Guazia,the earliest ovule without cupule but with unique integumentary lobes  

作　　者：De-Ming Wang Le Liu Yi Zhou Min Qin Mei-Cen Meng Yun Guo Jin-Zhuang Xue 

机构地区：[1]Key Laboratory of Orogenic Belts and Crustal Evolution,Department of Geology,Peking University,Beijing 100871,China [2]School of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China [3]Institute of Geology and Paleontology,Linyi University,Linyi 276000,China [4]Institute of Deep Time Terrestrial Ecology,Institute of Palaeontology,Yunnan Key Laboratory of Earth System Science,Yunnan University,Kunming 650500,China

出　　处：《National Science Review》2022年第4期8-15,共8页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(42130201,42072016 and 41802015)。

摘　　要：The earliest ovules in the Late Devonian(Famennian)are surrounded by a cupule that is involved in both protection and pollination,and generally have free integumentary lobes.Here we report a new taxon from the Famennian of China,Guazia dongzhiensis gen.et sp.nov.The terminally borne ovule is apparently acupulate(without cupule)and has four radially arranged wing-like integumentary lobes that are extensively fused,and folded lengthwise and inwards.Guazia provides evidence that not all Devonian seeds possess a cupule and it increases their diversity in integumentary lobes.This genus also suggests that the integuments develop new functions,probably including wind dispersal at the expense of the cupules.

关 键 词：OVULE cupule INTEGUMENT DEVONIAN seed plants 

分 类 号：Q914[天文地球—古生物学与地层学]