Grasping Appendage of Anomalocaris from Guanshan Biota

A Terror of the Cambrian

Anomalocaris sp

Phylum Uncertain, Anomalocarididae

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

Size (25.4 mm = 1 inch): Fossil is 29 mm long (curve measure) by 9 mm wide (maximum) on a 55 mm by 85 mm matrix

Fossil Site: Guanshan Fauna, Lower most part of Wulongqing Formation, Caijiachong Valley, Yieyatoung, Gangtoucun Village, Xiamacun Town, Kunming City, Yunnan Province, China - Near and similar to the Chengjiang Biota

Fossil Code: CF404

Price: Sold


Anomalocaris FossilDescription: The discovery of the Chengjiang Biota by Hou Xian-guang in 1984 opened a window onto a remarkable array of life forms from what is termed the Cambrian Explosion. 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 ofAnomalocaris which may have represented failed attempts at diversity that did not persist to the present day.

This is the grasping arm of the “Terror Of The Cambrian”, Anomalocaris, and it 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. The members of this group of enigmatic creatures are known from Asia, Australia, Europe, and North America, and are thought by many to be closely allied with the Arthropoda, as position not held by all researchers. The spiniferous grasping appendages are strongly suggestive of its carnivorous habits; some trilobites from Utah bear evidence of bite marks that have been attributed to Anomalocaris. The genus derives its name from “anomalous shrimp” which was what the describer thought the appendage was.

Also see: Chengjiang Biota Fauna List Chengjiang Fossils

Fossil Sales


Fossil Mall Navigation:
l Home l Fossils for Sale Map l Museum and Rare Fossils l How to Buy Fossils l

Navigate by Fossil Category:
l Trilobites
l Ammonites l Fish Fossils l Invertebrate Fossils l
l Crinoids and Echinoderms l Insect Fossils l Dinosaur and Reptile Fossils l
l Cambrian Explosion Fossils l Plant Fossils l Stromatolites l
l Vertebrate Fossils l Fossil Amber l Trace & Ichnofossils l

l Fossils and Paleotological Science Information l