Parasitic gall on crinoid columnal

Submitted by: David Thompson
Taxon: Myzostomida
Submit date: 2014-07-08
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Potter Farm Formation
Age: Erian (Middle Devonian)
Submitter notes: This is an infested crinoid stem with multiple small borings of a parasitic worm: Myzostomida. This has 9 borings in this one stem section. Not too much is known about these galls or tumors as they are also called. They are not too common.

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