Browse > Article

Cenozoic Brittle Stars (Ophiuroidea) from the Hagjeon Formation and the Duho Formation, Pohang Basin, Korea  

Seong, Mi-Na (Department of Geology, Kyungpook National University)
Kong, Dal-Yong (National Research Institute of Cultural Heritage, Cultural Heritage Administration)
Lee, Bong-Jin (Department of Geology, Kyungpook National University)
Lee, Seong-Joo (Department of Geology, Kyungpook National University)
Publication Information
Economic and Environmental Geology / v.42, no.4, 2009 , pp. 367-376 More about this Journal
Abstract
Forty specimens of fossil ophiuroids were collected from two formations of the Cenozoic marine deposits, Duho Formation and Hagjeon Formation, Pohang Basin, Korea. A few specimens were three-dimensionally preserved: most of them were remained flattened and articulated. Although a gross morphology is well preserved in some specimens, the details such as disk shape and plates which is the most important diagnostic features were not observed. Most of the arms are disarticulated, and thus arm vertebra, arm spines and/or arm plates are separately preserved. Only an oral side is recognized in an attached specimens because crossing arms into disk are clearly visible. It is, thus almost impossible to identify Korean ophiuroid fossils as a species level or even a genus level. The fossils were classified into 3 groups by gross morphology of disk and arm, and architecture of vertebra. The most abundant fossils (32 specimens), were found only in the Hagjeon Formation. The majority of specimens are partially disarticulated, having only proximal and median portions of their arms preserved. Arm plates are disarticulated from arm vertebra: most of them show structure of arm vertebra. It has long and well-preserved arm spines, and large tentacle pore. Some specimens (4 specimens) from the Duho Formation is characterized by short and conical arm spines, and well-developed arm plates. Lateral arm plates are small in compared to dorsal and ventral arm plates. The others (4 specimens) is poor in preservation state showing circular oral disk and relatively short sinuous arms. No arm plates are either identified.
Keywords
Duho Formation; Hagjeon Formation; Ophiuroidea; Pohang Basin; Tertiary;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kim, B.K., Cheong, C.H., Koh, I.S., Paik, K.H. and Koh, Y.K. (1982) Micropaleontological and sedimentological studies of the Neogene Tertiary in Korea. Journal of the Geological Society of Korea, v. 18, p. 19-36
2 Kim, K.H., Doh, S.J., Hwang, C.S. and Lim, D.S. (1993) Paleomagnetic study of the Yeonil Group in Pohang basin. The Journal of the Korean Institute of Mining Geology, v. 26, p. 507-518
3 Lee, Y.G. and Yoon. S. (2004) The paleontological society of korea special, Special Publication. No. 7, p. 217-224
4 Linne, C. (1758) Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, Cum Characteribus, Differentiis, Synonymis, Locis Tomus I. Editio decima, reformata, 827p
5 Um, S. H., Lee, D. W., and Bak, B. S. (1964) Explanatory text of the geological map of Pohang sheet (scale. 1:50000): Seoul, South Korea, Geological Survey of. Korea, 38p
6 Yun, H.S. (1986) Emended stratigraphy of the Miocene formations in the Pohang Basin, part I. Journal of the Paleontological Society of Korea, v. 2, p. 54-69
7 Koh, Y.K. (1986) Silicoflagellates, Ebridians and Nannofossils from the Pohang (Neogene) and the Ulleung (late Quarternary) Basin, Korea. Ph. D. thesis, Seoul National University, 220p
8 Spencer, W.K. and Wright, C. W. (1956) Asterozoans, Treatise on Invertebrate Paleontology: Part U Echinodermata 3, 695p
9 Chung, C.H. and Koh, Y.K. (2005) Palynostratigraphic and palaeoclimatic investigations on the Miocene deposits in Pohang area, South Korea. Review of Palaeobotany and Palynology, v. 135, p. 1-11   DOI   ScienceOn
10 Chun, H.Y. (1982) Plant fossils from the Tertiary Pohang sedimentary basin, Korea. KIGAM Report on geoscience and Mineral Resource, v. 14, p. 7-24
11 Matsumoto, H. (1915) A new classification of the Ophiuroidea. With description of new genura and species. Proceedings of the Academy of Natural Sciences of Philadelphia, v. 67, p.43-92
12 Shin, H.C. (1989) Distribution of Ophiurids on the Continental Shelf and Slope of the East Sea, Korea. Ms thesis, Seoul National University, 59p
13 Huzioka, K. (1972) The Tertiary floras of Korea. Journal of the Mining College, Akita University, Series A, v. 3, p. 1-105
14 Lee, Y.G. (1992) Paleontological study of the Tertiary molluscan fauna in Korea. Science Reports of Institution of Geoscience, University of Tsukuba, Section B, v. 13, p. 15-125
15 Twitchett, R.J., Feinberg, J.M., O'Connor, D.D., Alvarez, W. and McCollum, L. (2005) Early Triassic ophiuroids: their paleoecology, taphonomy and distribution. Palaios, v. 20, p. 213-223   DOI   ScienceOn
16 Chen, Z.Q. and McNamara, K.J. (2006) End-Permian extinction and subsequent recovery of the Ophiuroidea (Echinodermata). Palaeogeography, palaeclimatology, Palaeecology, p. 321-344   DOI   ScienceOn
17 Lee, Y.G. (1986) Micropaleontological study of Neogene strata of southeastern Korea and adjacent sea floor. Journal of the Paleontological Society of Korea, v. 2, p. 83-113
18 Muller, J. and Troschel, F.H. (1840) ber die Gattungen der Ophiuren. Archiv f$\ddot{u}$r Naturgeschichte, v. 6, p. 326-330
19 Smith, A.B., paterson, G.L.J. and Lafay, B. (1995) Ophiuroid phylogeny and higher taxonomy - morphological, molecular and paleontological perspectives. Zoological Jaurnal of the Linnean Society, v. 114, p. 213-243   DOI   ScienceOn
20 Cisternas, P., Selvakumaraswamy, P. and Byrne, M. (2004) Evolution of development and the Ophiuroidea-revisited. Heinzeller T. and Nebelsick, J.H. editors. Taylor and Francis Group, London, UK, p. 521-526
21 Shin, S. and No, B.J. (1996) Illustrated Encyclopedia of Fauna and Flura of Korea, v. 36, Echinodermata. Ministry of Education, 780p
22 Tateiwa, I. (1924) Geological atlas of Chosen no. 2. Ennichi, Kyuryuho and Choyo sheets. Geological Survey of Government, General of Chosen, 6p
23 Chung, C.H. and Choi, D.K. (1993) Paleoclimatic implication of palynoflora from the Yeonil Group (Miocene), Pohang Area, Korea. Journal of the Paleontological society of Korea, v. 9, p. 143-154
24 Lee, Y.G. (1988) Neogene paleotemperature oscillations in the Pohang Basin, Korea. Journal of Korean Earth Science Society, v. 9, p. 203-216
25 Yoon, S. (1975) Geology and paleontology of the Tertiary Pohang Basin, Pohang District, Korea. Part 1. Geology. The Journal of the Geological Society of Korea, v. 11, p. 187-214
26 Kim, B.K. (1965) The stratigraphic and paleontologic studies on the Tertiary (Miocene) of the Pohang area, Korea. Seoul University Journal Science and Technology Series, v. 15, p. 32-121
27 Matsumoto, H. (1915) A new classification of the Ophiuroidea. With description of new genura and species. Proceedings of the Academy of Natural Sciences of Philadelphia, v. 67, p.43-92