Abstract

Lower Devonian tentaculitids (Mollusca, Cricoconarida) from the Salmontrout Limestone and McCann Hill Chert are described and illustrated. They include one new genus, Semicyclus, and 5 new species: Dicricoconus dutroi, D. triannulatus, Uniconus orbiculus, Semicyclus brabbi, Nowakia parabarrandei. The succession of tentaculitid and graptolite faunas in Alaska is similar to the established zonation in Europe and indicates a precise and reliable long-range correlation (Siegenian to Emsian).

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