Spinosaurid Dinosaur Tooth
Spinosaurus cf. aegyptiacus • Vertebrate body fossil (shed tooth)
Geological Period
Cretaceous
Estimated Age
100 to 95 million years ago (Late Cretaceous, Cenomanian)
Preservation Type
Permineralization and replacement with dense mineralized dentine and enameloid, typical of fossil teeth from fluvial deposits.
Condition Assessment
Fair to Good condition. The crown is mostly intact with clear enamel and striations, but exhibits tip wear, surface micro-fracturing, and a localized patch of missing or repaired enamel on the mid-section.
Taxonomic Classification
Phylum Chordata, Class Reptilia, Superorder Dinosauria, Order Saurischia, Suborder Theropoda, Family Spinosauridae, Genus Spinosaurus
Morphological Description
Conical, robust crown lacking prominent serrations (carinae), which is characteristic of spinosaurids. Displays subtle vertical longitudinal fluting or striations near the base of the enamel, a smooth central enamel surface, and a slightly curved, circular to sub-oval cross-section tapering to a blunt apex.
Rock Matrix
Reddish-brown sandstone and iron-rich matrix remnants adhering to the surface, indicating deposition in a fluvial or deltaic environment.
Formation & Location
Kem Kem Group / Tegama Group, southeastern Morocco or comparable North African Cretaceous deposits
Size & Dimensions
Approximately 2.5 cm to 3 cm in length, consistent with a mid-size tooth from a juvenile to sub-adult individual or a lateral tooth position.
Value & Rarity
Estimated Market Value
30 USD to 80 USD
Auction Estimate
25 USD to 60 USD
Rarity Assessment
Common, as isolated Spinosaurus teeth are frequently recovered from the Kem Kem beds of Morocco, though well-preserved complete teeth with distinct fluting are highly sought after by entry-level collectors.
Scientific Significance
Provides insights into the diet and tooth morphology of large semi-aquatic predatory dinosaurs (spinosaurids), supporting theories of piscivory and generalist carnivorous behavior in Cretaceous North African river systems.
Preparation Recommendations
Gentle mechanical cleaning using soft brushes or an air-abrasive unit at low pressure to remove residual matrix. Stabilization with a dilute polyvinyl butyral (PVB) or Paraloid B-72 consolidant if micro-fractures threaten further flaking. Store in a stable, low-humidity environment.
Notable Features
Distinct basal longitudinal striations (fluting) combined with a lack of serrated edges, confirming spinosaurid identity rather than typical carcharodontosaurid theropod teeth found in the same geological beds.