|
This tooth specimen is a Nebrius obliquus nurse shark tooth. The Ginglymostomatidae family gets its name from the Greek language, meaning hinge mouth. They were small bottom dwelling, nocturnal sharks which fed primarily on crustaceans, molluscs, and other fish.
The teeth of Nebrius obliquus are characterized with the center point of the tooth being somewhat narrower and more pointed than the teeth of Ginglymostoma angolense. Less pronounced serrations fan out on both sides with the ribbing extending less than half way down to the root of the tooth. The size of the nurse shark teeth are measured by their width (which is usually the largest measurement of the tooth).
As with all shark teeth, species will vary with slight or minor variations in their teeth. In the teeth offered here the Genus is either Ginglymostoma or Nebrius. In any case they are fairly rare, making up only one in 2,000 to 4,000 (or more) compared to the quantity of other shark teeth that are found. The only living relative of the Nebrius Genus is Nebrius ferrugenius, the tawny nurse shark.
Kingdom: Animalia, Phylum: Chordata, Class: Chondrichthyes, Sub-class: Elasmobranchii, Order: Orectolobiformes, Family: Ginglymostomatidae, Genus: Nebrius, Species: obliquus.
Nebrius obliquus
|
|
|
Quantity in Basket:
None
Code: TMNO-103
Price: $25.00
Shipping Weight: 0.25 pounds
|
|
Time: Paleocene - Eocene - approximately 60-45 million years ago.
Location: Phosphate beds, Khourigba, Morocco.
Dimensions: 5/16"
Size is measured in width.
|
|