle Bed in Saitama Prefecture, Japan. Bulletin of National Science Museum, 18, 101-112.
  24. Sakamoto, K. and Uyeno, T., 1993, A new Middle Miocene righteye flat fish, Microstomus tochigiensis, from Tochigi, Japan. Bulletin of National Science Museum, 19, 105-113.
  25. Sakamoto, K., Uyeno, T., and Otsu, T., 2001, Clidoderma yamagataensis, a new Middle Miocene righteye flatfish, from Yamagata Prefecture, Japan. Bulletin of National Science Museum, 27, 1-6.
  26. Suzuki, S., Kawashima, T., and Nakabo, T., 2009, Taxonomic review of East Asian Pleuronichthys (Pleuronectiform; Pleuronectidae), with description of a new species. Ichthyological Research, 56(3), 276-291. https://doi.org/10.1007/s10228-009-0100-7
  27. Tateiwa, I., 1924, Geological atlas of Chosen, no. 2, Ennichi, Kuruho and Choyo sheets. Geological Survey of Chosen, Seoul, Korea, 6 p.
  28. Um, S.H., Lee, D.W., and Bak, B.S., 1964, Explanatory text of the geological map of Pohang sheet. Geological Survey of Korea, Seoul, Korea, 17 p.
  29. Uyeno, T., Sakamoto, K., and Fujii, S., 1990, Three fish fossils from the Neogene strata at Himi City, Toyama Prefecture, Central Japan. Bulletin of National Science Museum, 18, 155-165.
  30. Yokogawa, K., Ogihara, G., and Watanabe, K.I., 2014, Identity of the lectotype of the East Asian flatfish Pleuronichthys cornutus (Temminck and Schlegel 1846) and reinstatement of Pleuronichthys lighti Wu 1929. Ichthyological Research, 61(4), 385-392. https://doi.org/10.1007/s10228-014-0405-z
  31. Yoon, S., 1986, Tectonic history of the Tertiary Pohang and Yangnam basins, Korea. In Nakagawa, H., Kotaka, T., and Takayanagi, Y. (eds.), Essays in Geology, Professor Nobu Kitamura Commemorative Volume. Professor Nobu Kitamura Taikan inenjigyo-Kai, Tohoku University, Sendai, 637-644.
  32. You, H.S., Koh, Y.K., and Kim, J.Y., 1986, A study on the nannoplankton from the Neogene formation, Pohang, Korea. Journal of Paleontological Society of Korea, 2, 137-154.
  33. Yun, H., 1986, Emended stratigraphy of the Miocene formation in the Pohang basin; part 1. Journal of Paleontological Society of Korea, 2, 54-69.

Cited by

  1. A review of vertebrate body fossils from the Korean Peninsula and perspectives vol.21, pp.6, 2017, https://doi.org/10.1007/s12303-017-0040-6