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Abstract ▼ AI-Helper

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...

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 Iguanodontoidea 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.

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