What organism does not poses features that identify them as an arachnid?

Organisms such as insects do not possess features that identify them as arachnids. Unlike arachnids, which have eight legs and two main body segments (the cephalothorax and abdomen), insects have six legs and three body segments (head, thorax, and abdomen). Additionally, insects typically have antennae, while arachnids do not. These morphological differences clearly distinguish insects from arachnids.