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Name:
Chancelloria pentacta
Age: Cambrian
Formation: Wheeler Shale
Location: Millard County, Utah
Size: Sponge is 1.6 inches long
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This is an unusual fossil invertebrate. It is a Chancelloria pentacta from Utah. This type of animal is sort of an enigma, and has been found in the Burgess Shale fauna. It was first thought to be a "glass sponge", but it has now been described as a "coeloscleritophoran". This fossil has great detail - the star-shaped sclerites are easily seen under magnification. The red-orange coloration is beautiful and fully natural. There is also a partial "sponge" next to the complete one. This is a very fine example of this odd Cambrian animal.
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