【摘要】 详细补充描述了下泥盆统腕足动物ＴｒｉｄｅｎｓｉｌｉｓＳｕ，１９７６属的特征，附有内部构造系统切面图；分析和论述了Ｔｒｉｄｅｎｓｉｌｉｓ属和Ｕｎｃｉｎｕｌｕｓ属之间的异同，认为两个属之间的不同不仅在于背壳内部主突起的形态，而且两届的外部形态、壳饰的类型、腹壳肌痕区的保存状况、阔肌痕的大小以及肌隔发育状况都有较大差异；研究了Ｈａｖｌｉｃｅｋ（１９８３）归入Ｔｒｉｄｅｎｓｉｌｉｓ属的Ｕｎｃｉｎｕｌｕｓ（Ｇｌｏｓｓｉｎｕｌｕｓ）ｃｈｌｕｐａｃｉＨａｖｌｉｃｅｋ，１９５５，ＧｌｏｓｓｉｎｏｔｏｅｃｈｉａｌａｔａＳｃｈｕｍａｎｎ，１９６５和Ｇ．ｉｎｔｅｒｍｅｄｉａＢｒｉｃｅ，１９８１后，对Ｔｒｉｄｅｎｓｉｌｉｓ属在波希米亚、西班牙和法国的存在提出了质疑；认为Ｔｒｉｄｅｎｓｉｌｉｓ属的确切分布是中国北方大部分地区，其主体时代为Ｅｍｓｉａｎ期。更多还原

【Abstract】 Since its establishment in 1976,the genus Tridensilis has been regarded as an endemicelement distributed only in North China,but it is difficult to recognize and make use of dueto the lack of detailed descriptions and serial transverse sections. In 1983, Ha.licek (p.156) assigned to Tridensilis three species, Uncinulus (Glossinulus) chlupaci Ha.licek,1955, Glossinotoechia iata Schumann, 1965 and G. intermedia Brice, 1981,which were separately distributed in Bohemia,Spain and France.更多还原