===
Scalidophora === ====
Palaeoscolecidomorpha ==== ====
Priapulida ==== ===
Panarthropoda === ====
Lobopodia ==== =====
Eoconchariidae ===== =====
Hallucishaniids ===== =====
Siberiidae ===== =====
Gilled Lobopodians ===== ====
Radiodonta ==== Radiodonta are a group of highly successful panarthropods. The Chengjiang Fauna includes a large number of Radiodont species, primarily from the clade
Amplectobeluidae. While hurdiids are poorly known from the formation and surrounding region, several specimens attributable to the family have been discovered, but remain unnamed. Some radiodonts from the Chengjiang defy easy classification, or are otherwise debated in their exact affinity. =====
Amplectobeluidae ===== =====
Anomalocarididae ===== =====
Hurdiidae ===== Hurdiids have historically been considered absent, or at least rare, from the Chengjiang Biota, an observation that researchers have found confusing given their regularity at other sites. In recent years, a number of fragmentary hurdiid fossils have been described, including 3 partial appendages belonging to a new species of
Stanleycaris, an isolated sclerite assigned to Cambroraster, Zhenghecaris (the affinities of which, even its identity as a radiodont, remains questionable), and isolated lateral sclerites (also questionable). ====
Arthropoda ==== =====
Hymenocarina ===== =====
Fuxianhuiida ===== =====
Bradoriida ===== =====
Megacheira ===== ======
Leanchoiliidae ====== ======
Jianfengiidae ====== =====
Marrellomorpha ===== =====
Artiopoda ===== ======
Nektaspida ====== =====
Trilobita ===== ==
Spiralia ==