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Temporal range: Early Cambrian–Middle Cambrian
Scientific classification e
Kingdom: Animalia
Phylum: incertae sedis
Class: Coeloscleritophora
Order: Chancelloriida
Family: Chancelloriidae
Genus: Archiasterella
Sdzuy, 1969
  • 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]


  1. ^ a b 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. ISSN 0022-3360. doi:10.1666/0022-3360(2005)079[0987:NCFTEC]2.0.CO;2. 
  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.