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Otodus aksuaticus (Partial serrated)

SKU
K547
Out of stock
$450.00
Overview

A very rare, early Otodus aksuaticus upper jaw, lateral tooth from Kzil-Orda, Kazakhstan. A transitional tooth leading to O. auriculatus (see detailed discussion below) which leads to Megalodon. A July Fossil of the Month. The bourlette is complete. This tooth exhibits small serrations along the lower 1/3 of the crown and micro serrations to the tip. These teeth exhibit excellent color, gloss, and preservation. A rare, early (Ypresian) Eocene Auriculatus transition tooth.  A very challenging tooth to find when building a Megalodon evolutionary set! No repair or restoration. Authenticity guaranteed. This western Kazakhstan site is one of the few places in the world where the Otodus obliquus to Otodus auriculatus transition can be found in adjacent geologic layers. 

K547         SIZE: 1-15/16"

Note - Adding 24 Kazakh Auriuclatus or transition teeth in July 2024. -->  Link to Kazakh Auriculatus teeth.

 

 

 

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This catalog contains excellent teeth from an extinct Otodontid shark - Otodus auriculatus, a precursor to the Megalodon. The early Otodus auriculatus tooth is fully serrated (to 1/8" of the tip) with very large serrations and highly irregular cusps serrations.

Aktulagay site - The Tolagaysor Fm. at this site contains O. obliquus (non-serrated) teeth at the lowest levels ( Level 0-2), O. auriculatus teeth at the upper levels (Level 6), and semi-serrated transition teeth found in between (Levels 3-5).It is the only place on earth that contains this evolutionary story in one hill side.I will attach the paper.

The Evolutionary Path to Megalodon - transition from the non-serrate Otodus obliquus to the fully serrated Auricuation tooth - The Kazakhstan early Eocene sediments are one of the few places in the world where the transition to the fully serrated Auriculatus tooth can be observed and collected.  The  transition teeth representing the progression from Otodus obliquus to the Auriculatus are as follows.

Otodus mugodzharicus  - has very fine serrations covering lower 2/3s of the crown (sometimes the serrations can be the wavy "Escheri-like" serrations) and little to no side cusp serrations. 

Otodus aksuaticus - a semi-serrated or finely serrated tooth that can have moderate sized serrations at the base of the crown. The side cusps will have few serrations.

Other Kazakhstan site - These teeth are very rare, early Eocene (Ypresian) in age (approx. 55 mya) from Kzil-Orda region in western Kazakhstan (new location). Note - this location has been collected for ~3 summers and it was exhausted in 2008. This is the last of the material from this site that made it to US. Some incredibly rare teeth are posted.