TWO LATE ORDOVICIAN ASTEROIDS (ECHINODERMATA) WITH CHARACTERS SUGGESTIVE OF EARLY OPHIUROIDS

Paleoecologic Associations and Secondary Tiering of Cornulites on Crinoids and Bivalves in the Upper Ordovician (Cincinnatian) of Southwestern Ohio, Southeastern Indiana, and Northern Kentucky

Oldest record of peduncular attachment of brachiopods to crinoid stems, Upper Ordovician, Ohio, U.S.A. (Brachiopoda; Atrypida; Echinodermata; Crinoidea)

Corynotrypa from the Ordovician of North America; colony growth in a primitive stenolaemate bryozoan

Biostratigraphic significance and paleogeographic implications of Cambrian fossils from a deep core, Warren County, Ohio

In situ crustoid graptolite colonies from an Upper Ordovician hardground, southwestern Ohio

Pre-Mount Simon basin under the Cincinnati Arch

Paleoecology of a well-preserved nautiloid assemblage from a Late Ordovician shale unit, southwestern Ohio

Taphonomic effects of sea-floor exposure on an Ordovician brachiopod assemblage

The paleoecology of a Late Ordovician shale unit from Southwest Ohio and southeastern Indiana

A well-preserved specimen of Schuchertoceras (Cephalopoda, Ascocerida) from the Upper Ordovician (basal Richmondian) of Southwest Ohio

Vanuxemia waynesvillensis, a new species of cyrtodontid pelecypod from the Upper Ordovician of Southwest Ohio