EXQUISITELY PRESERVED Mazon Creek Lamprey Fossil

Mayomyzon pieckoensis

Agnatha, Petromyzontiformes, Mayomyzontidae

Geological Time: Carboniferous, Westphalian Stage

Size (25.4 mm = 1 inch): Fossil is 25 mm on a 45 mm by 24 mm nodule pair

Fossil Site: Mazon Creek, Francis Creek Shale, Braidwood, Illinois

Code: HMC01

Price: $1850.00 - sold

Mayomyzon pieckoensisDescription: The Mazon Creek deposits of the region near Braidwood, Illinois rival the other famous Lagerstatten of the Burgess Shale, Solnhofen, and Liaoning for the variety of detailed life preserved. Many exquisitely-preserved specimens are found in the ironstone nodules that make up the deposits. This fineLamprey example is of the lamprey Maymyzon, and comes from Mazon Creek itself. Since there is no bony tissue, preservation was difficult. Notice the presence of the eye, gills and what seems to be preserved chromatophores in the miniscule dots that can be seen. There is one repaired crack to one side, but it does little to detract from this exceptional specimen. Other than an example from the Mississippian Bear Gulch fauna, this is the only fossil lamprey known. I have recently been able to procure specimens from a family who has been collecting this material in the field for three generations, and will continue posting material as it becomes available to me.

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