Stingrays are a group of sea rays, which are cartilaginous fish related to sharks. Many species are endangered. Stingrays are common in coastal tropical and subtropical marine waters throughout the world.
The mouth of the stingray is located on the ventral side of the vertebrate. Stingrays exhibit hyostylic jaw suspension, which means that the mandibular arch is only suspended by an articulation with the hyomandibula. This type of suspensions allows for the upper jaw to have high mobility and protrude outward.
The teeth are modified placoid scales that are regularly shed and replaced. In general, the teeth have a root implanted within the connective tissue and a visible portion of the tooth, is large and flat, allowing them to crush the bodies of hard shelled prey. Male stingrays display sexual dimorphism by developing cusp, or pointed ends, to some of their teeth. During mating season, some stingray species fully change their tooth morphology which then returns to baseline during non-mating seasons.
-The teeth shown in the images are an average representation of what you could receive.
-One gem jar with a few fossilized stingray teeth
This table contains the geological time periods of the past 2.5 billion years on Earth to aid in understanding age immense age of these fossils.(Ma = Mega-annum = 1,000,000 years)
|EON||ERA||PERIOD||EXTENT (Ma)||DURATION (Ma)|
Super awesome fossil! Cannot wait to buy more for my nephews. Gave it to one of my nephews as a gift and he loved it! Speedy delivery too. Thanks!