1.04" Mosasaur (Halisaurus Arambourgi) Tooth

Here's
Artists reconstruction of a Halisaurus.  By Nobu Tamura
Artists reconstruction of a Halisaurus. By Nobu Tamura
a beautifully preserved and quite large tooth of one of the most fearsome predators to ever roam earth's oceans, the Mosasaur. This tooth has been completely removed from the rock. These teeth are found in the Oulad Abdoun Basin of Morocco during phosphate mining operations and are Upper Cretaceous in age.

There are several different types of Mosasaurs preserved in these rocks, and this tooth appears to be from Halisaurus arambourgi. Isolated Mosasaur teeth can be difficult to accurately assign to a genus/species because of the degree of variation in tooth shape between different tooth positions in the mouth. Halisaurus teeth tend to be smaller and have a distinctive backwards curve or hook to them.

Halisaurus ("Ocean Lizard") was in the Mosasaur family and were small compared to other Mosasaurs reaching lengths of 3-4 meters. There are one of the more uncommon types of Mosasaurs present in the phosphate beds, with less that 5% of the teeth representing Halisaurus.
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DETAILS
SPECIES
Halisaurus arambourgi (Mosasaur)
LOCATION
Oulad Abdoun Basin, Morocco
FORMATION
Phosphate Deposits
SIZE
1.04" long
ITEM
#21473
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