Reticycloceras sp.
Late Mississippian
Bear Gulch Limestone
Fergus County, Montana, USA

59mm orthoconic nautiloid with jaws and some soft parts preserved on 89mm matrix from the famous Bear Gulch Limestone. Rare.

Reticycloceras from the Bear Gulch Limestone refers to a specific species or group of nautiloids found in the Bear Gulch Limestone formation, which is located in central Montana, United States. The Bear Gulch Limestone is a famous Lagerstätte, which is a sedimentary deposit that contains exceptionally well-preserved fossils. It dates back to the Carboniferous period, approximately 318 to 307 million years ago.

The fossils found in the Bear Gulch Limestone are notable for their exceptional preservation, which provides detailed insights into ancient marine life during the Carboniferous. Reticycloceras specimens found in this formation are characterized by their distinctive shell morphology, which paleontologists use to identify and study them. These fossils contribute valuable information about the diversity, evolution, and paleoecology of ancient marine organisms during the Carboniferous period.