Promicroceras Planicosta (Reynès, 1879) – Calcite Ammonite Fossil Bay of Bengal moonstone helping you access spiritual insights

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Phacops trilobites lived in warm shallow seas that covered much of the ancient world during the Devonian Period

Promicroceras Planicosta (Reynès, 1879) – Calcite Ammonite Fossil Bay of Bengal moonstone helping you access spiritual insightsA beautifully preserved specimen of Promicroceras planicosta, fully replaced by calcite. This ammonite displays fine ribbing and its characteristic planispiral coiling. As a key index fossil of the Lower Jurassic Sinemurian, Promicroceras is highly significant for ammonite biostratigraphy in the UK. An excellent choice for collectors, researchers, or curated display. Stratigraphic Context Lower Lias Group, Obtusum Zone Chronostratigraphy Lower