Classification of the subfamily Sirembinae
Subfm. †Sirembinae Gill 1863
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G. †Gadophycis Stinton 1965
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†Gadophycis bramscheensis Schwarzhans 2007
†Gadophycis serratus Schwarzhans and Bratischko 2011
G. †Preophidion Frizzell and Dante 1965
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†Preophidion convexus Stinton 1977
†Preophidion meyeri Koken 1888
†Preophidion petropolis Frizzell and Dante 1965
†Preophidion stintoni Frizzell and Dante 1965