Reviews
This Specimen has been sold.
HERE ARE SOME OTHER SIMILAR FOSSILS FOR SALE
4.3" Plesiosaur Caudal Vertebra And Mosasaur Tooth - Morocco
This is a 4.3" wide Plesiosaur caudal vertebra from the Upper Cretaceous phosphate deposits in the Oulad Abdoun Basin of Morocco. It is in good condition on the sandstone in which it was found. The left transverse is largely intact with the base of the right transverse process also present. The spinal process is missing. In addition there is a Mosasaur tooth. The rock contains unidentified bone and shell material.
About Plesiosaurs
Plesiosaurs were a diverse group of marine reptiles that lived during the Jurassic and Cretaceous periods, thriving in Earth’s oceans for more than 135 million years. Although they lived alongside dinosaurs, plesiosaurs were not dinosaurs; instead, they were fully aquatic reptiles adapted for life in open water. Their most recognizable features included broad, streamlined bodies, four powerful flippers used for underwater “flight,” and a wide range of neck lengths. Fossils of plesiosaurs have been found on every continent, including Antarctica, showing that they inhabited oceans across the globe.
This group included two main body types that filled very different ecological roles. Long-necked plesiosaurs had small heads and slender teeth suited for catching fish and squid, likely relying on stealth and precise strikes. Short-necked plesiosaurs, known as pliosaurs, evolved massive skulls and powerful jaws and became apex predators capable of hunting large prey, including other marine reptiles. Together, these forms made plesiosaurs one of the most successful and adaptable marine reptile groups in Earth’s history, dominating prehistoric seas until their extinction at the end of the Cretaceous.
Plesiosaurs were a diverse group of marine reptiles that lived during the Jurassic and Cretaceous periods, thriving in Earth’s oceans for more than 135 million years. Although they lived alongside dinosaurs, plesiosaurs were not dinosaurs; instead, they were fully aquatic reptiles adapted for life in open water. Their most recognizable features included broad, streamlined bodies, four powerful flippers used for underwater “flight,” and a wide range of neck lengths. Fossils of plesiosaurs have been found on every continent, including Antarctica, showing that they inhabited oceans across the globe.
This group included two main body types that filled very different ecological roles. Long-necked plesiosaurs had small heads and slender teeth suited for catching fish and squid, likely relying on stealth and precise strikes. Short-necked plesiosaurs, known as pliosaurs, evolved massive skulls and powerful jaws and became apex predators capable of hunting large prey, including other marine reptiles. Together, these forms made plesiosaurs one of the most successful and adaptable marine reptile groups in Earth’s history, dominating prehistoric seas until their extinction at the end of the Cretaceous.
About Mosasaurs
Mosasaurs were large, carnivorous marine reptiles that lived during the Late Cretaceous Period, approximately 90 to 66 million years ago. Though often mistaken for dinosaurs, they were actually more closely related to modern monitor lizards, including the Komodo dragon. Over time, their ancestors transitioned from land to sea, evolving paddle-like flippers, streamlined bodies, and powerful tails that made them highly efficient swimmers. Some species developed crescent-shaped, shark-like tail fins that allowed for strong, sustained propulsion through open water. Sizes varied widely, with many species measuring 20 to 30 feet long, while the largest—such as Mosasaurus hoffmannii—may have exceeded 50 feet in length.
As apex predators, mosasaurs occupied the top of the marine food chain. Their long jaws were lined with sharp, conical teeth ideal for gripping slippery prey, and fossil evidence shows they fed on fish, sharks, ammonites, seabirds, and even other mosasaurs. Despite their fully aquatic lifestyle, mosasaurs were air-breathing reptiles and had to surface regularly, much like modern whales. They thrived in oceans around the world until the Cretaceous–Paleogene extinction event 66 million years ago, which wiped out the dinosaurs and many marine reptiles, bringing the age of mosasaurs to an end.
Mosasaurs were large, carnivorous marine reptiles that lived during the Late Cretaceous Period, approximately 90 to 66 million years ago. Though often mistaken for dinosaurs, they were actually more closely related to modern monitor lizards, including the Komodo dragon. Over time, their ancestors transitioned from land to sea, evolving paddle-like flippers, streamlined bodies, and powerful tails that made them highly efficient swimmers. Some species developed crescent-shaped, shark-like tail fins that allowed for strong, sustained propulsion through open water. Sizes varied widely, with many species measuring 20 to 30 feet long, while the largest—such as Mosasaurus hoffmannii—may have exceeded 50 feet in length.
As apex predators, mosasaurs occupied the top of the marine food chain. Their long jaws were lined with sharp, conical teeth ideal for gripping slippery prey, and fossil evidence shows they fed on fish, sharks, ammonites, seabirds, and even other mosasaurs. Despite their fully aquatic lifestyle, mosasaurs were air-breathing reptiles and had to surface regularly, much like modern whales. They thrived in oceans around the world until the Cretaceous–Paleogene extinction event 66 million years ago, which wiped out the dinosaurs and many marine reptiles, bringing the age of mosasaurs to an end.
SPECIES
Plesiosaur sp, Mosasaur sp.
AGE
LOCATION
Oulad Abdoun Basin, Morocco
FORMATION
Phosphate Deposits
SIZE
4.3" wide (including process), 1.3" tooth, 5.9 x 4.8" rock
CATEGORY
SUB CATEGORY
ITEM
#113828
We guarantee the authenticity of all of our specimens.
