RARE Mazon Creek Larval Coelacanth Fossil

Rhabdoderma elegans

Class Crossopterygii, Order Coelacanthiformwes, Family Rhabdodermatidae

Geological Time: Pennsylvanian (~300 m.y.a.)

Size (25.4 mm = 1 inch): Fish fossils is 39 mm across with a 15 mm by 10 mm yolk sac on a 45 mm by 35 mm and 50 mm by 40 mm nodule pair

Fossil Site: Pit 11, Francis Creek shale, Braidwood, Illinois

Code: MZF29

Price: Sold

Rhabdoderma Coelacanth FossilDescription: 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. The majority of collecting areas are the spoil heaps of abandoned coal mines, the most famous of which is Peabody Coal Pit 11. Pit 11 now serves as a cooling pond for the Braidwood nuclear power plant, but with over 100 other localities, specimens still come to light. This fish has a rather cosmopolitan distribution, and is found in Carboniferous coal bed deposits of North America and Europe.

This fine example displays excellent finnage and vertebral column , as well as some skull bones, remarkable for such a poorly ossified specimen. This one did not survive long. Some prefer to separate this one from R. elegans, leaving that name solely for the European taxon, and use the name Rhabdoderma exiguum. Whatever you call it, this is a remarkably well-preserved example collected in the early 1970s shortly before the region was flooded.

Fossil Sales

Marjorie Courtenay-Latimer with the first discovered Coelacanth

Fossil Mall Navigation:
l Home l Fossils for Sale Map l Museum and Rare Fossils l How to Buy Fossils l

Navigate by Fossil Category:
l Trilobites
l Ammonites l Fish Fossils l Invertebrate Fossils l
l Crinoids and Echinoderms l Insect Fossils l Dinosaur and Reptile Fossils l
l Cambrian Explosion Fossils l Plant Fossils l Stromatolites l
l Vertebrate Fossils l Fossil Amber l Trace & Ichnofossils l

l Fossils and Paleotological Science Information l