摘要
ConiopteriswasaubiquitousplantoftheJurassicandCretaceousperiodsandplayedanimportantroleinthefloraofthetime.However,itsanatomicalstructureisrelativelypoorlyknown.ThespecimensofConiopterishymenophylloides（Brongniart）SewarddescribedherewerecollectedfromtheYaojieFormationinGansuProvince,northwesternChina.Thesterilefrondsarecharacterizedasbeingatleastbipinnatewithalternatearrangedlinearpinnaecoveredbythincuticles.Fertilefrondsareiinear-lanceolate,withsinglesorusatthemarginofeachfertilepinnule.Insitusporesaretypicallytrilete,triangletosubcircularinpolarview,cap-shapedinequatorialview,and37/tminaveragediameter.Thetriletemarkingisstraightandnarrow,generallyextendsto4/5ofthesporeradius.Thesporesurfaceissmooth,andpartsoftheexinearegranulated.Theepidermalcellsofcuticlesareirregularinshape,approximately40-60μmlongand10-20μmwide.Theellipticalstomatalcomplexesareparacytic,approximately30μmlongand19μmwide,andirregularlydistributed.Onthebasisofitsepidermalstructuresandcomparisonswithextantferns,weconsiderthatConiopterisdisplayscombinedfeaturesoftherelatedextantgenera.
出版日期
2018年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
