Allonnia

Allonnia; Temporal range: Cambrian Stage 2–Middle Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Order:	†Chancelloriida
Family:	†Chancelloriidae
Genus:	†Allonnia; Doré and Reid, 1965
Species
	A. erjiensis Yun, Zhang & Li, 2017 ; A. nuda Cong et al., 2018 ; A. tetrathallus Jiang, 1982 ; A. tenuis Zhao et al. 2018 ; 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.^[2]

Its earliest occurrence in Yunnan dates to the Upper Meishucunian (~ Tommotian / Cambrian Stage 2) ^[3]

References

^ Zhao, Jun; Li, Guo-Biao; Selden, Paul A (2018). "New well-preserved scleritomes of Chancelloriida from early Cambrian Guanshan Biota, eastern Yunnan, China". Journal of Paleontology: 1–17. doi:10.1017/jpa.2018.43.
^ 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:10.1017/s0022336000037045. JSTOR 1306041.
^ 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.

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