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Basilosaurus (meaning "king lizard") is a genus of large, predatory, prehistoric archaeocete whale from the late Eocene, approximately 41.3 to 33.9 million years ago (mya). Here are some detailed aspects of Basilosaurus:

Physical Characteristics

Basilosaurus could grow to lengths of 15-20 meters (50-65 feet), making it one of the largest marine animals of its time. It had an elongated, serpentine body. Its vertebrae were unusually elongated, contributing to its long, snake-like appearance. Basilosaurus had small, vestigial hind limbs that were likely not functional for swimming. These limbs are considered remnants from their land-dwelling ancestors. The teeth of Basilosaurus were well-suited for a carnivorous diet, with large, serrated edges for slicing through flesh.

In summary, Basilosaurus is an extinct early whale that exemplifies significant evolutionary adaptations, bridging the gap between terrestrial ancestors and modern marine cetaceans.

Despite its name, which means "king lizard," Basilosaurus is not a reptile. The name was given before it was understood that Basilosaurus was a marine mammal and not a lizard or dinosaur.



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