关于Trigonioides yunnanensis KuetMa的归属

ON THE ATTRIBUTION OF TRIGONIOIDES YUNNANENSIS KU ET MA

一、前言Trigonioides yunnanensis Ku et Ma是我国白垩纪地层中最早报道的类三角蚌类化石,1962年由顾知微教授描述。六十年代后期,“云南红层队”于标准产地云南楚雄朱洗冲又发现了更丰富的标本,由马其鸿记述于《云南中生代化石》(上册)(马其鸿等,1976),鉴定为Trigonioides(Wakinoa), yunnanensis Ku et Ma(图版15,图4—13),T. (W.?)

This paper provides relevant data from the author's observation for determining the phylogenetic position of Trigonioides yunnanensis Ku et Ma, 1962; which was found from the Lower Cretaceous Puchanghe Formation of central Yunnan, SW China and has been regarded as belonging to several different genera or subgenera by different authors during the recent ten years. By careful comparison, this species is believed to be closely related to Koreanaia in principal characters such as hinge structure and surface orn...