Saperion glumaceum, Exceptionally Rare Arthropod from Chengjiang
"fossils of the Cambrian Explosion"

Description: This exceptionally rare arthropod is known as Saperion glumaceum. The species is known from very few compressed examples with little to no relief.

The diversity of soft-tissue fossils is fastonishing: 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.

The taxon is similar to Kuamaia and Skioldia, but readily distinguished from them by the lack of marginal spines and a more elongated body outline. This ventrally-preserved example shows some of the appendages.