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Pentremites rusticus, calyx Bob Campbell Geology Museum Formation: Bentwood Limestone.
Pentremites godoni, 29 calyxes Bob Campbell Geology Museum Formation: Monteagle Limestone.
Pentremites godoni, 11 calyxes Bob Campbell Geology Museum Formation: Monteagle Limestone.
Pentremites godoni, ten calyxes Bob Campbell Geology Museum Formation: Monteagle Limestone.
Pentremites sp., crushed calyx Bob Campbell Geology Museum Formation: Fort Payne Formation.
Pentremites sp., crushed, incomplete specimen in matrix Bob Campbell Geology Museum Formation: Monteagle Limestone.
Blastoid (Pentremites godoni) Bob Campbell Geology Museum 325 million years old; Formation: Paint Creek Formation.