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首页> 外文期刊>Acta Palaeontologica Polonica >Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA
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Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA

机译：来自美国南卡罗来纳州多切斯特县钱德勒桥组的晚渐新世鲨鱼和射线

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摘要

A diverse vertebrate fauna, dominated by elasmobranch taxa, was collected from the upper Oligocene (Chattian) Chandler Bridge Formation ill Summerville, Dorchester County, South Carolina. Nearly 3,500 teeth and dermal denticles are assigned to 29 species of sharks and rays, and Our sample includes the oldest known Occurrence of the whale shark, Rhincodon, as well as a new skate, Raja mccollumi sp. nov. The Chandler Bridge elasmobranch assemblage is comparable in species diversity to Chattian assemblages of Virginia and North Carolina, USA, and Germany. Notable absences from Germany include Rhincodon, Hemipristis, and Sphyrna zygaena, likely reflecting the influence of colder water on the North Sea Basin during the Chattian. Squaloids, pristiophoroids, and hexanchoids are Known from Chattian deposits of the Albemarle Embayment (North Carolina), Salisbury Embayment (Virginia), and North Sea Basin, but these taxa are absent from the Chandler Bridge assemblage, perhaps because of shallow, warm water (20 to 25 degrees C) conditions within the more southerly Charleston Embayment.
机译：从南卡罗来纳州多切斯特县萨默维尔的上新世（乍得）钱德勒桥地层中收集到了多种以脊椎动物支类为主体的脊椎动物。将近3500颗牙齿和真皮齿归入29种鲨鱼和rays鱼，我们的样本包括已知最古老的鲸鲨鱼Rhincodon和新的溜冰鞋Raja mccollumi sp。十一月与美国弗吉尼亚州和北卡罗来纳州，美国和德国的查特安族组合相比，钱德勒桥弹支组合在物种多样性上可比。来自德国的显着缺勤包括Rhincodon，Hemipristis和Sphyrna zygaena，这很可能反映了查天河期间较冷的水对北海盆地的影响。从Albemarle Embayment（北卡罗莱纳州），Salisbury Embayment（弗吉尼亚州）和North Sea Basin的查特恩矿床中已知类胡萝卜素，Pristiophoroids和hexanchoids，但是Chandler Bridge组合中缺少这些类群，可能是由于浅而温暖的水（ 20到25摄氏度）条件在更南端的查尔斯顿（Charleston）隔离区内。

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