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helmet-like head armor
Early to Middle Cretaceous (140-110 m
The most desired specimens are the dorsal presentations
On 23 December 1938
A 2009 study showed that large tail knobs could generate sufficient force to break bone during impacts
Libellulium longilatum, dragonfly Posters helmet-like head armorLibellulium longilatum (formerly known as Cymatophlebia) is a 150 million year old dragonfly known from the Solnhofen fossil beds of Germany. Libellulium is recognized by its large, powerful wings. Dragonflies first appeared about 250 million years ago during the Early Permain Period. Since then, they have changed little, making them one of the oldest and most successful living groups of insects. Along with damselflies, dragonflies are insects that
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