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Class: MONOPLACOPHORA
------ Family: PALAEACMAEIDAE Grabau & Shimer, 1909 † (Sea) (FOSSIL)
DB counters: Genus=2, Subgenus=0, Species=7, Subspecies=0 ( 1 Species and 0 Subspecies have images)
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Genus: Palaeacmaea Hall & Whitfield, 1872 † (DB: 6 SP)
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Palaeacmaea discoides
J. Perner, 1903 † (FOSSIL)
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Palaeacmaea horizontalis
J. Perner, 1903 † (FOSSIL)
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Palaeacmaea magnifica
Twenhofel, 1928 † (FOSSIL)
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Palaeacmaea postuma
Böhm, 1895 † (FOSSIL)
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Palaeacmaea rugosa
D.E. Harper † (FOSSIL)
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Palaeacmaea typica
J.W. Hall & R.P. Whitfield, 1872 † (FOSSIL)
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Genus: Parmophorella Matthew, 1886 † (DB: 1 SP)
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Parmophorella acadica
(I. Dawson, 1868 †) (FOSSIL)
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Discina acadica I. Dawson, 1868 † =» Parmophorella acadica
(I. Dawson, 1868 †)
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