@ElGrandSapon Existe homologia entre os xifosuros e os outros aracnídeos nesse sentido, mas nos primeiros são reais pernas (membros ambulatoriais) e talvez um estado primitivo de pedipalpos (traço ancestral). Isso é inclusive válido para membros extintos
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RT @FossilBonanza: Venustulus waukeshaensis was an early relative of horseshoe crabs that lived in the Silurian Waukesha Lagerstatte in Wis…
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RT @FossilBonanza: Venustulus waukeshaensis was an early relative of horseshoe crabs that lived in the Silurian Waukesha Lagerstatte in Wis…
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RT @FossilBonanza: Venustulus waukeshaensis was an early relative of horseshoe crabs that lived in the Silurian Waukesha Lagerstatte in Wis…