한국에서 처음 발견된 조각류 공룡 이빨 화석

국문 초록 (Abstract)

2002년 8월 경남 하동군 금남면 중평리에 속한 무인도인 장구섬(하산동층)에서 국내에서는 처음으로 조각류 공룡의 이빨이 발견되었다. 이 이빨은 경상누층군에서 가장 많이 발견되고 있는 조각류 공룡발자국의 실체를 파악하는 첫 번째 실마리라는 점에서 매우 중요하다. 발견된 이빨은 Iguanodontoidea에 속하는 상악치이며 치관이 매우 닳아있다. 표본(KIGAM VP 200402)을 동아시아의 전기 백악기 Iguanodontoidea에 비교한 결과 치관의 labial side 중심에 발달한 median carina와 2차능선이 발달하지 않는다는 점에서 중국 내몽골 Dashuigou층(Albian)에서 발견된 프로토박트로사우루스(Protobactrosaurus gobiensis) 상악치와 가장 유사하다. KIGAM VP 200402에서 나타나는 특징은 본 표본이 Hadrosauridae를 제외한 iguanodontoids 중 원시적인 iguanodontoid 보다는 진화된 iguanodontoid taxon에 속함을 지시한다.

다국어 초록 (Multilingual Abstract)

The first ornithopod tooth was found in the Hasandong Formation (Lower Cretaceous) at Janggu Island, Jungpyeong-ri, Geumnam-myeon, Hadong County, South Gyeongsang Province in August, 2002. It is a very important discovery because it is the first clue to get insights into the track-makers of abundant ornithopod footprints that have been frequently found in the Gyeongang Supergroup. The tooth is a very worn maxillary tooth belonging to the Iguanodontoidea. Comparing to the Early Cretaceous lguanodontoidea in East Asia, the specimen (KIGAM VP 200402) is the most similar to the maxillary teeth of Protobactrosaurus gobiensis from the Dashuigou Formation (Albian), Nei Mongol in China in terms of a strong median carina without subsidiary ridges developed on the labial crown surface. These dental features shown in the KIGAM VP 200402 indicate that it is belonging to one of the derived nonhadrosaurian iguanodontoids rather than the primitive ones.

목차 (Table of Contents)

• 요약
• 서론
• 지질개요 및 고환경
• 기재
• 전기 백악기 동아시아 Iguanodontoidea와의 비교
• 토의
• 감사의 글
• Abstract
• 참고문헌

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