A research team in China recently determined that four large dinosaur teeth discovered in the Sanshui Basin in South China's Guangdong province belong to the same group of carnivorous, bipedal dinosaurs as Tyrannosaurus rex.
中国的一个研究小组最近确定，在中国南方广东省三水盆地发现的四颗大型恐龙牙齿与霸王龙属于同一类食肉两足恐龙。
This finding was published in the international geological journal Cretaceous Research on Thursday.
这一发现于周四发表在国际地质杂志《白垩纪研究》上。
Xing Lida, an associate professor at China University of Geosciences Beijing, who led the research, said the fossilized teeth found in the cities of Sihui and Guangzhou date back to the end of the Late Cretaceous period, approximately 66 to 70 million years ago.
领导这项研究的中国地质大学副教授邢立达说，在四会和广州发现的牙齿化石可以追溯到白垩纪晚期，大约6600万至7000万年前。
South China lacks evidence of large theropod dinosaurs from the Late Cretaceous, with the teeth found in the basin marking the first discovery of large theropod dinosaurs in the area and one of the southernmost fossil records of the Tyrannosauroidea in China.
华南地区缺乏白垩纪晚期大型兽脚亚目恐龙的证据，在该盆地发现的牙齿标志着该地区首次发现大型兽脚类恐龙，也是中国最南端的暴龙科化石记录之一。
He said dinosaur egg fossils from the Late Cretaceous period discovered in the basin also indicate that dinosaurs belonging to groups including the Troodontidae, Oviraptorosauria and Hadrosauridae lived in the region.
他说，在该盆地发现的白垩纪晚期恐龙蛋化石也表明，属于伤齿龙科、偷蛋龙下目和鸭嘴龙类等恐龙群的恐龙生活在该地区。
Xing said theropod dinosaur teeth typically have a banana or crescent shape, wider in the middle and narrower toward the edges. The three relatively intact teeth found in Sihui each exceed 6 centimeters in crown length, while tooth fragments were found in Guangzhou.
邢说，兽脚类恐龙的牙齿通常呈香蕉形或新月形，中间较宽，边缘较窄。在四会发现的三颗相对完整的牙齿牙冠长度均超过6厘米，而在广州发现的牙齿碎片。
The research team, with members from China University of Geosciences Beijing, the Sihui City Museum, Sun Yat-sen University and the Guangdong-Hong Kong-Macau Institute of Earth Sciences, analyzed 145 features from 97 theropod species, with the results supporting the classification of the four teeth as belonging to the Tyrannosauroidea.
该研究小组由北京中国地质大学、四会市博物馆、中山大学和广东-香港-马考地球科学研究所的成员组成，分析了97种兽脚亚目恐龙的145个特征，结果支持将这四颗牙齿归类为暴龙科。
该研究小组由北京中国地质大学、四会市博物馆、中山大学和广东-香港-马考地球科学研究所的成员组成，分析了97种兽脚亚目恐龙的145个特征，结果支持将这四颗牙齿归类为暴龙科。
