Search results for: 'que es la vialidad en un analysis de spike'

A Top Quality Pachychephalosaurus wyomingensis maxillary tooth from the late Cretaceous of northern North America. Pachychephalosaurus is the dinosaur which is famous for its large domed head surrounded by spikes. The enamel is excellent quality with excellent color / patina. Typical wear faucet from grinding on opposing teeth. Note - strong high center ridge and some assymetry (see Pachy maxillary teeth differentiation discussion below). No cracks or restoration. An ultra rare Pachy maxillary tooth! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An excellent collector's quality Pachychephalosaurus tooth. Note - tooth comes with the gem case pictured. Authenticity guaranteed.

DP07       SIZE: 9/16"    

Note - Adding 13 new Pachy fossils in July 2018.       Link to Pachy fossils catalog

A GEM  Pachychephalosaurus wyomingensis pes ungual (foot claw) from the late Cretaceous of northern North America. Pachychephalosaurus is the dinosaur which is famous for its large domed head surrounded by spikes. This ungual has excellent color and patina. Complete specimen. An exceptional pes ungual. Note - this ungual has a strong Pachy twist (see Pachy ungual differentiation discussion below). No repair or restoration. An ultra rare Pachy pes ungual! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An exceptional collector's quality Pachychephalosaurus claw. Museum quality. Note - claw comes with a Riker type frame. Authenticity guaranteed. You do not see these top quality claws any more...

DP23       SIZE: 1-5/8"   

Note - Adding 4 new Pachy unguals in July 2018.       Link to Pachy fossils catalog

A Top Quality Pachychephalosaurus wyomingensis pes ungual (foot claw) from the late Cretaceous of northern North America. Pachychephalosaurus is the dinosaur which is famous for its large domed head surrounded by spikes. This ungual has excellent color and patina. Complete specimen with a very small amount of tip wear. An exceptional pes ungual. Note - this ungual has a strong Pachy twist (see Pachy ungual differentiation discussion below). No repair or restoration. An ultra rare Pachy pes ungual! Legally collected on private land in the Hell Creek Fm., Powder River Co., Montana. An exceptional collector's quality Pachychephalosaurus claw. Museum quality. Note - this claw comes with a Riker type frame. Authenticity guaranteed.

DP24       SIZE: 1-7/16"   

Note - Adding 4 new Pachy unguals in July 2018.       Link to Pachy fossils catalog

A LARGE, Diademaproetus praecursor (Proetid) trilobite from Morocco. Preparation is German directed with all original colors and no restoration. Scarce species. Exceptional, very fine (small leanses) compound eyes. An Upper Emsian Fm. specimen, Lower Devonian (395 mya) trilobite from the Assa Area, Dra Valley, Morocco. A Top Quality specimen. Exquisite preparation. Authenticity guaranteed.

XM73        Size: 1-11/16"  (1-1/4" wide)

Adding 31 quality Moroccan trilobites in April 2025.     Link to Moroccan trilobites.

Holmsella sp.; an  Extinct Primitive shark

A very rare shark skin specimen. This matrix piece is covered with dermal denticals. Shark skin impressions with denticals are extremely rare and a Paleozoic age find adds to the rarity. An exceptional collector's piece from an old collection!

Age: Pennsylvanian (295 mya) ; Dennis Fm.

Location: Hansen Quarry, La Platte, Nebraska

Z143         SIZE: 5-1/2"  x  4"

Holmsella sp.; an  Extinct Primitive shark

A very rare shark skin specimen. This matrix piece is covered with dermal denticals. Shark skin impressions with denticals are extremely rare and a Paleozoic age find adds to the rarity.  An exceptional collector's piece from an old collection!

Age: Pennsylvanian (295 mya) ; Dennis Fm.

Location: Hansen Quarry, La Platte, Nebraska

Z144            SIZE: 4" x 2-1/2"

A pair of top quality, ray dermal scutes (spiked type).  These spiked ray dermal scutes are scarce!    F935 is a double specimen.

F936 (Right)                 SIZE: 7/8"

A pair of top quality, ray dermal scutes (spiked type).  These spiked ray dermal scutes are scarce!    F935 is a double specimen.

F935 (Left)             SIZE: 1-1/16''

A rare, ~3" GEM Great White transition shark tooth, Carcharodon hubbelli, from Chile. The C. hubbelli is an evolutionary transition from the non-serrated big-tooth Mako shark to the fully serrated Great White shark which takes place in the late Miocene period. A FANTASTIC, EXTRA LARGE GW Transition tooth. The BEST of the BEST!

C201T           Size: 2-15/16"

An extra large, expert prepared Hollardops mesocristata trilobite. The preparation is German or German directed with all original colors and no restoration. Excellent preservation and condition. Incredible detail in the compound eyes. A Middle Devonian (380 mya) from the Djebel Issoumour area, Atlas Mts., Morocco. An extra large, top quality specimen. Authenticity guaranteed. Museum quality.

XM34      Size: 2-5/8"  (1-5/8" W)

Note - More than 20 high quality Devonian age Moroccan trilobite species for sale. Authenticity guaranteed.  -->  Link to Moroccan Trilobites

An Top Quality Kayserops sp. trilobite. Preparation is German directed with all original colors and no restoration. Excellent preservation and condition. Beautifil black shell. Excellent detail in the compound eyes. This specimen is fully exposed on a pedestal of original matrix. A Middle Devonian (380 mya) from the Djebel Issoumour area, Atlas Mts., Morocco. Authenticity guaranteed. An incredible amount of preparation was required for this fantastic display piece.

XM38          Size: 2-1/4"   (1-3/8 wide)

Adding 31 quality Moroccan trilobites in April 2025.     Link to Moroccan trilobites.

 A GEM Otodus with a spike like crown.  Perfect tooth.

M021P            SIZE: 1-3/16"