Aysheaia

Taxobox
fossil_range = Mid Cambrian

---

image_caption = Reconstruction of "Aysheaia"
regnum = Animalia
phylum = Onychophora
genus = "Aysheaia"

"Aysheaia pedunculata" was a soft-bodied, caterpillar-shaped organism average body length of 1–6 cm. They are known from fossils found in the middle Cambrian Burgess shale of British Columbia. Similar forms are known from the lower Cambrian Maotianshan shales of China. "Aysheaia" has ten body segments, each of which has a pair of spiked, annulated legs. The animal is segmented, and looks somewhat like a bloated caterpillar with a few spines added on — including six finger-like projections around the mouth and two grasping legs on the "head." Based on its association with sponge remains, it is believed that "Aysheaia" was a sponge grazer and may have protected itself from predators by seeking refuge within sponge colonies. "Aysheaia" probably used its claws to cling to the sponge.

Unlike many early Cambrian forms whose relationships are obscure and puzzling, "Aysheaia" is remarkably similar to a modern phylum, the Onychophora. Only 19 specimens of "Aysheaia" are known.

External links

* [http://www.sites.si.edu/images/exhibits/Burgess%20Shale/images/pages/Aysheaia_jpg_jpg.htm Smithsonian Institution image]