An Appalachian population of neochoristoderes (Diapsida, Choristodera) elucidated using fossil evidence and ecological niche modelling
An Appalachian population of neochoristoderes (Diapsida, Choristodera) elucidated using fossil evidence and ecological niche modelling
复制标题
使用化石证据和生态位模型阐明了阿巴拉契亚新脉足动物（Diapsida、Choristodera）种群
DOI：
10.1111/pala.12545
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发表时间：
2021
期刊：
影响因子：
2.6
通讯作者：
Steven Ballwanz
中科院分区：
文献类型：
--
作者：
Thomas W. Dudgeon;Zoe Landry;Wayne R. Callahan;C. Mehling;Steven Ballwanz
美国新泽西州白垩纪晚期描述了四个新脉动物的椎体中心。一个样本是从新泽西州霍姆德尔地区纳韦辛克组的基底海侵滞后中发现的，另外两个样本是在附近发现的，可能来自同一层位。第四个是在埃利斯代尔恐龙遗址附近的马歇尔敦序列中发现的。这些椎骨将北美洲晚白垩世新脉龙的地理范围向东扩展了 2000 多公里，代表了来自大西洋沿海平原的第一个新脉龙遗迹。为了辨别新泽西州是否会出现新脉龙，并阐明为什么新脉龙在阿巴拉契亚地区如此罕见，我们采用了生态位模型来预测Champsosaurus（唯一已知的晚白垩世新脉龙属）的适宜栖息地范围。我们发现，在阿巴拉契亚，鳄龙的理想栖息地可能位于比大西洋沿岸平原稍远的北部和西部，而新泽西州可能位于或接近这一适宜栖息地空间的边缘。这些结果表明，新泽西州新脉龙的出现与已知的晚白垩世新脉龙的栖息地要求一致。因此，这些椎骨可能代表了生活在更内陆的新脊椎动物种群的南缘，那里没有保存白垩纪晚期的沉积物。鼓励继续从大西洋沿岸的晚白垩世沉积物中回收材料，并对现有收藏品进行审查，以澄清阿巴拉契亚新脉龙的真实分布。
Four neochoristoderan vertebral centra are described from the latest Cretaceous of New Jersey, USA. One specimen was recovered from the basal transgressive lag of the Navesink Formation in the area of Holmdel, New Jersey, and two others were recovered nearby and probably were derived from the same horizon. The fourth was recovered from the Marshalltown sequence in the vicinity of the Ellisdale Dinosaur Site. These vertebrae expand the geographical range of Late Cretaceous neochoristoderes in North America by over 2000 km further east, and represent the first neochoristoderan remains from the Atlantic coastal plain. To discern whether neochoristodere remains are to be expected in New Jersey, and elucidate why neochoristoderes are apparently so rare in Appalachia, we implemented ecological niche modelling to predict the range of suitable habitat for Champsosaurus, the only known genus of Late Cretaceous neochoristoderes. We found that in Appalachia, the ideal habitat of Champsosaurus probably existed slightly further north and west than the Atlantic coastal plain, and New Jersey is probably on or near the margin of this suitable habitat space. These results suggest that the occurrence of neochoristoderes in New Jersey is consistent with the habitat requirements of known Late Cretaceous neochoristoderes. These vertebrae may therefore represent the southern margin of a population of neochoristoderes that lived further inland, where latest Cretaceous sediments are not preserved. The continued recovery of material from Late Cretaceous deposits along the Atlantic coast, and review of existing collections, is encouraged to clarify the true distribution of neochoristoderes in Appalachia.
影响因子：
4.3
作者：
Lunt, Daniel J.;Farnsworth, Alex;Wrobel, Neil
通讯作者：
Wrobel, Neil