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淮南煤田太原组含丰富的牙形石,经鉴定共有16属35种(含6个未定种),其动物群以Streptognathodids和Sweetognathids类为主。依台型分子的首次出现,该区牙形石自下而上可划分为2个组合带,即Streptognathodus elongatus-S·wabaunsensis-S·barskovi(L_(13)-L_(4-3))和Sweetognathus merrilli-Diplognathodustriangularis(L_1或L_(2-1))组合带(T_1