Chorisonter

Chorisonter is a genus of extinct trilobites belonging to the order Phacopida. These ancient marine arthropods lived during the Devonian period. Fossils of Chorisonter have been found in various locations, indicating a widespread distribution across different paleocontinents. Their classification within the Phacopida order suggests they shared certain characteristics with other members of this group, such as the presence of large, compound eyes often divided into many small lenses. However, specific features of Chorisonter's exoskeleton, including the arrangement of its glabellar furrows and the shape of its pygidium, distinguish it from closely related genera.

The paleoecology of Chorisonter is inferred from the geological strata in which its fossils are found. They are typically discovered in marine sedimentary rocks, often associated with shallow to moderately deep water environments. Their diet and specific ecological niche remain subjects of ongoing research, but like most trilobites, they are presumed to have been benthic or demersal organisms, interacting with the seafloor. The extinction of Chorisonter, along with the vast majority of trilobite species, occurred at the end of the Paleozoic Era, marking the end of their reign as dominant marine invertebrates.