File:Chancelloria eros (fossil coeloscleritophoran) (Wheeler Formation, Middle Cambrian; House Range, Millard County, Utah, USA) 2.jpg

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English: Chancelloria eros Walcott, 1920 - fossil coeloscleritophoran from the Cambrian of Utah, USA.

Cambrian rocks frequently produce some of the oddest-looking organisms anywhere in the fossil record. One distinctive group of fossil organisms long known from Cambrian rocks is the chancelloriids. Chancelloriids have bag-shaped bodies covered with multirayed sclerites. They are often perceived as representing fossil sponges (Porifera), but ultrastructural studies on chancelloriid skeletal components show that they are a separate group.

This is a partial scleritome of Chancelloria eros that comes from the “deep Wheeler Lagerstätte” (sensu Robison, 1991 in The Early Evolution of Metazoa and the Significance of Problematic Taxa), one of several famous soft-bodied fossil deposits in Utah. Most chancelloriid fossils are isolated sclerites, typically collected from acid residues of Cambrian limestones.

Classification: Animalia, Coeloscleritophora, Chancelloriidae

Stratigraphy: Wheeler Formation, upper Ptychagnostus atavus Interval-zone (= lower Bolaspidella Assemblage-zone), upper Middle Cambrian

Locality: unrecorded/undisclosed site in the House Range, northern Millard County, western Utah, USA
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Source https://www.flickr.com/photos/47445767@N05/50742448743/
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50742448743. It was reviewed on 21 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

21 December 2020

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current14:45, 21 December 2020Thumbnail for version as of 14:45, 21 December 20201,619 × 1,090 (1.37 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50742448743/ with UploadWizard

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