📚 Encyclopedia Update — October 2, 2026

Encyclopedia

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Recent studies have refined the biostratigraphy of Subprionocyclus neptuni as a crucial index fossil for the middle Turonian, with research focusing on its evolutionary turnover in the Western Interior Seaway. New specimen analysis highlights the rapid diversification of this ge…

Ammonites hub

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Recent stratigraphic studies have refined the use of Prionocyclus wyomingensis as a crucial index fossil for defining the Turonian stage of the Late Cretaceous. Research has focused on its migration patterns within the Western Interior Seaway, revealing a correlation between its…

Ammonites hub

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Recent research on Didymoceras stevensoni has focused on its stratigraphic distribution within the Pierre Shale, providing better resolution on its role as an index fossil for the late Campanian. Recent studies suggest a complex heteromorphic growth pattern driven by buoyancy co…

Encyclopedia

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Recent research focuses on the heteromorph ammonite family Ancyloceratidae, confirming that Emericiceras species occupied specific bathymetric niches in the Barremian stage of the Early Cretaceous. Studies emphasize their complex helical coiling patterns, which likely served as …

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Recent studies in the Permian strata of the Himalayas and the Southern Urals have refined the biostratigraphy of Paraceltites elegans, confirming its status as a key indicator fossil for late Guadalupian marine environments. Taxonomic analysis continues to solidify its placement…