British Ordovician Cystoids, Volume 127, Issues 1-3Palaeontographical Society, 1973 - Cystoidea |
Contents
BRITISH ORDOVICIAN AND SILURIAN | 2 |
DISTRIBUTION OF PROETIDAE IN THE BRITISH ISLES | 85 |
INDEX | 92 |
Copyright | |
Common terms and phrases
abaxially Albian ambulacral facets Archegocystis Ashgill Astroproetus axial furrow axis Begg border furrow Bukry Cambridge Greensand Cenomanian cephalon circum-oral coccoliths convex Cranidia cranidium Cretarhabdus Cyphoproetus cystoids Decoroproetus Deflandre Diagnosis diameter diplopores Diploporita distal shield Distal view dorsal view Etheridge Eucystis figured Folkestone free cheek genal spine genus geol Girvan glabella glabellar furrows gonopore Haplosphaeronis Hockwold Holotype Horizon and locality hydropore lateral occipital lobes lateral view lectotype Limestone Llandovery Lower Gault margin Mildenhall narrow occipital lobes occipital ring Ordovician pairs palpebral lobe paratype peripore periproct peristome petaloid plates pleural areas pleural furrows pleural ribs pore posterior preglabellar field Přibyl proetid Proetus proximal view pygidial pygidium Rawtheyan Reed Remarks Rhiwlas sagittal length Salter Shales Sholeshook Limestone Silurian specimens Sphaeronites stokesii Stradner surface Text-fig theca thorax transverse trilobites type species Upper Gault Warburgella weakly Wenlock Whittard width zone دو دو دو