Classification of the subfamily Tryblidiinae
Subfm. †Tryblidiinae von Zittel 1899
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G. †Helcionopsis Ulrich and Scofield 1897
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†Helcionopsis depressum Ulrich and Scofield 1897
†Helcionopsis radiatum Lindström 1884
†Helcionopsis reticulatus Easton 1943
†Helcionopsis striata Ulrich and Scofield 1897
†Helcionopsis subcarinata Ulrich and Scofield 1897
†Helcionopsis wisconsinensis Ulrich and Scofield 1897
G. †Pilina Koken and Perner 1925
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†Pilina acuminatum Koken and Perner 1925
†Pilina cheyennica Peel 1977
†Pilina esthonum Koken 1897
†Pilina ovoideum Koken and Perner 1925
†Pilina solarium Lindström 1884
†Pilina unguis Angelin and Lindström 1880