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Genus: Eochiton Smith & Toomey, 1964 † (DB: 1 SP)
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Eochiton arbucklensis
Smith & Toomey, 1964 † (FOSSIL)
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Genus: Gotlandochiton Bergenhayn , 1955 † (DB: 2 SP)
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Gotlandochiton hami
Smith & Toomey, 1964 † (FOSSIL)
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Gotlandochiton interplicatus
J.R.M. Bergenhayn, 1955 † (FOSSIL)
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Genus: Ivoechiton Bergenhayn , 1955 † (DB: 3 SP)
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Ivoechiton calathicolus
Smith & Toomey, 1964 † (FOSSIL)
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Ivoechiton levis
J.R.M. Bergenhayn, 1955 † (FOSSIL)
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Ivoechiton oklahomensis
Smith & Toomey, 1964 † (FOSSIL)
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Genus: Paleochiton Smith & Toomey, 1964 † (DB: 2 SP)
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Paleochiton kindbladensis
Smith & Toomey, 1964 † (FOSSIL)
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Paleochiton siskiyouensis
Hoare, 2000 † (FOSSIL)
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