Dinosaur eggshell fragment
From collection Fossil collection by Lukas Wallentin
Dinosaur eggshell fragment
This specimen is a fossilized fragment of a dinosaur eggshell, exhibiting characteristics typical of the oofamily Megaloolithidae, which is commonly attributed to Titanosaurid sauropods. The fragment displays a rich, earthy brown coloration throughout. The exterior surface, visible in the first image, is covered in a dense, uniform pattern of small, rounded nodules or tubercles. This 'tuberculated' texture is a diagnostic feature used in ootaxonomy to identify specific types of dinosaur eggs. The second image provides a clear view of the shell's cross-section and interior surface. The shell is notably thick, measuring several millimeters, which is consistent with the large eggs laid by long-necked dinosaurs. In the cross-section, a vertical, columnar or prismatic structure is visible, representing the calcified units that formed the shell. These columns are separated by microscopic pores that allowed the developing embryo to breathe. The edges of the fragment are irregular and sharp, indicating it was broken from a larger egg before or during fossilization. The specimen has been thoroughly cleaned of its original sediment (matrix), allowing for an unobstructed study of its morphological features.
Megaloolithidae
Saurischia
Cretaceous
Fragment
Cleaned of matrix
Microstructural analysis of eggshells provides insights into dinosaur nesting habits and taxonomic classification.
Upper Cretaceous
Top view showing the characteristic nodular or tuberculated texture of the outer eggshell.
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection