Excellent Palaeolenus Guanshan Fauna Trilobite

Description: This trilobite is a member of the Order Ptychopariida from what has been termed the “Guanshan Fauna”, found in the Wulongqing Formation. The Guanshan Fauna shares many genera with the slightly older Chengjiang Biota, but differs at the species level. The diversity of soft-tissue fossils from the Cjengjiang Biota is astonishing: algae, medusiforms, sponges, priapulids, annelid-like worms, echinoderms, arthropods (including trilobites), hemichordates, chordates, and the first agnathan fish make up just a small fraction of the total. Numerous problematic forms are known as well, some of which may have represented failed attempts at diversity that did not persist to the present day. This is a fine part and counterpart specimen of the taxon.

Also see: Chengjiang Biota Fauna List Chengjiang Fossils