![]() ![]() ![]() Hyphalosaurus belonged to this last class of choristoderes. Some choristoderes looked like lizards or crocodiles, while others resembled miniature versions of plesiosaurs, ancient marine reptiles with barrel-shaped bodies, short tails, paddle-like limbs and, in some cases, long serpentine necks - somewhat like the mythical Loch Ness monster. Instead, it belonged to a diverse group of primitive aquatic and semi-aquatic creatures called choristoderes. While a reptile, Hyphalosaurus was not a dinosaur. The creature, called Hyphalosaurus lingyuanensis, died at a young age during the Cretaceous period 120 million years ago, during the twilight of the dinosaur’s reign. This double-noggin phenomenon occurs when an embryo is damaged and some body parts develop twice.īuffetaut and his colleagues uncovered the remains in the Yixian Formation in northeastern China, a rich fossil deposit famous for its treasure trove of feathered dinosaur and early bird remains. ![]() 22 issue of the journal Biology Letters, marks the earliest known occurrence of a well-known birth defect, called axial bifurcation, in living reptiles. ![]()
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