Fine Redlichia Trilobite with Antenna Preserved

Description: This fine trilobite specimen comes 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. With the discovery of the Chengjiang Biota in 1984 a window on the Cambrain Explosion in China was opened. The diversity of soft-tissue fossils 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 trilobite is a Redlichia species, the patronymic genus of the Family Redlichiida. Trilobites from this timeframe were members of the Redlichiida, Ptychopariida, Corynexochida, and the Agnostida, with the balance of the orders appearing later in time. What is most unusual about this one is that the antennae are preserved. I have included a negative image of the cephalon of the counterpart example to make it more obvious.

Also see: Chengjiang Biota List Chengjiang Fossils