Trilobites are often placed within the arthropod subphylum Schizoramia within the superclass Arachnomorpha (equivalent to the Arachnata), although several alternative taxonomies are found in the literature.
Trilobit sering diklasifikasikan sebagai arthropoda, subfilum Schizoramia dalam superclass Arachnomorpha (setara dengan Arachnata), meskipun beberapa alternatif taksonomi ditemukan dalam literatur.