Allonnia

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]

Allonnia
Temporal range: Cambrian Stage 2–Middle Cambrian
Scientific classification
Kingdom: Animalia
Phylum: incertae sedis
Class: †Coeloscleritophora
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[1]
  • A. tripodophora Doré and Reid, 1965 (type)

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

References
  1. 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.
  2. 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.
  3. 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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