Crinoid plate

Submitted by: David Thompson
Taxon: Arthroacantha carpenteri
Submit date: 2013-01-20
Location (approximate): Sylvania, Lucas, OH
Stratigraphy: Silica Formation
Age: Erian (Middle Devonian)
Submitter notes: This crinoid was collected in May, 1963 but not prepared or cleaned until now. This is a interesting Arthroacantha carpenteri from unit 13 of the Silica formation in Sylvania, OH. It was collected by Tom Witherspoon, Sr. and shows the lovely 'Sunflower' pattern of the crinoid crown with the arms displayed. In this case, some creature has disrupted or eaten the arm bases at the top of the specimen and the remaining arms are at a lower level then the calyx. The entire plate is 22 cm by 13 cm (8 1/2' by 5 1/4'), the stem is 8 cm or 3 1/4' long, Maximum arm spread is 15 cm or 6' wide.

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