Screen 17: Muricoidea
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| Ecphora meganae williamsi (42 mm), colno 35269 Choptank Formation |
Ecphora patuxentia (57 mm), colno 48125 Choptank Formation, Drum Cliff Member |
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| Ecphora quadricostata (74 mm), colno 17319 Choptank Formation |
Ecphora quadricostata (44 mm), colno 40212 Choptank Formation |
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