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Genus: Cephalaspis Agassiz , 1843 † (DB: 14 SP)
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Cephalaspis acadica
R. Robertson, 1936 † (FOSSIL)
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Cephalaspis campbelltonensis
J.J.F. Whiteaves, 1881 † (FOSSIL)
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Cephalaspis whiteavesi Traquair, 1890 † =» Cephalaspis campbelltonensis
J.J.F. Whiteaves, 1881 †
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Cephalaspis canadensis
R. Robertson, 1936 † (FOSSIL)
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Cephalaspis dawsoni
E.R. Lankester, 1870 † (FOSSIL)
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Cephalaspis jexi
Traquair, 1893 † (FOSSIL)
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Cephalaspis laticeps
Traquair, 1890 † (FOSSIL)
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Cephalaspis lightbodii
E.R. Lankester, 1870 † (FOSSIL)
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Cephalaspis lyelli
(A.E.R. Agassiz, 1835 †) (FOSSIL)
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Cephalaspis murchisoni
Egerton, 1857 † (FOSSIL)
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Cephalaspis novaescotiae
Denison, 1955 † (FOSSIL)
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Cephalaspis pagei
E.R. Lankester, 1870 † (FOSSIL)
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Cephalaspis powriei
E.R. Lankester, 1870 † (FOSSIL)
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Cephalaspis salweyi
Egerton, 1857 † (FOSSIL)
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Cephalaspis westolli
H.D. Russell, 1954 † (FOSSIL)
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Genus: Cylindrites Gesner , 1758 † (DB: 7 SP)
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Cylindrites angulatus
P. Morris & J. Lycett, 1851 † (FOSSIL)
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Cylindrites blakei
Cox & Arkell 1950 † (FOSSIL)
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Cylindrites brevispira
W.H. Hudleston, 1896 † (FOSSIL)
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Cylindrites cylindricus
Morris & Lycett † (FOSSIL)
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Cylindrites deserti
J.H.F. Douvillé, 1916 † (FOSSIL)
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Cylindrites pyriformis
Morris & Lycett † (FOSSIL)
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Cylindrites striatus
Lissajous, 1923 † (FOSSIL)
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Genus: Didymaspis Lankester , 1867 † (DB: 1 SP)
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Didymaspis grindrodi
E.R. Lankester, 1867 † (FOSSIL)
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Genus: Eukeraspis Lankester , 1870 † (DB: 1 SP)
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Eukeraspis pustulifera
(A.E.R. Agassiz, 1839 †) (FOSSIL)
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Genus: Trochactaeonina Meek , 1863 † (DB: 1 SP)
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Trochactaeonina richardsoni
R.B. Newton, 1895 † (FOSSIL)
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