The Ammonoidea of the Plenus Marls and the Middle Chalk |
Contents
SHAW R W L 1969 Beyrichiacean ostracodes from the Downtonian of Shropshire Geol För Stockh Förh | 52 |
846 | 146 |
MCKERROW W S Campbell C J 1960 The stratigraphy and structure of the Lower Palaeozoic rocks of North | 1 |
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Common terms and phrases
adductorial sulcus Ammonites Ammonoidea Aptian Barton Formation Beds BMNH body chamber Bracklesham Bracklesham Group Calycoceras cauda narrow Cenomanian collicula Collignoniceras crenulated Cretaceous Crioceras Crista superior undulant crumina d'Orbigny denticulated depression Devon Diagnosis diameter Dorsal rim East Wittering excisura present female right valve figs Genus Geol geslinianum Zone Holotype Inner and outer Inner face convex inner whorls junction of ostium Kennedy Lateral view lectotype left sacculith lobal lobe lower angle present Mammites nodosoides Mantell Martinsson Middle Chalk Neocardioceras Occurrence ostium ostium and cauda otolith Outer face concave outer ventrolateral Paratype Plenus Marls posteriorly Posterodorsal areas preadductorial node Puzosia radial ribbing right sacculith rim and terminating rim oblique Romaniceras Rostrum Sciponoceras Selsey Selsey Formation Sleia slightly Spath specimens stereo-pair Sulcus opening Sussex syllobial syllobium tecnomorphs Text-fig tubercles Turonian Type species umbilical tubercles Upper Cenomanian velar edge velum venter ventrolateral tubercles Watinoceras Wenlock whorl section woollgari Wright