Conularid Fossils
From Ohio History Central
Revision as of 17:11, 24 April 2013 by Unknown user (talk)
 Close-up of a conularid from the Mississippian of Indiana; scale in mm |
Conularids (Phylum Conulariida) are conical-shaped, extinct marine invertebrates that have been placed, after much debate, in their own phylum. They are found in Silurian through Middle and Upper Paleozoic marine rocks in Ohio. The exoskeleton is phosphatic and characterized by numerous, closely spaced, horizontal ridges. Most specimens are small but some reached lengths of nearly 12 inches. They are most common in rocks of Mississippian age.