Thescelosaurus

Thescelosaurus

Thescelosaurus or "marvelous lizard" was a mid-size dinosaur from the late Cretaceous that roamed the northwest US. They were bipedal and reached a length of 13 feet. Fossil remains include well preserved teeth, bones, and claws, and are highly valued by collectors. These top quality specimens were all legally collected from private lands in the northwestern US. Late Cretaceous, Hell Creek Fm. (or equivalent), 67-66 MYA.

Thescelosaurus fossils are less abundant than the large theropods and herbiovores in the Hell Creek Fm. A dinosaur census conducted by the Hell Creek Project calculated relative abundance of the Thescelosaurus was 8% of the population. Today, we find fossilized teeth, unguals (claws), spikes, and non-associated bones.

Thescelosaurus tooth identification. Thescelosaurus teeth are routinely identified and sold as Pachycephalosaurus teeth since they maxillary teeth have similar shape and size. There has been some good work done presented in the Fossil Forum. The Fossil Forum author concludes that Pachycephalosaurus maxillary teeth can be differentiated from Thescelosaurus teeth since the Pachy teeth exhibit “vertical ridges are more pounced, fewer and a more prominent center ridge may exist. There is also no symmetry with the crowns.” Several good photographic references are provided. Link to the Fossil Forum discussion. A dominant center ridge appears to be consistent and lack of symmetry on the crown appeared in most of the Pachycepholsaur reference teeth.  That said, rooted teeth from both species are scarce and are highly collectable.

Thescelosaurus ungual (claw) identification. Thescelosaurus unguals (claws) are routinely identified and sold as Pachycephalosaurus unguals as they have a similar shape and size. Unfortunately there is little reference data for Pachycephalosaurus unguals with only one Pachy specimen with partial legs found. Per my discussion with the primary Fossil Forum Hell Creek dinosaurs author, he suggested “to differentiate between the two is Thescelosaurus claws are flat and triangular and the ones with a twist are Pachy”. That said, unguals  (claws) from both species are rare and are highly collectable.

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  1. Thescelosaurus
    $695.00

    A Top Quality Thescelosaurus neglectus pes ungual (foot claw) from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. This claw is excellent quality with excellent color / patina. Note - Thesc unguals are described as flat triangles.(see Thesc-Pachy claw differentiation discussion below). Most likely one stress crack - stabilized cracks and no restoration. A rare Thescelosaurus pes ungual! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Excellent collector's quality Thescelosaurus claw. Note - claw comes with a Riker type frame. Authenticity guaranteed.

    DI21        SIZE: 2-1/2"    (1-1/4" W)

    Note - Adding 4 new Thescelosarus claws in July 2018.       Link to Thesc fossils catalog

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  2. Thescelosaurus
    $575.00

    A Top Quality Thescelosaurus neglectus pes ungual (foot claw) from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. This claw is excellent quality with excellent color / patina. A little erosion at the tip, but otherwise a perfect claw. Note - Thesc unguals are described as flat triangles.(see Thesc-Pachy claw differentiation discussion below). No repair and no restoration. A rare Thescelosaurus pes ungual! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Excellent collector's quality Thescelosaurus claw. Note - claw comes with a Riker type frame. Authenticity guaranteed.

    DI22         SIZE: 1-15/16"  

    Note - Adding 4 new Thescelosarus claws in July 2018.       Link to Thesc fossils catalog

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  3. Thescelosaurus
    $550.00

    A Top Quality Thescelosaurus neglectus pes ungual (foot claw) from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. This claw is excellent quality with excellent color / patina. A little erosion at the tip, but otherwise a perfect claw. Note - Thesc unguals are described as flat triangles.(see Thesc-Pachy claw differentiation discussion below). No repair and no restoration. A rare Thescelosaurus pes ungual! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Excellent collector's quality Thescelosaurus claw. Note - claw comes with a Riker type frame. Authenticity guaranteed.

    DI23        SIZE: 1-7/8"  

    Note - Adding 4 new Thescelosarus claws in July 2018.       Link to Thesc fossils catalog

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  4. Thescelosaurus
    $350.00

    A Top Quality Thescelosaurus neglectus maxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Typical wear faucet from grinding on opposing teeth. Note - no strong center ridge but crown has asymmetry (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare rooted Thesc or Pachy maxillary tooth! Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. An excellent collector's quality Thescelosaurus tooth. Thesc maxillary tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI02       SIZE: 13/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  5. Thescelosaurus
    $325.00

