Search results for: 'arare 15 sperm with replacement first'

An ultra rare, LARGE, Top Quality Edestus heinrichi partial tooth whorl, from Herrin, Illinois. A July Fossil of the Month. This is a Paleozoic shark that lived in swamps that our now underground coal deposits. An ultra rare triple crown whorl section with exceptional quality crowns. Excellent preservation, serrations, and serration detail. The Edestus shark would have an upper and lower tooth whorl that are vertically opposed. Research showed that they could use their opposing teeth in a scissor-like motion or a vertical whipping motion to cut prey. It is the first animal to cut vertically. A very strange looking and unique acting shark. Shark recreation image is credited to Julio Lacerdo. These rare teeth are Pennsylvanian age from Illinois. No repair or restoration. Authenticity guaranteed. 

I03        SIZE:  6-5/8" w/ root  (1-7/8" crown) 

Adding 22 Edestus shark teeth in July 2025.    Link to Edestus shark.

A Top Quality Seven-Gill Cow shark (Notorhynchus) - Lower Jaw Symphyseal (very rare position) fossil shark tooth from Calvert Cliffs, Maryland. A female shark. Razor and complete sharp cusps. Miocene age from the Calvert Formation. Gorgeous tooth for the rare tooth collector! Near perfect tooth. Authenticity guaranteed.

MD011             Size: 9/16" W

A Top Quality Seven-Gill Cow shark (Notorhynchus) - Lower Jaw Symphyseal (very rare position) fossil shark tooth from Calvert Cliffs, Maryland. A female shark. Razor and complete sharp cusps. Miocene age from the Calvert Formation. Gorgeous tooth for the rare tooth collector! Near complete tooth. Authenticity guaranteed.

MD012             Size: 9/16" W

A well preserved, rare Scyphocrinites elegans crinoid holdfast from Morocco. The crinoid stem attached to these floating holdfasts. The Scyphocrinites crinoids were floating crinoids and their holdfast was actually an air bladder that supported multiple stems and calyx. This holdfast is bulbous with a fantastic detail. A peg stand is included as in the photos. These crinoid holdfasts make excellent fantastic display pieces. Authenticity guaranteed. I never see these holdfasts available!  Note - An international shipping charge supplement is required for this product. Item weighs 4.5 lbs.

M2058      SIZE: 4-1/2" x 3-3/4" x 4"  

Name: Scyphocrinites elegans        Age: Upper Silurian (420 MMYA)        Location: Djebel Issoumour, Alnif, Morocco

Note - Posting a 9 piece crinoid collection in November 2023.       Link to Crinoids

A LARGE, GEM modern Mako shark tooth from the Shortfin Mako shark, Isurus oxyrhnychus. Bright white color. Perfect tooth. A large lateral tooth. Authenticity guaranteed.

MM10          SIZE: 1-1/16"

Note- adding 10 Mako shark teeth in January 2020.  -> Link to modern Mako shark teeth.

A LARGE, GEM modern Mako shark tooth from the Shortfin Mako shark, Isurus oxyrhnychus. Bright white color. Perfect tooth.. An extra large lateral tooth. Authenticity guaranteed.

MM09           SIZE: 1-1/8"

Note- adding 10 Mako shark teeth in January 2020.  -> Link to modern Mako shark teeth.

A LARGE, Top Quality modern Mako shark tooth from the Shortfin Mako shark, Isurus oxyrhnychus. Bright white color. Near perfect tooth. An extra large lateral tooth. Authenticity guaranteed.

MM08           SIZE: 1-1/16"

Note- adding 10 Mako shark teeth in January 2020.  -> Link to modern Mako shark teeth.

An EXTRA LARGE, Top Quality modern Mako shark tooth from the Shortfin Mako shark, Isurus oxyrhnychus. Bright white color. Near perfect tooth.. An extra large anterior tooth. Authenticity guaranteed.

MM02            SIZE: 1-7/16"

Note- adding 10 Mako shark teeth in January 2020.  -> Link to modern Mako shark teeth.

A LARGE, Top Quality modern Mako shark tooth from the Shortfin Mako shark, Isurus oxyrhnychus. Bright white color. Perfect tooth. An extra large lateral tooth. Authenticity guaranteed.

MM07           SIZE: 1-1/16"

Note- adding 4 Mako shark teeth in January 2022.  -> Link to modern Mako shark teeth.

A Rare, "Flying" Minicryphaeus giganteus trilobite. Another November Fossil of the Month. The specimen has been expertly prepared to make it completely free standing in a flying position. This is a BIG trilobite with a very unique design. Incredible shell and spine preservation and incredible size for this rare species! A well defined rostrum and excellent compound eyes. Note-  a rather new trilobite which was first described and named in 2014. An Early Devonian (410 mya) trilobite from the Jbel El Mrakib area, Atlas Mts., Morocco. Authenticity guaranteed. A very large and well preserved trilobite. Stands 4-1/2" tall - an incredible display! Much better than typical examples in the market. The BEST collector's quality! Museum Quality.

XM48        Size: 3-3/8"  x  1-3/4" W  ;  Specimen mount is 4-1/2" tall.

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

A very rare, Top Quality Edestus heinrichi shark tooth, from Herrin, Illinois. This is a Paleozoic shark that lived in swamps that our now underground coal deposits. An excellent matrix specimen that inludes the opposing tooth mold as well. Excellent preservation, serrations, and serration detail. The Edestus shark would have an upper and lower tooth whorl that are vertically opposed. Research showed that they could use their opposing teeth in a scissor-like motion or a vertical whipping motion to cut prey. It is the first animal to cut vertically. A very strange looking and unique acting shark. Shark recreation image is credited to Julio Lacerdo. These rare teeth are Pennsylvanian age from Illinois. No repair or restoration. Authenticity guaranteed. Note - shipping weight is 1.9 lbs. International "free shipping" will require supplemental postage.

I11        SIZE:  3" w/ root  (1-1/2" crown) ;  Matrix block is 3.5" x 3.5"

Adding 22 Edestus shark teeth in July 2025.    Link to Edestus shark.

A very rare, LARGE, Top Quality Edestus heinrichi shark tooth, from Herrin, Illinois. This is a Paleozoic shark that lived in swamps that our now underground coal deposits. Note - this tooth has a lot of pyrite and the tip is naturally rounded (polished)  which thought to be due to the vertical whipping motion used to slice prey.  Excellent preservation, serrations, and serration detail. The Edestus shark would have an upper and lower tooth whorl that are vertically opposed. Research showed that they could use their opposing teeth in a scissor-like motion or a vertical whipping motion to cut prey. It is the first animal to cut vertically. A very strange looking and unique acting shark. Shark recreation image is credited to Julio Lacerdo. These rare teeth are Pennsylvanian age from Illinois. No repair or restoration. Authenticity guaranteed. 

I09        SIZE:  4-1/8" w/ root  (1-7/8" crown) 

Adding 22 Edestus shark teeth in July 2025.    Link to Edestus shark.