Genus: Teretia A. Norman, 1888 (syn: Teres - DB: 20 SP, 2 IMG)
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Genus: Teretiopsis Y.I. Kantor & A.V. Sysoev, 1989 (DB: 5 SP, 1 IMG)
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Genus: Thatcheria G.F. Angas, 1877 (syn: Cochlioconus - DB: 5 SP, 2 IMG)
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Subgenus: Thatcheria (Conicheria) Olsson, 1964 † (DB: 1 SP, 0 IMG)
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Genus: Thatcheriasyrinx A. Powell, 1969 (DB: 1 SP, 2 IMG)
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Genus: Thatcherina J.L. Vera-Peláez, 1998 (DB: 1 SP, 0 IMG)
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Genus: Thesbia J.G. Jeffreys, 1867 (DB: 5 SP, 3 IMG)
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