Neogene Corylopsis seeds from eastern Tennessee  

作　　者：Zack J.Quirk Elizabeth J.Hermsen 

机构地区：[1]Department of Environmental&Plant Biology,Ohio University,Athens,OH 45701,USA [2]Paleontological Research Institution(PRI),1259 Trumansburg Road Ithaca,NY 14850,USA [3]Plant Biology Section,School of Integrative Plant Science,Cornell University,Ithaca,NY 14853,USA

出　　处：《Journal of Systematics and Evolution》2021年第3期611-621,共11页植物分类学报（英文版）

基　　金：This research was supported by the Ohio University Research Committee(OURC award to EJH)and the National Science Foundation(DEB-1829376 to EJH).

摘　　要：A new fossil species of Corylopsis(Hamamelidaceae),C.grisea Quirk&Hermsen sp.nov,based on seeds from the early Pliocene Gray Fossil Site(GFS),eastern Tennessee,USA,is described.The assignment of the seeds to Hamamelidaceae,subfamily Hamamelidoideae,is based on the overall size of the seeds,smooth testa,lack of a seed wing,and the presence of a terminal hilar scar.The assignment to the genus Corylopsis is based on seed size as well as the presence of a hilar facet,in addition to the hilar scar.Although Corylopsis persists only in East Asia today,its fossil record indicates that the genus was widespread across the Northern Hemisphere in the past.Prior to its discovery at GFS,Corylopsis was only known from the Paleogene in North America.The presence of C.grisea at GFS extends the fossil record of Corylopsis in North America to the Neogene and reinforces the interpretation of GFS as a forested refugium that provided a relatively moist,equable environment where subtropical to warm temperate plants could persist during a time of cooling and drying in the continental interior of North America.Its presence provides additional evidence for the biogeographic connection between the GFS paleoflora and the modern flora of eastern Asia.

关 键 词：BIOGEOGRAPHY Corylopsis Gray Fossil Site Hamamelidoideae PLIOCENE seed 

分 类 号：Q94[生物学—植物学]