{"title":"VII.—Eurystoma trigona sp. nov., a Pteridosperm ovule borne on a frond of Alcicornopteris Kidston","authors":"J. G. Long","doi":"10.1017/S0080456800014654","DOIUrl":null,"url":null,"abstract":"Synopsis Ovules of Eurystoma trigona sp. nov. are described. Over 330 unpollinated ovules were found attached to a petrified megasporophyll which appears to be a juvenile form of Alcicornopteris Kidston. Each ovule is triangular in cross section and has three wing-like extensions of the integument. None shows a female prothallus. The possibility that Alcicornopteris represents the fertile foliage of Stenomyelon is discussed.","PeriodicalId":23232,"journal":{"name":"Transactions of the Royal Society of Edinburgh","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1969-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of the Royal Society of Edinburgh","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1017/S0080456800014654","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
VII.—Eurystoma trigona sp. nov., a Pteridosperm ovule borne on a frond of Alcicornopteris Kidston
Synopsis Ovules of Eurystoma trigona sp. nov. are described. Over 330 unpollinated ovules were found attached to a petrified megasporophyll which appears to be a juvenile form of Alcicornopteris Kidston. Each ovule is triangular in cross section and has three wing-like extensions of the integument. None shows a female prothallus. The possibility that Alcicornopteris represents the fertile foliage of Stenomyelon is discussed.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
