Taxobox
fossil_range = Ediacaran — around 555 Ma
regnum = "incertae sedis"
phylum = "incertae sedis": Arthropoda?
genus = "Parvancorina"
genus_authority = Glaessner 1958
type_species = "Parvancorina minchami"
type_species_authority = Glaessner 1958
subdivision_ranks = Species
subdivision =
* "P. minchami"
* "P. sagitta"
"Parvancorina" is a genus of shield-shaped Ediacaran fossils. It has a raised ridge down the central axis of symmetry. This ridge can be high in unflattened fossils. At the 'head' end of the ridge there are two quarter circle shaped raised arcs attached. In front of this are two nested semicircular lines. Teeth seem to come from the raised parts pointing into the centre spaces. These may show as raised lines. The fossils are normally about 1 cm in each of width, length and height, but can be up to 2 cm.
"Parvancorina" is compared with the Burgess Shale organism "Burgessia", and also to "Skania fragilis", and is similar in shape to a trilobite. Similar fossils are found in the middle Cambrian beds in the middle Kaili Formation near Balang, Guizhou, China. "Parvancorina" also resembles the meraspid larval form of trilobites. [ [http://www.trilobites.info/origins.htm Trilobite ancestry] - URL retrieved 9 February 2007]
Interestingly, the organisms typically lived with their "heads" pointing into oncoming currents.[cite journal]
author = Droser, Mary L.
title = Anchors away: ANATOMY OF AN EDIACARAN SEA FLOOR DOMINATED BY "Parvancorina"
journal = Geological Society of America: Abstracts with Programs
volume = 39
issue = 6
pages = 332] Notes
References
*Citation
author = Glaessner, M. F.
year = 1958
title = New Fossils from the Base of the Cambrian in South Australia
volume = 81
pages = 185–188
url = http://www.samuseum.sa.gov.au/Journals/TRSSA/TRSSA_V081/TRSSA_V081_p185p188.pdf
*cite journal
author = Lin, Jih-Pai; Gon, S. M., III, Gehling, J. G., Babcock, L. E., Zhao Yuan-Long, Zhang Xing-Liang, Hu Shi-Xue, Yuan Jin-Liang, Yu Mei-Yi & Peng Jin. 2006.
year = 2006
title = A "Parvancorina"-Like Arthropod from the Cambrian of South China
journal = Historical Biology
volume = 18
pages = 33
doi = 10.1080/08912960500508689
*cite journal
author = Glaessner, M. F.
year = 1980
title = Parvancorina - an Arthropod from the Late Precambrian Fauna of the Ediacara Fossil Reserve
journal = Records of the South Australia Museum
volume = 13
pages = 83–90
url = http://www.samuseum.sa.gov.au/Journals/RSAM/RSAM_v013/rsam_v013_p369p402.pdf
External links
* [http://members.tripod.com/~Cambrian/Parvancorina Chris Nedin's Page]
* [http://www.peripatus.gen.nz/Taxa/Arthropoda/Parvancorina.html Perpatus]
* [http://www.trilobites.info/origins.htm Origins of Trilobites]
