The Type Fox Hills Formation, Cretaceous (Maestrichtian), South Dakota: Systematics of the Bivalvia

Explore the Fox Hills Formation through detailed bivalve studies and revised classifications. This Peabody Museum bulletin presents an emended diagnosis of key species and a careful discussion of their shell features, teeth, and resilience patterns, with plates and figures illustrating variability and anatomy. This edition compiles descriptions, comparisons, and interpretation of fossil bivalves from the Campanian to Maestrichtian, focusing on how small changes in hinge and dentition affect classification. It combines taxonomic analysis with illustrations to help readers understand bivalve morphology and how scientists determine relationships among similar forms. In-depth examination of Clisocolus moreauensis and related taxa, including hinge and resilifer details.Discussion of ontogenetic changes in morphology and how these affect identification.Critical look at historical classifications and how new observations refine them.Numerous plates and figures showing shells, lamellae, and muscle insertion areas across multiple species. Ideal for readers of paleontology and fossil mollusks who want a clear, image-supported view of taxonomy and stratigraphy in the Fox Hills region. Read more