Amiskwia
Amiskwia is a small, probably gelatinous fossil animal of unknown affinity from Middle Cambrian. It has been found in the Canadian Burgess shale formation near Field, BC. The preservation of the five known specimens leaves much to be desired. It is known that the head contains two short tentacles, and the body has two small lateral (side) fins and a flattened tail. The gut runs straight from the head almost to the tail. Amiskwia was originally categorized by C. D. Walcott, who thought he saw three buccal spines in the fossils, as a chaetognath worm. Some workers held out for it being an nemertean. Morris (1977) regards it as being the single known species in an otherwise unknown phylum.
Amiskwia is thought to have been a swimming animal trapped inadvertently in the turbid flows that formed the Burgess Shale deposits. There is only one known species, Amiskwia sagittiformis.
