Archiasterella

Archiasterella Temporal range: Early Cambrian–Middle Cambrian PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	incertae sedis
Class:	†Coeloscleritophora
Order:	Chancelloriida
Family:	Chancelloriidae
Genus:	Archiasterella Sdzuy, 1969
Species
A. fletchergryllus Randell et al, 2003[1] A. hirundo Bengston, 1990 (in Bengston et al) A. pentactina Sdzuy, 1969 (type)

Achiasterella is a genus of scleritophoran known from the Burgess Shale and earlier (Branchian) deposits,^[1] and originally described as Chancelloria by Walcott.^[2] The species may represent form taxa rather than true species.^[3]

References

1. Randell, R. D.; Lieberman, B. S.; Hasiotis, S. T.; Pope, M. C. (2005). "New Chancelloriids from the Early Cambrian Sekwi Formation with a Comment on Chancelloriid Affinities". Journal of Paleontology 79: 987. doi:10.1666/0022-3360(2005)079[0987:NCFTEC]2.0.CO;2. ISSN 0022-3360.
2. Bengtson, Stefan; Collins, Desmond (August 2009). "Burgess Shale Chancelloriids – A Prickly Problem" (PDF). In Smith, Martin R.; O'Brien, Lorna J.; Caron, Jean-Bernard. Abstract Volume. International Conference on the Cambrian Explosion (Walcott 2009). Toronto, Ontario, Canada: The Burgess Shale Consortium (published 31 July 2009). ISBN 978-0-9812885-1-2.
3. "Skeletonized microfossils from the Lower–Middle Cambrian transition of the Cantabrian Mountains, northern Spain" (pdf). Retrieved 10 June 2013.