DOI: 10.1016/j.palaeo.2016.06.019
论文题名: Evidence for semi-sessile early juvenile life history in Cretaceous ammonites
作者: Stinnesbeck W. ; Frey E. ; Zell P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 457 起始页码: 186
结束页码: 194
语种: 英语
英文摘要: Here we present evidence for a semi-sessile early juvenile stage of ammonites. Our hypothesis is based on fossil evidence in early diagenetic limestone concretions discovered in platy limestone deposits of Cenomanian age in the northern state of Coahuila, Mexico. In these locations densely packed post-embryonic shell assemblages were attached to fossilized algal or bacterial mats and preserved in sediments deposited under permanently anoxic bottom conditions. Tiny ammonites, as well as gastropods and byssate pectinid bivalves are abundant and restricted to these mats. They do not occur elsewhere in the sediment. The ammonite hatchlings were apparently unable to escape from mats sinking to the hostile sea floor and must thus have been semi-sessile, similar to the associated gastropods and bivalves. © 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68339
Appears in Collections: 过去全球变化的重建
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作者单位: Institut für Geowissenschaften, Universität Heidelberg, Im Neuenheimer Feld 234, Heidelberg, Germany; Staatliches Museum für Naturkunde, Erbprinzenhof 13, Karlsruhe, Germany
Recommended Citation:
Stinnesbeck W.,Frey E.,Zell P.. Evidence for semi-sessile early juvenile life history in Cretaceous ammonites[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,457