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Temporal range: Cambrian Stage 2–Middle Cambrian
Scientific classification e
Kingdom: Animalia
Phylum: incertae sedis
Class: Coeloscleritophora
Order: Chancelloriida
Family: Chancelloriidae
Genus: Allonnia
Doré and Reid, 1965
  • A. tetrathallus Jiang, 1982
  • A. tripodophora Doré and Reid, 1965 (type)

Allonnia is a genus of coeloscleritophoran known as complete scleritomes from the Middle Cambrian Burgess Shale. It is also a constituent of the small shelly fauna.[1]

Its earliest occurrence in Yunnan dates to the Upper Meishucunian (~ Tommotian / Cambrian Stage 2) [2]


  1. ^ Brock, G. A.; Cooper, B. J. (1993). "Shelly Fossils from the Early Cambrian (Toyonian) Wirrealpa, Aroona Creek, and Ramsay Limestones of South Australia". Journal of Paleontology. 67 (5): 758–787. doi:10.2307/1306041. JSTOR 1306041. 
  2. ^ Kouchinsky A. V., Bengtson S., Runnegar B.N., Skovsted C.B., Steiner M., Vendrasco M.J. 2012. Chronology of early Cambrian biomineralization. Geol. Mag. 149:221–251.