RARE Hexanchus gigas Upper Shark Tooth Fossil – Early Pliocene – Huarra Formation – Antofagasta, Chile

Description

RARE Hexanchus gigas Upper Shark Tooth – Early Pliocene – Huarra Formation – Antofagasta Region, Chile

This listing features a rare and well-preserved fossil tooth from the extinct cow shark species Hexanchus gigas, a member of the Hexanchidae family known for their six-gilled anatomy. This upper jaw tooth was discovered in the Huarra Formation near Antofagasta, Chile, and dates to the Early Pliocene epoch.

Fossil Type: Upper Shark Tooth

Species: Hexanchus gigas

Order: Hexanchiformes

Family: Hexanchidae

Class: Chondrichthyes (cartilaginous fishes)

Geological Stage: Early Pliocene (~5.3–3.6 million years ago)

Formation: Huarra Formation

Location: Antofagasta Region, Northern Chile

Depositional Environment: Shallow to mid-depth marine shelf; nutrient-rich, silty marine conditions conducive to vertebrate fossil preservation

Morphology Features: Hexanchus teeth are distinctive for their multi-cusped form, with the upper teeth showing a more symmetrical triangular main cusp, unlike the lower teeth which bear multiple lateral cusplets. This upper tooth displays clear enamel preservation with a broad base, a hallmark of deep-bodied sixgill sharks, suggesting its placement in the upper jaw. The robust nature and size reflect its adaptation for seizing and slicing through prey.

Notable: Fossils of Hexanchus gigas are much rarer compared to other fossil shark species, especially those found in South America. This specimen contributes to the understanding of deep-sea predator evolution and Pliocene marine ecosystems in the Southern Hemisphere.

Condition: Excellent preservation with detailed serration and root structure visible. This is the actual specimen you will receive. Please refer to the photo for scale – Scale Rule Squares / Cube = 1cm.

Important Note:

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

This is a top-tier fossil for collectors of prehistoric marine life, shark teeth, and South American vertebrate fossils. A scientifically and visually striking addition to any fossil collection.