Leçons d’anatomie comparée

Georges Cuvier's Leçons d'anatomie comparée (Lessons on Comparative Anatomy), published in 1800-1805, was a foundational work in comparative anatomy and paleontology. In this work, Cuvier introduced his principle of the "correlation of parts," which posits that an animal's anatomical structures are interconnected and adapted to its environment and habits. This principle allowed him to reconstruct complete fossil skeletons and demonstrate that species had become extinct. Cuvier's work established a firm empirical basis for paleontology and challenged the idea of a single linear arrangement of the animal kingdom, instead proposing four distinct groups based on body plans. He rejected the concept of evolution, believing species were too perfectly coordinated to change.123