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Allosaurus
U.S. private land + docsApex Morrison Formation predator. Private-quarry and ranch material supplies the legitimate commercial market; federal Morrison exposures are not dig-to-sell sites.
Sample photoPeriod
Late Jurassic
Age
155–145 mya
Formation
Morrison
Diet
Carnivore
Common fossils
Teeth, bones, skulls
Price context
Compare isolated teeth, bones, skull material, and mounts within their own specimen class
Price bands are educational market context for common grades — not an appraisal, quote, or investment forecast.
Collecting status
U.S. private land + docs. Always confirm landowner release or export path, chain of custody, and that the specimen was not collected from forbidden public land. U.S. federal vertebrates under PRPA are not commercial inventory.
Open related fossil-law guide →Trade notes
Serrated blade teeth. Confirm Morrison private-land path — Colorado, Utah, Wyoming ranches differ from monument / BLM stories.
How to evaluate this taxon
For teeth, compare serration preservation, root condition, feeding wear, repair, and measurement method. For skull or mounted material, require an element-by-element inventory and reconstruction map. Morrison Formation alone does not establish ownership; the seller should connect the specimen to a documented private parcel and chain of custody.
Fake-watch for this taxon
- — Cast teeth
- — Composite dentaries
- — Mislabelled allosauroid teeth
Documents to demand
- — Landowner release
- — Formation + county
- — Restoration %
Research sources and limits
Taxonomy and age context are checked against museum or government references. Buyer guidance is Jurassic Depot editorial analysis, not a specimen identification, authentication, appraisal, or legal opinion. A taxon page cannot establish the identity or lawful title of an item offered for sale.
- Natural History Museum — Allosaurus directory entry
- National Park Service — fossil protection
- Paleontological Resources Preservation Act (official PDF)
Editorial review: August 1, 2026. Scientific classifications and laws can change; use the linked source and transaction-specific professional advice.
On Jurassic Depot
Fossil laws by countryU.S. fossil lawsProvenance guideFossil laws briefingHow to buy fossils legally
Outside sources (educational)
Primary society and government pages — not Jurassic Depot. Open these when you need statute or agency language, not a marketplace summary.