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讯(记者 姜燕)5月16日,中国地质大学(北京)邢立达课题组、广东省四会市博物馆、中山大学以及广东中大深地科学研究院等机构的研究人员宣布,学者将广东省三水盆地发现的一批晚白垩世的大型兽脚类恐龙牙齿归入暴龙超科。这是三水盆地大型兽脚类的首次发现,也是中国暴龙类最南端的化石记录。目前,该论文发表于国际地学刊物《白垩纪研究》。

三水盆地晚白垩世的恐龙蛋化石记录显示,该区域活跃着伤齿龙类、窃蛋龙类和鸭嘴龙类等恐龙。本次发现的暴龙超科牙齿和它们组成了一个恐龙生物群。这证明在白垩纪末期的大绝灭前,恐龙生物群在中国华南很可能相当繁盛。据介绍,广东省是中国白垩纪各种化石的重要产区,其中恐龙化石主要发现于广东省北部的南雄盆地和河源盆地。广东南部的三水盆地恐龙化石的记录却很少。

三水盆地此次发现的化石为4枚牙齿,均产自大塱山组,时代为晚白垩世最晚期马斯特里赫特阶,距今7000万到6600万年前。其中三枚由古生物爱好者赵灿辉于四会市大沙地区发现并捐赠给四会市博物馆。另外一枚产自广州市天河区国际金融城建筑工地。最初由古生物爱好者倪子杰发现了一批化石碎片。随后,广东中大深地科学研究院曾强博士多次考察该化石点,并采集了该枚化石。该化石目前收藏于中山大学地球科学与工程学院地质矿物博物馆,模型典藏于广东正佳自然科学博物馆。

图说:曾强展示牙齿化石。董天健摄

研究人员发现,兽脚类恐龙牙齿一般呈香蕉或月牙状,中间宽并向两边收敛,收敛的末端形成隆突。以牙齿在牙槽中的位置为定向基础,牙齿的前后分别称为近中侧和远中侧,内外分别称为舌侧和唇侧。其中,发现于四会市的三枚恐龙牙齿相对完整,牙冠长度均超过了6厘米。广州发现的为3.3厘米长的牙齿碎片。

但这四颗牙齿具有一致的形态特征,“牙齿边缘有锯齿,锯齿呈凿状且每个锯齿间有齿间沟;前后锯齿分别在近端隆突和远端隆突上,且近端隆突向舌侧偏转、远端隆突向唇侧偏转;作为大型兽脚类牙齿,锯齿密度较低;牙釉质光滑,表面没有纵脊等。”研究人员认为:“这符合暴龙超科的牙齿特征,且和其他的大型兽脚类牙齿特征相悖。”

研究团队还针对牙齿的形态特征进行了系统发育分析和判别分析。其中,系统发育分析使用了97个兽脚类种的145个特征数据,结果支持四颗牙齿属于暴龙超科。研究人员又判别分析使用了399个标本的11个测量数据。由于四颗牙齿的不完整性,缺少部分测量数据导致判别分析结果不明确。“但可以确定与暴龙超科并不冲突。”

中国地质大学(北京)副教授、广东正佳自然科学博物馆客座研究员邢立达告诉记者,暴龙超科是一类体型差异较大的掠食性兽脚类恐龙,是白垩纪中晚期的优势类群。全长可超过12米的晚白垩世霸王龙(Tyrannosaurus rex)就是暴龙超科中体型最大,也是最著名的物种,但也有像早白垩世奇异帝龙(Dilong paradoxus)这种全长在1.5米左右的种类。

暴龙超科的牙齿为异形齿,不同位置牙齿的大小和形态有一定的区别。本次发现的牙齿在整个口腔中的具体位置无法确定,也令研究团队无法准确估计牙齿主人的体长。中国地质大学(北京)博士生王董浩告诉记者,保守估计四会的暴龙超科牙齿其体长约5至6米,而广州市区的记录则可能是更大一些的个体。

中国华南地区缺少晚白垩世大型兽脚类的记录,此前仅在赣州地区发现过暴龙超科的虔州龙(Qianzhousaurus)和暴龙类足迹,河源地区发现过暴龙类牙齿等。本次牙齿的发现是三水盆地大型兽脚类的首次发现,也是中国暴龙类最南端的化石记录,还是中国最晚的暴龙类化石记录之一。


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2026-07-07 18:08:57中国最南端的暴龙类有新发现

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March Madness has officially arrived.

No. 12-seed High Point upset No. 5-seed Wisconsin 83-82 in the first round of the NCAA Men's Tournament at Moda Center on Tuesday. 

High Point guard Chase Johnston scored the game-winning basket with 11 seconds on a breakaway layup after Wisconsin guard Nick Boyd missed a layup that would have put the Badgers up 84-81. High Point guard Rob Martin hauled in the rebound and fired downcourt to a streaking Johnston. 

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Chase Johnston celebrates a 3-pointer

High Point guard Chase Johnston reacts after shooting a 3-pointer during the first half in the first round of the NCAA college basketball tournament against Wisconsin, Thursday, March 19, 2026, in Portland, Oregon. (AP Photo/Craig Mitchelldyer)

The game-winning layup was Johnston's first two-point make all-season long. Johnston nailed multiple clutch 3-pointers down the stretch, scoring 14 points off the bench and going 4-6 from behind the arc.

Martin, who assisted on the game-winning layup, led the Panthers in scoring with 23 points while also dishing 10 assists. Owen Aquino (11 points), Terry Anderson (15 points) and Cam'Ron Fletcher (14 points) were the other players who scored in double-figures for High Point.

THE NCAA LEARNED A LESSON WITH SMU: DON'T TRUST TEAMS WITH INJURY REPORTS, AS BJ EDWARDS SAGA PROVED

Cam'ron Fletcher scores

High Point forward Cam'ron Fletcher reacts during the first half in the first round of the NCAA college basketball tournament against Wisconsin, Thursday, March 19, 2026, in Portland, Oregon. (AP Photo/Craig Mitchelldyer)

The victory over Wisconsin is the first-ever NCAA tournament victory for High Point in their second-ever tournament appearance. Last year was the Panthers' first-ever appearance.  

Boyd and John Blackwell led the way for Wisconsin in the loss. Boyd scored 27 points with five rebounds and six assists while Blackwell scored 22 points and 10 rebounds. Austin Rapp added 12 points. 

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Nick Boyd drives to the basket

Wisconsin guard Nick Boyd (2) tries to get past High Point forward Owen Aquino (8) during the second half in the first round of the NCAA college basketball tournament Thursday, March 19, 2026, in Portland, Oregon. (AP Photo/Amanda Loman)

For Wisconsin, this is their second loss in three years in the first round as a No. 5 seed. Wisconsin lost to James Madison 72-61 in the first round in 2024. Last year, Wisconsin lost to BYU 91-89 in the second round. 

The last time Wisconsin made it out of the second round was 2017, when they lost in the Sweet Sixteen. 

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