Cretaceous non-marine ostracods from Korea = 한국 백악기 담수 개형충 연구

다국어 초록 (Multilingual Abstract)

This study deals with taxonomy, biostratigraphic and paleoecological implications of non-marine ostracod faunas from the Cretaceous strata of Korea (Jinju Formation, Hampyeong Basin, Dalido Formation, Jangseong area, and Nangdo area). In addition, ostracods from the Yanji Basin (Tongfosi and Dalazi formations) of China are described. A total of 22 species belonging to 8 genera of Korea, and 14 species belonging to 9 genera of the Yanji Basin are described herein. With the recovery of well-preserved specimens of the Jinju Formation, hypothetical evolutionary routes and significant characters of the representatives of genera Cypridea and Mongolocypris are identified. In addition, the sieve pore, ontogeny and sexual dimorphism of Vlakomia jilinensis and Vlakomia ustinovskii (Limocytherinae of Family Limnocytheridae) from the Yanji Basin are recognized.
The faunal composition of many deposits in this study consists mainly of the representatives of the Superfamily Cypridoidea. While other two non-marine ostracod groups (cytheroidean and darwinuloideans) are absent or rarely discovered. In addition, the occurrences of endemic species with common East Asian species seem to be influenced by an unstable or stressful environment due to their high ecologic tolerate limits.
Despite some representatives are endemic to each of fauna, many representatives of genera Scabriculocypris, Cypridea, Mongolocypris, Lycopterocypris and Candona show faunal exchanges between Korea, China and Mongolia during late Early to Late Cretaceous. This new faunal investigation and biostratigraphic correlation suggest the ages for deposits of Korea and the Yanji Basin as follows; Albian for the Jinju and Tongfosi formations and the Hampyeong Basin, Albian to Cenomanian? for the Dalido Formation, Cenomanian for the Dalazi Formation, Campanian for the Jangseong area, and Campanian to Maastrichtian? for the Nangdo area.

목차 (Table of Contents)

• Contents ⅰ
• List of Figures ⅳ
• List of Tables ⅶ
• Abstract ⅷ
• 1. Introduction 1
• 1.1. Aims and overview 1
• 1.2. Previous studies on the Cretaceous ostracods from Korea 6
• 1.2.1. Gyeongsang Basin 6
• 1.2.2. Hampyeong Basin 7
• 1.2.3. Yeongdong Basin 8
• 1.2.4. Haenam Basin 8
• 1.2.5. Cheorwon Basin 9
• 1.2.6. South Yellow Sea Basin 9
• 1.2.7. North Korea 10
• 1.3. Basic concepts of ostracoda 11
• 1.3.1. Morphology and ecology of ostracoda 11
• 1.3.2. On the Mesozoic non-marine ostracods 14
• 2. Geological setting 17
• 2.1. Cretaceous strata of Korea 17
• 2.2. Geology of study areas in Korea 20
• 2.2.1. Jinju Formation 20
• 2.2.2. Hampyeong area 22
• 2.2.3. Dalido Formation 23
• 2.2.4. Jangseong area 26
• 2.2.5. Nangdo area 27
• 2.3. Geology of the Yanji Basin, China 30
• 3. Material and methods 33
• 3.1. Cretaceous strata of Korea 33
• 3.2. Yanji Basin, China 37
• 4. Ostracod faunas 40
• 4.1. Cretaceous strata of Korea 40
• 4.1.1. Jinju Formation 40
• 4.1.2. Hampyeong Basin 42
• 4.1.3. Other deposits (Dalido Formation, Jangseong area,
• and Nangdo area) 44
• 4.2. Yanji Basin, China 46
• 4.2.1. Tongfosi Formation 46
• 4.2.2. Dalazi Formation 47
• 5. Systematic paleontology 48
• 5.1. Cretaceous strata of Korea 48
• 5.2. Yanji Basin, China 103
• 6. Discussion 148
• 6.1. Taxonomy and morphology 148
• 6.1.1. Morphologic characters of Cypridea jinjuria and C. samesi 148
• 6.1.2. Taxonomy and early evolution of the Genus Mongolocypris 149
• 6.2. Biostratigraphy 155
• 6.2.1. Cretaceous strata of Korea 155
• 6.2.2. Yanji Basin, China 165
• 6.3. Taphonomy and paleoecology 169
• 6.3.1. Cretaceous strata of Korea 162
• 6.3.2. Yanji Basin, China 177
• 7. Conclusions 181
• 8. References 184
• Abstract (in Korean) 216
• Acknowledgements (in Korean) 218