CERATOPSIAN DINOSAURS AND ASSOCIATED LOWER-VERTEBRATES FROM ST-MARY RIVER FORMATION (MAESTRICHTIAN) AT SCABBY BUTTE, SOUTHERN ALBERTA
CERATOPSIAN DINOSAURS AND ASSOCIATED LOWER-VERTEBRATES FROM ST-MARY RIVER FORMATION (MAESTRICHTIAN) AT SCABBY BUTTE, SOUTHERN ALBERTA
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DOI：
10.1139/e75-142
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发表时间：
1975-01-01
影响因子：
1.4
通讯作者：
LANGSTON, W
中科院分区：
文献类型：
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作者：
LANGSTON, W
Sabby Butte是加拿大阿尔伯塔省南部晚白垩世有限暴露的沉积物，是大型角龙Pachyrhinosaurus Sternberg的重要来源。新的颅骨材料证实了这个分类单元在短面角足目中的位置，而间接证据表明，它有一种令人想起Styracosaurus的尖刺褶皱。与骨床沉积物中的肥鼻龙头骨相关的后颅骨可能属于该属，表明其身体巨大，接近三个维度。另一种角齿目动物准角龙的标本很少出现，除了鸟类以外，所有的脊椎动物都在斑点石器上用零碎的物质表示。在21个低等脊椎动物分类群中，有14个是圣玛丽河组的新记录(Squatirhina、Squatina、Amia、Belonostomus、ParalBula、Plataco don、Opisthotriton、Boremys、PlioPlaecarpus、暴龙、腔尾龙、鸟类动物、troödon、埃德蒙顿龙、埃德蒙顿甲龙)。
Scabby Butte, a limited exposure of late Cretaceous sediments in southern Alberta, Canada, is an important source for the large ceratopsian dinosaurPachyrhinosaurusSternberg. New cranial material confirms this taxon's place among short-faced ceratopsids, and circumstantial evidence suggests that it possessed a spiked frill reminiscent ofStyracosaurus. Postcranial bones associated withPachyrhinosaurusskulls in a bonebed deposit probably belong to the genus and indicate a massive body approachingTriceratopsdimensions. Another ceratopsian,Anchiceratops, is sparsely represented.All classes of gnathostomes, except birds, are represented by fragmentary material at Scabby Butte. Of 21 lower vertebrate taxa, fourteen are new to the St. Mary River Formation (Squatirhina,Squatina,Amia,Belonostomus,Paralbula,Platacodon,Opisthotriton,Boremys,Plioplatecarpus, a tyrannosaur, a coelurosaur, an ornithomimid,Troödon,Edmontosaurus,Edmontonia).