Soon after his appointment as répétiteur at the École Polytechnique he began a lifelong friendship with Joseph Louis Gay-Lussac, and the two carried out many research projects together.
The smaller size of the infested crinoids is interpreted as a consequence of nutrient‐stealing by the parasitic gastropods, a strategy that finds analogs in modern seas.
In June, 2008, the partial internal mold of a small ammonite was discovered beneath a Tylosaurus nepaeolicus skull collected from the Clioscaphites vermiformis-C. choteauensis zone (early to mid-Santonian), Smoky Hill Chalk.
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