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滇西南西盟里拉、孟连回库腊垒组发现早泥盆世Ｍｏｎｏｇｒａｐｔｕｓｈｅｒｃｙｎｉｃｕｓ、Ｍ．ｆａｌｃａｒｉｕｓ等７个笔石种，从下到上识别出Ｍ．ｕｎｉｆｏｒｍｉｓ带、Ｍ．ｈｅｒｃｙｎｉｃｕｓ带和Ｍ．ｆａｌｃａｒｉｕｓ带３个笔石带，分别属于洛赫科夫期早期、晚期和布拉格期早期，并与国内外其他地区的笔石带进行了对比。对该时期笔石的生物地理分析表明，洛赫科夫期的笔石具有全球性，而布拉格期的笔石则显示出一定程度的地区性。
West Yunnan Lira, Menglian back Kurutai Formation Early Devonian Monograptushercynicus, M. Falcarius and other seven penoliths, identifying M from the bottom up. uniformis band, M. Hercynicus band and M. Falcarius has three pen-stone belts, belonging to the Early, Early and Early Prague Periods, respectively, and is compared with pen-stone belts in other parts of the country. The biogeographic analysis of penoliths during this period shows that Penoliths in Lochkoff period are global while peninsular in Prague period shows some degree of regionalism.