Quadratapora

Quadratapora; Temporal range: Cambrian Stage 3 PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
(unranked):	Panarthropoda
Phylum:	†"Lobopodia"
Class:	†Xenusia
Order:	†Archonychophora
Family:	†Eoconchariidae
Genus:	†Quadratapora
Species
	Q. zhenbaensis Hao and Shu, 1987 (type) ; Q. tenuiporatum (Bengtson, Matthews and Missarzhevsky, 1986) ;

Quadratapora is a genus of lobopodian known only from its biomineralized dorsal plates, which somewhat resemble those of Microdictyon.^[1] Q. tenuiporatum is known from a single specimen that was initially described as dating to the Tommotian, representing (perhaps along with Rhombocorniculum)^[2] the earliest record of lobopodians.^[1] However, the material is now thought to be Atdabainan in age, reflecting both a mistake in the initial description of the material^[3] and a revision of the stratigraphy of the Isit section on the Lena river,^[4] from where the single specimen heralds. Q. zhenbaensis is Atdabanian in age.

References

^ ^a ^b Zhang, X. -G.; Aldridge, R. J. (2007). "Development and Diversification of Trunk Plates of the Lower Cambrian Lobopodians". Palaeontology. 50 (2): 401–415. Bibcode:2007Palgy..50..401Z. doi:10.1111/j.1475-4983.2006.00634.x.
^ Caron, J. -B.; Smith, M. R.; Harvey, T. H. P. (2013). "Beyond the Burgess Shale: Cambrian microfossils track the rise and fall of hallucigeniid lobopodians". Proceedings of the Royal Society B: Biological Sciences. 280 (1767): 20131613. doi:10.1098/rspb.2013.1613. PMC 3735267. PMID 23902914.
^ Demidenko, Yu. E. (May 2006). "New Cambrian lobopods and chaetognaths of the Siberian Platform". Paleontological Journal. 40 (3): 234–243. Bibcode:2006PalJ...40..234D. doi:10.1134/S0031030106030026.
^ Parkhaev, P. Yu; Demidenko, Yu. E.; Kulsha, M. A. (March 2020). "The Problematic Fossil Mobergella radiolata as an Index Species of the Lower Cambrian Stages". Stratigraphy and Geological Correlation. 28 (2): 135–156. Bibcode:2020SGC....28..135P. doi:10.1134/S0869593820020057.

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[Zhang2007-1] Zhang, X. -G.; Aldridge, R. J. (2007). "Development and Diversification of Trunk Plates of the Lower Cambrian Lobopodians". Palaeontology. 50 (2): 401–415. Bibcode:2007Palgy..50..401Z. doi:10.1111/j.1475-4983.2006.00634.x.

[Caron2013-2] Caron, J. -B.; Smith, M. R.; Harvey, T. H. P. (2013). "Beyond the Burgess Shale: Cambrian microfossils track the rise and fall of hallucigeniid lobopodians". Proceedings of the Royal Society B: Biological Sciences. 280 (1767): 20131613. doi:10.1098/rspb.2013.1613. PMC 3735267. PMID 23902914.

[3] Demidenko, Yu. E. (May 2006). "New Cambrian lobopods and chaetognaths of the Siberian Platform". Paleontological Journal. 40 (3): 234–243. Bibcode:2006PalJ...40..234D. doi:10.1134/S0031030106030026.

[4] Parkhaev, P. Yu; Demidenko, Yu. E.; Kulsha, M. A. (March 2020). "The Problematic Fossil Mobergella radiolata as an Index Species of the Lower Cambrian Stages". Stratigraphy and Geological Correlation. 28 (2): 135–156. Bibcode:2020SGC....28..135P. doi:10.1134/S0869593820020057.

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