Museum Quality Cindarella Chengjiang Biota Arthropod

Cindarella eucalla

Phylum Arthropoda

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

Size (25.4mm=1 inch): 55 mm long and 28 mm across on a 65 mm by 45 mm matrix

Fossil Site: Chengjiang Maotianshan Shales - Quiongzhusi Section, Yu’anshan Member, Heilinpu Formation, Ercaicun Village, Anning, Kunming, Yunnan Province, China

Cindarella eucalla ChengjianDescription: This unusual arthropod is known as Cindarella eucalla. The species is known from very few compressed examples. Cindarella

The diversity of soft-tissue fossils of the Chengjiang 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. Cindarella Fossil Image

Cindarella Chengjiang BiotaCindarella eucalla is similar to Xandarella spectaculum, and is such it is quite trilobite-like in appearance, but differs in the lack of a calcified exoskeleton and different eye morphology. The taxon is unknown outside the Chengjiang Biota. The eyes and central gut are clearly visible in this fine near-complete example which may well have more material still obscured by matrix. Notice the “bumps’ in the head region; they may indicate the presence of antennae. I’ve included a false negative photo to help see the placement.

click to enlarge

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