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早石炭世含蜒灰岩,在我国华南地区已有几处报道。在华北,下石炭统一般均不存在,在本溪Eostaffella是从中石炭世开始出现的。在西北,北祁连地区下石炭统独具特色,既不象华南那样发育齐全,亦不同华北那样完全缺失。北祁连地区,维宪期的存在已被大量的化石资料证实。主要的依据为珊瑚类和腕足类。这些生物群的面貌和华南地区维宪期的生物群略同。我分队今年在北祁连中段大草滩进行1∶20万地质填图中,在维宪期下部发现了原始蜒类的种属。经中国科学院南京古生物研究所鉴定为Eostaffella(始史塔夫蜒),现将其产出层位叙述如下:
The Early Carboniferous inite-bearing limestone has been reported several times in southern China. In North China, the Lower Carboniferous generally did not exist. Eostaffella in Benxi began to appear from the Middle Carboniferous. In the northwest, the Lower Carboniferous region has unique features of the Lower Carboniferous. It is neither completely developed nor completely missing in North China. In the northern Qilian area, the existence of Victoria constitution has been confirmed by a large amount of fossil data. The main basis for coral and brachiopods. The appearance of these biota is similar to that of the biota in South China. This year, in a 1: 200,000 geological mapping conducted by the detachment at Grandmas Beach in the middle section of the North Qilian this year, the species of the primitive sericulture was found in the lower part of the Vijnseian period. The Institute of Paleontology, Chinese Academy of Sciences identified as Eostaffella (Stratofuera), now the output layer description is as follows: