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Males may have had larger crests than females
Complete specimens
Allosaurus manus claw
pterosaurs are more closely related to birds than to crocodiles or any other living reptile
Europe and North America)
Mesolimulus walchi, Horseshoe Crab, medium (Replica) Pachycephalosaurus Males may have had largerComing from the famous 150 million year old Jurassic Solnhofen Lithographic Limestone deposits near Eichstatt, Germany, this is a fine replica example of the Horseshoe Crab Mesolimulus walchi. Xiphosura, the horseshoe crabs, are related to the extinct Eurypterids, and more distantly to spiders and scorpions. Their lineage traces back to the Cambrian, and extends to modern times as the genus Limulus. This fossil is of a similar genus known as