Rare Mississippian Bear Gulch Fish Fossils Association
Fubarichthys copiosus with Unidentified Sarcoptergyian

Fubarichthys copiosus

Class Actinoptergyii, Order Paleonisciformes

Sarcopterygii indet.

Geological Time: Mississippian (~320 m.y.a.)

Size (25.4mm=1 inch): Fubarichthys 72 mm (if straight) Sarcoptyerygian: 61 mm long by 21 mm high Matrix: 165 mm by 280 mm

Fossil Site: Heath Shale Formation, Bear Gulch Limestone, Fergus County, Montana

Fossil Code: BGF06

Price: $995.00 - sold

Fubarichthys copiosusDescription: The Bear Gulch Limestone is a deposit of some 70 square km in extent and 30 m in depth that has been a source of one of the most diverse assemblages of fossil fish with some 110 species having been described over the past 30 years. Most were new to science, and provided a unique view of the marine environment of Mississippian times. Fine preservation of both fish and invertebrates is a hallmark of these deposits, presumably due to an anoxic depositional Sarcoptergyii environment. This plaque shows 2 fish of radically different morphology. The lower fish is a Palaeoniscoid with a most unusual name: Fubarichthys. The name was given to the fish because most specimens are found with a severely disarticulated head (fubar in common parlance means fouled up beyond all recognition). The upper fish is an as yet indeterminate Sarcopterygian which goes by the common name “Round Tail” for obvious reasons. The Sacrcopterygii are known as the lobe-finned fish, and contain both the Coelacanths and the Lungfish. Unlike other types of fish, they have a central appendage to the fins containing many bones and muscles. The group eventually gave rise to the Tetrapods. Note the exceptional detail to this fine specimen.

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