New Mexico's Cretaceous Ammonites
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New Mexico's Cretaceous Ammonites
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Prionocyclus novimexicanus
Prionocyclus novimexicanus
Prionocyclus macombi
Scaphites whitfieldi
Acanthoceras amphibolum
Coilopoceras inflatum
Collignoniceras woollgari
Placenticeras pseudoplacenta
Prionocyclus hyatti
Clioscaphites vermiformis
Romaniceras mexicanum
Tragodesmoceras
carlilense
Spathites puercoensis
Prionocyclus macombi
Placenticeras syrtale
Acanthoceras amphibolum
Tarrantoceras sellardsi
Baculites scotti
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