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Middle Cambrian "phyllocarid" valve

connorp

By connorp
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connorp Regular Member

connorp

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I just received this "phyllocarid" valve from the Marjum Formation (Middle Cambrian) of Utah. It was sold as Canadaspis perfecta. It measures about 1" long and 3/4" tall. Although I don't have a compass, the angles between the hinge line and both the anterior and posterior margins of the valve look to be less than 100 degrees. Several papers I've read state that these angles are usually closer 120 in Canadaspis. Any thoughts on what this might be?

 

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Fossildude19 Regular Member

Fossildude19

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Have you looked into Tuzoia? 

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    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

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"In every walk with nature one receives far more than he seeks."
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piranha Regular Member

piranha

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How about: Branchiocaris pretiosa

 

Briggs, D.E.G., Robison, R.A. 1984

Exceptionally Preserved Nontrilobite Arthropods and Anomalocaris from the Middle Cambrian of Utah.

University of Kansas, Paleontological Contributions, 111:1-23  PDF LINK

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image.png.a84de26dad44fb03836a743755df237c.png

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