    A Top Quality Thescelosaurus neglectus maxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. No wear faucet from grinding on opposing teeth. Note - no strong center ridge and good crown symmetry (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare rooted Thesc maxillaryAuthenticity guaranteed. An excellent collector's quality Thescelosaurus tooth. My best rooted Thesc maxillary tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI01       SIZE: 11/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  6. Thescelosaurus
    $300.00

    A High Quality Thescelosaurus neglectus pes ungual (foot claw) from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. This claw is excellent quality with excellent color / patina. One crack is stabilized and the very end of the "wings" (the flat ledge below the blood groove) were filled for aesthetics - about a 1/16". Note - Thesc unguals are described as flat triangles.(see Thesc-Pachy claw differentiation discussion below). No restoration. A rare Thescelosaurus pes ungual! Legally collected on private land in the Hell Creek Fm., Carter Co., Montana. Excellent collector's quality Thescelosaurus claw. Note - claw comes with a Riker type frame. Authenticity guaranteed.

    DI24        SIZE: 1-11/16"  

    Note - Adding 4 new Thescelosarus claws in July 2018.       Link to Thesc fossils catalog

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  7. Thescelosaurus
    $275.00

    A Top Quality Thescelosaurus neglectus maxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Typical wear faucet from grinding on opposing teeth. Note - no strong center ridge and good crown asymmetry (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare rooted Thesc maxillary tooth! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Thesc maxillary tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI04       SIZE: 3/4"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  8. Thescelosaurus
    $275.00

    A Top Quality Thescelosaurus neglectus maxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Typical wear faucet from grinding on opposing teeth. Note - no strong center ridge and good crown asymmetry (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare rooted Thesc maxillary tooth! Legally collected on private land in the Hell Creek Fm., Garfield Co., Montana.An excellent collector's quality Thescelosaurus tooth. Thesc maxillary tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI03       SIZE: 5/8"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  9. Thescelosaurus
    $250.00

    A Top Quality Thescelosaurus neglectus premaxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Minor wear faucet from grinding on opposing teeth. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare rooted Thesc premaxillary tooth! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI07       SIZE: 11/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  10. Thescelosaurus
    $250.00

    A Top Quality Thescelosaurus neglectus maxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Typical wear faucet from grinding on opposing teeth. Note - no strong center ridge and good crown asymmetry (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare rooted Thesc maxillary tooth! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI05       SIZE: 3/4"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  11. Thescelosaurus
    $125.00

    A GEM Thescelosaurus neglectus maxillary tooth crown from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. No wear faucet from grinding on opposing teeth. Note - no strong center ridge and good crown asymmetry (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare Thesc maxillary tooth! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI06       SIZE: 3/8"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  12. Thescelosaurus
    $100.00

    A Top Quality Thescelosaurus neglectus premaxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Minor wear faucet from grinding on opposing teeth. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare partially rooted Thesc premaxillary tooth! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI08       SIZE: 9/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  13. Thescelosaurus
    $75.00

    Two Top Quality Thescelosaurus neglectus premaxillary teeth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. Two nice Thesc premaxillary teeth crowns! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Excellent collector's quality Thescelosaurus teeth. Note - teeth come with the gem case pictured. Authenticity guaranteed.

    DI13       SIZE: 5/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  14. Thescelosaurus
    $75.00

    Two Top Quality Thescelosaurus neglectus premaxillary teeth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. Two nice Thesc premaxillary teeth crowns! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Excellent collector's quality Thescelosaurus teeth. Note - teeth come with the gem case pictured. Authenticity guaranteed.

    DI12       SIZE: 5/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  15. Thescelosaurus
    $75.00

    Two Top Quality Thescelosaurus neglectus premaxillary teeth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. Two nice Thesc premaxillary teeth crowns! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. Excellent collector's quality Thescelosaurus teeth. Note - teeth come with the gem case pictured. Authenticity guaranteed.

    DI11       SIZE: 5/16"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  16. Thescelosaurus
    $75.00

    A Top Quality Thescelosaurus neglectus premaxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. No wear faucet from grinding on opposing teeth. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare Thesc premaxillary tooth crown! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI10       SIZE: 3/8"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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  17. Thescelosaurus
    $75.00

    A Top QualityThescelosaurus neglectus premaxillary tooth from the late Cretaceous of northern North AmericaThescelosaurus is a mid-sized dinosaur found in the Hell Creek formation. The enamel is excellent quality with excellent color / patina. No wear faucet from grinding on opposing teeth. Note - Thesc premaxillary teeth crown shape is quite distinct (see Thesc-Pachy maxillary teeth differentiation discussion below). No cracks or restoration. A rare Thesc premaxillary tooth crown! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Thescelosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

    DI09       SIZE: 3/8"    

    Note - Adding 17 new Thescelosarus fossils in July 2018.       Link to Thesc fossils catalog

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