Classification of the genus Sulcatothyris
G. †Sulcatothyris Dagys 1974
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†Sulcatothyris aulacothyroidea Bittner 1890
†Sulcatothyris emarginata Jin et al. 1979
†Sulcatothyris tkachensis Dagys 1974
Invalid names: Ninglangothyris Jin and Fang 1977 [synonym]