Biodiversity Illustrationsbiodiversitypix@mastodon.art

Aug 21, 2026, 6:23 PM

🦖 Description des mollusques fossiles qui se trouvent dans les grès verts des environs de Genève /.
Genève: impr. de Jules-Guillaume Fick, 1847-1853..

[Source: https://biodiversitylibrary.org/page/31178532]

Illustration plate showing detailed scientific drawings of fossilized mollusk shells from the Cretaceous period, found near Geneva. The page features multiple spiral-shaped shells with varying textures and cross-sections, labeled as Pleurotomaria Saussureana, P. gurgitis, P. Allobrogensis, and P. coronata. Notable details include finely etched spiral ridges, smooth and rough shell surfaces, and segmented cutaway views revealing internal structures. The plate is numbered 23 and includes magnified sections highlighting shell patterns. This 19th-century lithograph serves as a precise paleontological reference for different fossil mollusk species from green sandstone deposits around Geneva.