Corynexochida

Corynexochida is an order of extinct low-to-moderate level arthropod predators belonging to the group of arachnomorphs. The order is part of the larger clade of members of the arthropod group, associated with the more well-known arachnids. The name Corynexochida comes from the combination of two Greek words referring to horn-like or crown-like structures, and ancient Greek "khodhos", meaning ancient Greek type'socket' or 'eye-socket'. This term is applied to the fossils of the order, showcasing the distinctive eye sockets.

Corynexochida are known from the Ordovician to the Early Carboniferous periods, with fossil remains found in various regions around the world. The order primarily consisted of species with a sturdy, often highly ornamented exoskeleton. A number of distinct features, such as eye sockets that displayed particular horn-like or crown-like protrusions, set apart the Corynexochida from other arachnomorphs.

Different species of Corynexochida varied in size, displaying both relatively small and quite massive body forms. Fossil remains suggest these arthropods may have been primarily predators, the evidence supporting such behavior being mainly based on examination of the implied consumptive patterns and the adaptations found in the fossils. Such adaptations included substantial modifications in the arthropod's limb structure.

Corynexochida is considered to be highly important in furthering our understanding of early arthropod evolution and relationships. Their unique profile of features serves to serve as a reference point for further research into arthropod evolution.