Fuxianhuia , Unusual Arthropod from Chengjiang Biota
"Part and Counterpart"

Fuxianhuia protensa

Phylum Arthropoda

Geological Time: Early Cambrian (~525 million years ago)

Size: 27 mm long on a 35 mm by 25 mm matrix pair

Fossil Site: Chengjiang Maotianshan Shales - Quiongzhusi Section, Yu’anshan Member, Heilinpu Formation, Mafang Village, Haikou County, Yunnan Province, China

Code: CJF244

Price: Sold

Fuxianhuia protensaDescription: This unusual arthropod is known as Fuxianhuia protensa. The species is known from several hundred examples, with this one a part/counterpart pair . 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 Fuxianhuiaproblematic forms are known as well, some of which may have represented failed attempts at diversity that did not persist to the present day.

The systematic position of this taxon is still under debate, with some considering it a basal euarthropod. The discoverer of the Chengjiang Biota and a coworker erected a new family and a new superclass called Proschizoramia which was characterized as a group at any early stage in the evolution of arthropods with biramous limbs. As a positive/negative pair, it is a highly desirable specimen. The taxon is unknown outside the Chengjiang Biota.

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