22 pages matching straight crenulae in this book
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areola articular facets articulum axial canal Borden Group characteristics of genus cirri cirrus scars Cisco Group claustra Columnal pluricolumnal columnals and pluricolumnals convex crenulae crenularium crinoid columns crinoid stems Crinoidea culmina Cyclocaudex diameter disarticulated dorsal cup Echinodermata elliptical epifacet Facetal and side facetal views figure Formation Fossil Crinoids Based fulcral ridges Geol height holdfast homeomorphic Illustrations.—Plate internodals Kansas Paleont L.Miss large circular lumen latera Limestone Lower Mississippian M.Penn McCulloch County mid-height Middle Devonian Middle Pennsylvanian Miller Mississippian Moore & Jeffords nals nodals noditaxes Nomenclature of Fossil Occurrence.—Middle Occurrence.—Upper Ordovician Osagian Paleozoic pentagonal pentalobate pentameres perilumen Permian plates pluricolumnals radial Shale Shale Member Side and facetal side views sides of columnals Silurian skeletal smooth species Stem straight crenulae Studies of Dissociated sutures Texas loc theca transverse type species type specimen showing Type specimen.—UKPI UKPI Univ Upper Pennsylvanian Upper Silurian views of type Wayland Shale xenomorphic Yeltysheva