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| Double Crinoid Specimen From The Burlington Formation |
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IOWA
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| Stock Number CCUSM43 |
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Name:
Eutrochocrinus christyi & Azygocrinus rotundus
Age: Mississippian
Formation: Upper Burlington Formation
Location: Lee County, Iowa
Size: Eutrochocrinus is 1.5 inches across.
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Here are two different crinoids from the Mississippian of Iowa. On the left side of the slab is the large disc-shaped crinoid, Eutrochocrinus christyi. On the right side is Azygocrinus rotundus, a very spherical crinoid calyx. Both crinoids are extremely 3-dimensional. The plate structure of the crinoids is quite evident. The arm attachment points are easily seen. The fossils have excellent, off-white color and contrast nicely with the brown matrix. They are well positioned on the semi-rectangular block of limestone. This is a very nice specimen of two different crinoids from the Upper Burlington Formation.
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