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一九七八年八月,金淳泰等同志在四川綦江观音桥测制志留系剖面时,采得不少笔石。同年九月,笔者陪同贺兰德教授、里卡兹薄士等前往参观该剖面时,又采了一些笔石。这些笔石经笔者鉴定后,分别属于下志留统龙马溪组与桥沟组的笔石,其中的三个新属一半单笔石(Hemimonograptus)(新属)、三形笔石(Trimonograptus)(新属)及似普氏笔石(Quasipenerograptus)(新属),对单笔石类的演化起着重要的方向性的作用。单笔石类的笔石体,仅有一个上攀的笔石枝,但它们的胞菅形状较为复杂,根据它们胞
In August 1978, Comrade Kim Chun-tai and his colleagues took a lot of petroglyphs when they measured the Silurian Section of the Guanyin Bridge in the Yongjiang River in Sichuan Province. In September of the same year, the author accompanied Professor Helande and Thinkers Larkaz to visit the profile and collected some pen and stone. These petroglyphs, identified by the author, belong to the penoliths of the Lower Silurian Longmaxi Formation and Qiaogou Formation, respectively, and three of the three new genera, Hemimonograptus (new genus), Trimonograptus (New genus) and Quasipenerograptus (new genus) play an important role in the direction of the evolution of single-type rocks. The penolith of a single stone type has only one pen and stone branch that climbs up, but their shape is more complicated. According to their cell