Aquifer and surface-water ostracodes in Quaternary paleowetland deposits of southern Nevada, USA

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• 作者：Richard M. Forester ; Claire Carter ; Jay Quade ; Alison J. Smith
• 关键词：Ostracodes ; Wetlands ; Springs ; Aquifer ; Nevada ; Late Pleistocene ; Hypogean
• 刊名：Hydrobiologia
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：786
• 期：1
• 页码：41-57
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Freshwater & Marine Ecology; Ecology; Zoology;
• 出版者：Springer International Publishing
• ISSN：1573-5117
• 卷排序：786

文摘

A diverse assemblage of Late Quaternary continental ostracodes (Class Crustacea) belonging to at least 15 genera and 40 species (including 11 new species and one new genus, Plicocandona, described here) was found in sediments of former groundwater discharge deposits located in valleys of southern Nevada, U.S.A. The fossiliferous deposits are located in Las Vegas, Coyote Springs, Indian Springs, Sandy, and Pahrump Valleys. The ostracodes include species that were probably living in wetmeadow, seep, flowing-spring, stream, and wetland environments, and include aquifer species. Those environments indicate a higher level of effective moisture than occurs today during several episodes of the Late Pleistocene to Early Holocene, from ~140 to ~9 ka. The ostracode assemblages are significant to our understanding of regional paleohydrology and also contribute to the growing knowledge of aquifer taxa diversity and biogeography.