Spinosaurus Tooth
Spinosaurus aegyptiacus • Body fossil (isolated tooth), vertebrate theropod dinosaur
Geological Period
Cretaceous (Cenomanian stage)
Estimated Age
93 to 100 million years
Preservation Type
Permineralization with high-quality enamel preservation; consistent with the phosphate-rich environments of the Kem Kem beds.
Condition Assessment
Good to Very Good. The crown and enamel are largely intact with clear striations. There is a clean transverse fracture (repaired) which is extremely common in Moroccan fossils.
Taxonomic Classification
Chordata, Reptilia, Dinosauria, Theropoda, Spinosauridae, Spinosaurus
Morphological Description
Conical shape, slightly curved with longitudinal fluting (striations) running the length of the crown. It lacks the serrations typical of most theropods, characteristic of a piscivorous diet. Sub-circular cross-section with enamel displaying fine vertical ridges.
Rock Matrix
Fine-grained reddish-brown sandstone and siltstone (visible remnants at the base of the crown).
Formation & Location
Kem Kem Group (Tegana Formation), Morocco, North Africa.
Size & Dimensions
Approximately 2 to 2.5 inches (5-6 cm). This is considered a medium-sized adult or sub-adult tooth for this taxon.
Value & Rarity
Estimated Market Value
$60 - $120 USD
Auction Estimate
$80 - $150 USD
Rarity Assessment
Common. Spinosaurus teeth are among the most frequently found and distributed dinosaur fossils globally due to the expansive nature of the Kem Kem beds.
Scientific Significance
Provides evidence of the semi-aquatic dietary specialized nature of Spinosaurids, indicating an ecosystem dominated by massive freshwater and estuarine predators.
Preparation Recommendations
Keep in a low-humidity environment to prevent pyrite disease or matrix crumbling. Minimal preparation needed other than stabilization of the base with Paraloid B-72 if fragile.
Notable Features
Distinctive longitudinal fluting and a well-preserved 'gum line' interface where the tooth met the alveolus.