Allonnia

Allonnia Temporal range: Cambrian Stage 2–Middle Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Reconstruction of A. erjiensis (left) and A. phrixothrix (right) from the Chengjiang biota
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Order:	† Chancelloriida
Family:	† Chancelloriidae
Genus:	† Allonnia Doré and Reid, 1965
Type species
Allonnia tripodophora Doré and Reid, 1965
Species
A. erjiensis Yun, Zhang & Li, 2017 A. erromenosa Jiang, in Luo et al. 1982 [1] A. nuda Cong et al., 2018 A. phrixothrix Bengtson & Hou 2001 A. tetrathallus Jiang, 1982 A. tenuis Zhao et al. 2018 [2] A. quadrocornuformis (Ding & Li, 1992) in Ding et al. (1992) [3] A. rossica (Sayutina, in Vasil'eva & Sayutina 1988) [3] A. tetrathallis (Jiang, in Luo et al. 1982) A. tripodophora Doré and Reid, 1965

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. ^[4]

Its earliest occurrence in Yunnan dates to the Upper Meishucunian (~ Tommotian / Cambrian Stage 2) ^[5]

References

1. Peel, John S.; Streng, Michael; Geyer, Gerd; Kouchinsky, Artem; Skovsted, Christian B. (21 August 2020). "'Ovatoryctocara granulata' assemblage (Cambrian series 2-series 3 boundary) of Londal, North Greenland". Australasian Palaeontological Memoirs (49): 241–282.
2. 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. 92 (6): 1–17. Bibcode:2018JPal...92..955Z. doi:10.1017/jpa.2018.43. S2CID   119066659.
3. Peel, J. (13 April 2025). "Middle Cambrian (Wuliuan Stage) Small Shelly Fossils from North Greenland (Laurentia)". Bulletin of Geosciences: 1–56. doi: 10.3140/bull.geosci.1912 .
4. 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. Bibcode:1993JPal...67..758B. doi:10.1017/s0022336000037045. JSTOR   1306041. S2CID   132278189.
5. 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.