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†Theoceras Cheng 2000
urn:lsid:organismnames.com:name:1460969
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†Theoceras Cheng 2000
Cheng 2000. Discovery and significance of the members of the Allotrioceratidae from Ordovicain [Ordovician] Qinhuangdao region, Hebei, north China. Acta Palaeontologica Sinica, 39(3), July 2000: 396-402