Detailed Pachlocrinus aequalais Cladid Crinoid from Crawfordsville

Name: Inaudinata; Cladida; Pachlocrinus aequalais

Age: Lower Mississippian Osagean Stage (345 m.y.a)

Size (25.4 mm = 1 inch): Crown: 28 mm long by 15 mm wide with a 20 mm stem on a 78 by 50 mm matrix

Location: Crawfordsville, Indiana

Pachlocrinus aequalaisWell-preserved example of an Inadunate crinoid Pachylocrinus aequalis of the Family Pachylocrinidae. The crinoid is very three-dimensional in aspect, with the excellent preservation typical of the Crawfordsville region. In order for such articulated specimens to be preserved, they had to be buried rapidly, presumably by turbidity flows which overcame them. This is a fine example of the variety of diverse crinoids to be found in the Crawfordsville deposits.

click crinoid pictures to enlarge

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