Complete crinoid calyx

Submitted by: David Thompson
Taxon: Pithocrinus cooperi
Submit date: 2012-07-04
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Thunder Bay Formation
Age: Erian (Middle Devonian)
Submitter notes: This nice complete crinoid calyx in matrix shows tegmen ornamentation as well as arm attachments for this Pithocrinus cooperi. The crinoid is 1.37 inches,(3.12 cm) high by 1.38 inches,(3.5 cm) wide. The matrix is 2.71 inches, (6.8 cm) wide by 3.2 inches, (8.1 cm) long

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